sqlHelper類的中文 詳細註釋
sqlHelper類的中文 詳細註釋
using System;
using System.Data;
using System.Xml;
using System.Data.SqlClient;
using System.Collections;
namespace Book.DAL
{
/// <summary>
/// SqlServer資料訪問幫助類
/// </summary>
public sealed class SqlHelper
{
#region 私有建構函式和方法
private SqlHelper() {}
/// <summary>
/// 將SqlParameter引數陣列(引數值)分配給SqlCommand命令.
/// 這個方法將給任何一個引數分配DBNull.Value;
/// 該操作將阻止預設值的使用.
/// </summary>
/// <param name="command">命令名</param>
/// <param name="commandParameters">SqlParameters陣列</param>
private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters)
{
if( command == null ) throw new ArgumentNullException( "command" );
if( commandParameters != null )
{
foreach (SqlParameter p in commandParameters)
{
if( p != null )
{
// 檢查未分配值的輸出引數,將其分配以DBNull.Value.
if ( ( p.Direction == ParameterDirection.InputOutput || p.Direction == ParameterDirection.Input ) &&
(p.Value == null))
{
p.Value = DBNull.Value;
}
command.Parameters.Add(p);
}
}
}
}
/// <summary>
/// 將DataRow型別的列值分配到SqlParameter引數陣列.
/// </summary>
/// <param name="commandParameters">要分配值的SqlParameter引數陣列</param>
/// <param name="dataRow">將要分配給儲存過程引數的DataRow</param>
private static void AssignParameterValues(SqlParameter[] commandParameters, DataRow dataRow)
{
if ((commandParameters == null) || (dataRow == null))
{
return;
}
int i = 0;
// 設定引數值
foreach(SqlParameter commandParameter in commandParameters)
{
// 建立引數名稱,如果不存在,只丟擲一個異常.
if( commandParameter.ParameterName == null ||
commandParameter.ParameterName.Length <= 1 )
throw new Exception(
string.Format("請提供引數{0}一個有效的名稱{1}.", i, commandParameter.ParameterName ) );
// 從dataRow的表中獲取為引數陣列中陣列名稱的列的索引.
// 如果存在和引數名稱相同的列,則將列值賦給當前名稱的引數.
if (dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(1)) != -1)
commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];
i++;
}
}
/// <summary>
/// 將一個物件陣列分配給SqlParameter引數陣列.
/// </summary>
/// <param name="commandParameters">要分配值的SqlParameter引數陣列</param>
/// <param name="parameterValues">將要分配給儲存過程引數的物件陣列</param>
private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues)
{
if ((commandParameters == null) || (parameterValues == null))
{
return;
}
// 確保物件陣列個數與引數個數匹配,如果不匹配,丟擲一個異常.
if (commandParameters.Length != parameterValues.Length)
{
throw new ArgumentException("引數值個數與引數不匹配.");
}
// 給引數賦值
for (int i = 0, j = commandParameters.Length; i < j; i++)
{
// If the current array value derives from IDbDataParameter, then assign its Value property
if (parameterValues[i] is IDbDataParameter)
{
IDbDataParameter paramInstance = (IDbDataParameter)parameterValues[i];
if( paramInstance.Value == null )
{
commandParameters[i].Value = DBNull.Value;
}
else
{
commandParameters[i].Value = paramInstance.Value;
}
}
else if (parameterValues[i] == null)
{
commandParameters[i].Value = DBNull.Value;
}
else
{
commandParameters[i].Value = parameterValues[i];
}
}
}
/// <summary>
/// 預處理使用者提供的命令,資料庫連線/事務/命令型別/引數
/// </summary>
/// <param name="command">要處理的SqlCommand</param>
/// <param name="connection">資料庫連線</param>
/// <param name="transaction">一個有效的事務或者是null值</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字, 其它.)</param>
/// <param name="commandText">儲存過程名或都T-SQL命令文字</param>
/// <param name="commandParameters">和命令相關聯的SqlParameter引數陣列,如果沒有引數為'null'</param>
/// <param name="mustCloseConnection"><c>true</c> 如果連線是開啟的,則為true,其它情況下為false.</param>
private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, out bool mustCloseConnection )
{
if( command == null ) throw new ArgumentNullException( "command" );
if( commandText == null || commandText.Length == 0 ) throw new ArgumentNullException( "commandText" );
// If the provided connection is not open, we will open it
if (connection.State != ConnectionState.Open)
{
mustCloseConnection = true;
connection.Open();
}
else
{
mustCloseConnection = false;
}
// 給命令分配一個資料庫連線.
command.Connection = connection;
// 設定命令文字(儲存過程名或SQL語句)
command.CommandText = commandText;
// 分配事務
if (transaction != null)
{
if( transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
command.Transaction = transaction;
}
// 設定命令型別.
command.CommandType = commandType;
// 分配命令引數
if (commandParameters != null)
{
AttachParameters(command, commandParameters);
}
return;
}
#endregion 私有建構函式和方法結束
#region ExecuteNonQuery命令
/// <summary>
/// 執行指定連線字串,型別的SqlCommand.
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字, 其它.)</param>
/// <param name="commandText">儲存過程名稱或SQL語句</param>
/// <returns>返回命令影響的行數</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText)
{
return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定連線字串,型別的SqlCommand.如果沒有提供引數,不返回結果.
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字, 其它.)</param>
/// <param name="commandText">儲存過程名稱或SQL語句</param>
/// <param name="commandParameters">SqlParameter引數陣列</param>
/// <returns>返回命令影響的行數</returns>
public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
return ExecuteNonQuery(connection, commandType, commandText, commandParameters);
}
}
/// <summary>
/// 執行指定連線字串的儲存過程,將物件陣列的值賦給儲存過程引數,
/// 此方法需要在引數快取方法中探索引數並生成引數.
/// </summary>
/// <remarks>
/// 這個方法沒有提供訪問輸出引數和返回值.
/// 示例:
/// int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串/param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="parameterValues">分配到儲存過程輸入引數的物件陣列</param>
/// <returns>返回受影響的行數</returns>
public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果存在引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從探索儲存過程引數(載入到快取)並分配給儲存過程引數陣列.
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數情況下
return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定資料庫連線物件的命令
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別(儲存過程,命令文字或其它.)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <returns>返回影響的行數</returns>
public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText)
{
return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫連線物件的命令
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別(儲存過程,命令文字或其它.)</param>
/// <param name="commandText">T儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter引數陣列</param>
/// <returns>返回影響的行數</returns>
public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
// 建立SqlCommand命令,並進行預處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );
// Finally, execute the command
int retval = cmd.ExecuteNonQuery();
// 清除引數,以便再次使用.
cmd.Parameters.Clear();
if( mustCloseConnection )
connection.Close();
return retval;
}
/// <summary>
/// 執行指定資料庫連線物件的命令,將物件陣列的值賦給儲存過程引數.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值
/// 示例:
/// int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回影響的行數</returns>
public static int ExecuteNonQuery(SqlConnection connection, string spName, params object[] parameterValues)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給儲存過程分配引數值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行帶事務的SqlCommand.
/// </summary>
/// <remarks>
/// 示例.:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
/// </remarks>
/// <param name="transaction">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別(儲存過程,命令文字或其它.)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <returns>返回影響的行數/returns>
public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText)
{
return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行帶事務的SqlCommand(指定引數).
/// </summary>
/// <remarks>
/// 示例:
/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別(儲存過程,命令文字或其它.)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter引數陣列</param>
/// <returns>返回影響的行數</returns>
public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
// 預處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );
// 執行
int retval = cmd.ExecuteNonQuery();
// 清除引數集,以便再次使用.
cmd.Parameters.Clear();
return retval;
}
/// <summary>
/// 執行帶事務的SqlCommand(指定引數值).
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值
/// 示例:
/// int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
/// </remarks>
/// <param name="transaction">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回受影響的行數</returns>
public static int ExecuteNonQuery(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數值
return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteNonQuery方法結束
#region ExecuteDataset方法
/// <summary>
/// 執行指定資料庫連線字串的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText)
{
return ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫連線字串的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">SqlParamters引數陣列</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
// 建立並開啟資料庫連線物件,操作完成釋放物件.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 呼叫指定資料庫連線字串過載方法.
return ExecuteDataset(connection, commandType, commandText, commandParameters);
}
}
/// <summary>
/// 執行指定資料庫連線字串的命令,直接提供引數值,返回DataSet.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值.
/// 示例:
/// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中檢索儲存過程引數
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 給儲存過程引數分配值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定資料庫連線物件的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText)
{
return ExecuteDataset(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫連線物件的命令,指定儲存過程引數,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter引數陣列</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
// 預處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );
// 建立SqlDataAdapter和DataSet.
using( SqlDataAdapter da = new SqlDataAdapter(cmd) )
{
DataSet ds = new DataSet();
// 填充DataSet.
da.Fill(ds);
cmd.Parameters.Clear();
if( mustCloseConnection )
connection.Close();
return ds;
}
}
/// <summary>
/// 執行指定資料庫連線物件的命令,指定引數值,返回DataSet.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸入引數和返回值.
/// 示例.:
/// DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlConnection connection, string spName, params object[] parameterValues)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 比快取中載入儲存過程引數
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給儲存過程引數分配值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteDataset(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定事務的命令,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText)
{
return ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定事務的命令,指定引數,返回DataSet.
/// </summary>
/// <remarks>
/// 示例:
/// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter引數陣列</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
// 預處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );
// 建立 DataAdapter & DataSet
using( SqlDataAdapter da = new SqlDataAdapter(cmd) )
{
DataSet ds = new DataSet();
da.Fill(ds);
cmd.Parameters.Clear();
return ds;
}
}
/// <summary>
/// 執行指定事務的命令,指定引數值,返回DataSet.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸入引數和返回值.
/// 示例.:
/// DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">事務</param>
/// <param name="spName">儲存過程名</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回一個包含結果集的DataSet</returns>
public static DataSet ExecuteDataset(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給儲存過程引數分配值
AssignParameterValues(commandParameters, parameterValues);
return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteDataset資料集命令結束
#region ExecuteReader 資料閱讀器
/// <summary>
/// 列舉,標識資料庫連線是由SqlHelper提供還是由呼叫者提供
/// </summary>
private enum SqlConnectionOwnership
{
/// <summary>由SqlHelper提供連線</summary>
Internal,
/// <summary>由呼叫者提供連線</summary>
External
}
/// <summary>
/// 執行指定資料庫連線物件的資料閱讀器.
/// </summary>
/// <remarks>
/// 如果是SqlHelper開啟連線,當連線關閉DataReader也將關閉.
/// 如果是呼叫都開啟連線,DataReader由呼叫都管理.
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="transaction">一個有效的事務,或者為 'null'</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParameters引數陣列,如果沒有引數則為'null'</param>
/// <param name="connectionOwnership">標識資料庫連線物件是由呼叫者提供還是由SqlHelper提供</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
bool mustCloseConnection = false;
// 建立命令
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );
// 建立資料閱讀器
SqlDataReader dataReader;
if (connectionOwnership == SqlConnectionOwnership.External)
{
dataReader = cmd.ExecuteReader();
}
else
{
dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
// 清除引數,以便再次使用..
// HACK: There is a problem here, the output parameter values are fletched
// when the reader is closed, so if the parameters are detached from the command
// then the SqlReader can磘 set its values.
// When this happen, the parameters can磘 be used again in other command.
bool canClear = true;
foreach(SqlParameter commandParameter in cmd.Parameters)
{
if (commandParameter.Direction != ParameterDirection.Input)
canClear = false;
}
if (canClear)
{
cmd.Parameters.Clear();
}
return dataReader;
}
catch
{
if( mustCloseConnection )
connection.Close();
throw;
}
}
/// <summary>
/// 執行指定資料庫連線字串的資料閱讀器.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText)
{
return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫連線字串的資料閱讀器,指定引數.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <param name="commandParameters">SqlParamter引數陣列(new SqlParameter("@prodid", 24))</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
SqlConnection connection = null;
try
{
connection = new SqlConnection(connectionString);
connection.Open();
return ExecuteReader(connection, null, commandType, commandText, commandParameters,SqlConnectionOwnership.Internal);
}
catch
{
// If we fail to return the SqlDatReader, we need to close the connection ourselves
if( connection != null ) connection.Close();
throw;
}
}
/// <summary>
/// 執行指定資料庫連線字串的資料閱讀器,指定引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
/// 示例:
/// SqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
if ((parameterValues != null) && (parameterValues.Length > 0))
{
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
AssignParameterValues(commandParameters, parameterValues);
return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定資料庫連線物件的資料閱讀器.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名或T-SQL語句</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText)
{
return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// [呼叫者方式]執行指定資料庫連線物件的資料閱讀器,指定引數.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandParameters">SqlParamter引數陣列</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
/// <summary>
/// [呼叫者方式]執行指定資料庫連線物件的資料閱讀器,指定引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
/// 示例:
/// SqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">T儲存過程名</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlConnection connection, string spName, params object[] parameterValues)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
if ((parameterValues != null) && (parameterValues.Length > 0))
{
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
AssignParameterValues(commandParameters, parameterValues);
return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return ExecuteReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// [呼叫者方式]執行指定資料庫事務的資料閱讀器,指定引數值.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText)
{
return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// [呼叫者方式]執行指定資料庫事務的資料閱讀器,指定引數.
/// </summary>
/// <remarks>
/// 示例:
/// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External);
}
/// <summary>
/// [呼叫者方式]執行指定資料庫事務的資料閱讀器,指定引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// SqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReader(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
AssignParameterValues(commandParameters, parameterValues);
return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數值
return ExecuteReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteReader資料閱讀器
#region ExecuteScalar 返回結果集中的第一行第一列
/// <summary>
/// 執行指定資料庫連線字串的命令,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText)
{
// 執行引數為空的方法
return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫連線字串的命令,指定引數,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
// 建立並開啟資料庫連線物件,操作完成釋放物件.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 呼叫指定資料庫連線字串過載方法.
return ExecuteScalar(connection, commandType, commandText, commandParameters);
}
}
/// <summary>
/// 執行指定資料庫連線字串的命令,指定引數值,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數值
return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定資料庫連線物件的命令,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText)
{
// 執行引數為空的方法
return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫連線物件的命令,指定引數,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
// 建立SqlCommand命令,並進行預處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );
// 執行SqlCommand命令,並返回結果.
object retval = cmd.ExecuteScalar();
// 清除引數,以便再次使用.
cmd.Parameters.Clear();
if( mustCloseConnection )
connection.Close();
return retval;
}
/// <summary>
/// 執行指定資料庫連線物件的命令,指定引數值,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlConnection connection, string spName, params object[] parameterValues)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數值
return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定資料庫事務的命令,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText)
{
// 執行引數為空的方法
return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫事務的命令,指定引數,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 示例:
/// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
// 建立SqlCommand命令,並進行預處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );
// 執行SqlCommand命令,並返回結果.
object retval = cmd.ExecuteScalar();
// 清除引數,以便再次使用.
cmd.Parameters.Clear();
return retval;
}
/// <summary>
/// 執行指定資料庫事務的命令,指定引數值,返回結果集中的第一行第一列.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalar(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// PPull the parameters for this stored procedure from the parameter cache ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數值
return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteScalar
#region ExecuteXmlReader XML閱讀器
/// <summary>
/// 執行指定資料庫連線物件的SqlCommand命令,併產生一個XmlReader物件做為結果集返回.
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <returns>返回XmlReader結果集物件.</returns>
public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText)
{
// 執行引數為空的方法
return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫連線物件的SqlCommand命令,併產生一個XmlReader物件做為結果集返回,指定引數.
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
/// <returns>返回XmlReader結果集物件.</returns>
public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
bool mustCloseConnection = false;
// 建立SqlCommand命令,並進行預處理
SqlCommand cmd = new SqlCommand();
try
{
PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection );
// 執行命令
XmlReader retval = cmd.ExecuteXmlReader();
// 清除引數,以便再次使用.
cmd.Parameters.Clear();
return retval;
}
catch
{
if( mustCloseConnection )
connection.Close();
throw;
}
}
/// <summary>
/// 執行指定資料庫連線物件的SqlCommand命令,併產生一個XmlReader物件做為結果集返回,指定引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36);
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱 using "FOR XML AUTO"</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回XmlReader結果集物件.</returns>
public static XmlReader ExecuteXmlReader(SqlConnection connection, string spName, params object[] parameterValues)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數值
return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定資料庫事務的SqlCommand命令,併產生一個XmlReader物件做為結果集返回.
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders");
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <returns>返回XmlReader結果集物件.</returns>
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText)
{
// 執行引數為空的方法
return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null);
}
/// <summary>
/// 執行指定資料庫事務的SqlCommand命令,併產生一個XmlReader物件做為結果集返回,指定引數.
/// </summary>
/// <remarks>
/// 示例:
/// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句 using "FOR XML AUTO"</param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
/// <returns>返回XmlReader結果集物件.</returns>
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
// 建立SqlCommand命令,並進行預處理
SqlCommand cmd = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );
// 執行命令
XmlReader retval = cmd.ExecuteXmlReader();
// 清除引數,以便再次使用.
cmd.Parameters.Clear();
return retval;
}
/// <summary>
/// 執行指定資料庫事務的SqlCommand命令,併產生一個XmlReader物件做為結果集返回,指定引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// XmlReader r = ExecuteXmlReader(trans, "GetOrders", 24, 36);
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
/// <returns>返回一個包含結果集的DataSet.</returns>
public static XmlReader ExecuteXmlReader(SqlTransaction transaction, string spName, params object[] parameterValues)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
// 沒有引數值
return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion ExecuteXmlReader 閱讀器結束
#region FillDataset 填充資料集
/// <summary>
/// 執行指定資料庫連線字串的命令,對映資料表並填充資料集.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)</param>
public static void FillDataset(string connectionString, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( dataSet == null ) throw new ArgumentNullException( "dataSet" );
// 建立並開啟資料庫連線物件,操作完成釋放物件.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 呼叫指定資料庫連線字串過載方法.
FillDataset(connection, commandType, commandText, dataSet, tableNames);
}
}
/// <summary>
/// 執行指定資料庫連線字串的命令,對映資料表並填充資料集.指定命令引數.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
public static void FillDataset(string connectionString, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( dataSet == null ) throw new ArgumentNullException( "dataSet" );
// 建立並開啟資料庫連線物件,操作完成釋放物件.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 呼叫指定資料庫連線字串過載方法.
FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters);
}
}
/// <summary>
/// 執行指定資料庫連線字串的命令,對映資料表並填充資料集,指定儲存過程引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, 24);
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
public static void FillDataset(string connectionString, string spName,
DataSet dataSet, string[] tableNames,
params object[] parameterValues)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( dataSet == null ) throw new ArgumentNullException( "dataSet" );
// 建立並開啟資料庫連線物件,操作完成釋放物件.
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
// 呼叫指定資料庫連線字串過載方法.
FillDataset (connection, spName, dataSet, tableNames, parameterValues);
}
}
/// <summary>
/// 執行指定資料庫連線物件的命令,對映資料表並填充資料集.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
public static void FillDataset(SqlConnection connection, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames)
{
FillDataset(connection, commandType, commandText, dataSet, tableNames, null);
}
/// <summary>
/// 執行指定資料庫連線物件的命令,對映資料表並填充資料集,指定引數.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
public static void FillDataset(SqlConnection connection, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
FillDataset(connection, null, commandType, commandText, dataSet, tableNames, commandParameters);
}
/// <summary>
/// 執行指定資料庫連線物件的命令,對映資料表並填充資料集,指定儲存過程引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// FillDataset(conn, "GetOrders", ds, new string[] {"orders"}, 24, 36);
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
public static void FillDataset(SqlConnection connection, string spName,
DataSet dataSet, string[] tableNames,
params object[] parameterValues)
{
if ( connection == null ) throw new ArgumentNullException( "connection" );
if (dataSet == null ) throw new ArgumentNullException( "dataSet" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
}
else
{
// 沒有引數值
FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames);
}
}
/// <summary>
/// 執行指定資料庫事務的命令,對映資料表並填充資料集.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
public static void FillDataset(SqlTransaction transaction, CommandType commandType,
string commandText,
DataSet dataSet, string[] tableNames)
{
FillDataset (transaction, commandType, commandText, dataSet, tableNames, null);
}
/// <summary>
/// 執行指定資料庫事務的命令,對映資料表並填充資料集,指定引數.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
public static void FillDataset(SqlTransaction transaction, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
FillDataset(transaction.Connection, transaction, commandType, commandText, dataSet, tableNames, commandParameters);
}
/// <summary>
/// 執行指定資料庫事務的命令,對映資料表並填充資料集,指定儲存過程引數值.
/// </summary>
/// <remarks>
/// 此方法不提供訪問儲存過程輸出引數和返回值引數.
///
/// 示例:
/// FillDataset(trans, "GetOrders", ds, new string[]{"orders"}, 24, 36);
/// </remarks>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
/// <param name="parameterValues">分配給儲存過程輸入引數的物件陣列</param>
public static void FillDataset(SqlTransaction transaction, string spName,
DataSet dataSet, string[] tableNames,
params object[] parameterValues)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( dataSet == null ) throw new ArgumentNullException( "dataSet" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果有引數值
if ((parameterValues != null) && (parameterValues.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 給儲存過程引數賦值
AssignParameterValues(commandParameters, parameterValues);
// 呼叫過載方法
FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
}
else
{
// 沒有引數值
FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames);
}
}
/// <summary>
/// [私有方法][內部呼叫]執行指定資料庫連線物件/事務的命令,對映資料表並填充資料集,DataSet/TableNames/SqlParameters.
/// </summary>
/// <remarks>
/// 示例:
/// FillDataset(conn, trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="transaction">一個有效的連線事務</param>
/// <param name="commandType">命令型別 (儲存過程,命令文字或其它)</param>
/// <param name="commandText">儲存過程名稱或T-SQL語句</param>
/// <param name="dataSet">要填充結果集的DataSet例項</param>
/// <param name="tableNames">表對映的資料表陣列
/// 使用者定義的表名 (可有是實際的表名.)
/// </param>
/// <param name="commandParameters">分配給命令的SqlParamter引數陣列</param>
private static void FillDataset(SqlConnection connection, SqlTransaction transaction, CommandType commandType,
string commandText, DataSet dataSet, string[] tableNames,
params SqlParameter[] commandParameters)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( dataSet == null ) throw new ArgumentNullException( "dataSet" );
// 建立SqlCommand命令,並進行預處理
SqlCommand command = new SqlCommand();
bool mustCloseConnection = false;
PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection );
// 執行命令
using( SqlDataAdapter dataAdapter = new SqlDataAdapter(command) )
{
// 追加表對映
if (tableNames != null && tableNames.Length > 0)
{
string tableName = "Table";
for (int index=0; index < tableNames.Length; index++)
{
if( tableNames[index] == null || tableNames[index].Length == 0 ) throw new ArgumentException( "The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames" );
dataAdapter.TableMappings.Add(tableName, tableNames[index]);
tableName += (index + 1).ToString();
}
}
// 填充資料集使用預設表名稱
dataAdapter.Fill(dataSet);
// 清除引數,以便再次使用.
command.Parameters.Clear();
}
if( mustCloseConnection )
connection.Close();
}
#endregion
#region UpdateDataset 更新資料集
/// <summary>
/// 執行資料集更新到資料庫,指定inserted, updated, or deleted命令.
/// </summary>
/// <remarks>
/// 示例:
/// UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
/// </remarks>
/// <param name="insertCommand">[追加記錄]一個有效的T-SQL語句或儲存過程</param>
/// <param name="deleteCommand">[刪除記錄]一個有效的T-SQL語句或儲存過程</param>
/// <param name="updateCommand">[更新記錄]一個有效的T-SQL語句或儲存過程</param>
/// <param name="dataSet">要更新到資料庫的DataSet</param>
/// <param name="tableName">要更新到資料庫的DataTable</param>
public static void UpdateDataset(SqlCommand insertCommand, SqlCommand deleteCommand, SqlCommand updateCommand, DataSet dataSet, string tableName)
{
if( insertCommand == null ) throw new ArgumentNullException( "insertCommand" );
if( deleteCommand == null ) throw new ArgumentNullException( "deleteCommand" );
if( updateCommand == null ) throw new ArgumentNullException( "updateCommand" );
if( tableName == null || tableName.Length == 0 ) throw new ArgumentNullException( "tableName" );
// 建立SqlDataAdapter,當操作完成後釋放.
using (SqlDataAdapter dataAdapter = new SqlDataAdapter())
{
// 設定資料介面卡命令
dataAdapter.UpdateCommand = updateCommand;
dataAdapter.InsertCommand = insertCommand;
dataAdapter.DeleteCommand = deleteCommand;
// 更新資料集改變到資料庫
dataAdapter.Update (dataSet, tableName);
// 提交所有改變到資料集.
dataSet.AcceptChanges();
}
}
#endregion
#region CreateCommand 建立一條SqlCommand命令
/// <summary>
/// 建立SqlCommand命令,指定資料庫連線物件,儲存過程名和引數.
/// </summary>
/// <remarks>
/// 示例:
/// SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="sourceColumns">源表的列名稱陣列</param>
/// <returns>返回SqlCommand命令</returns>
public static SqlCommand CreateCommand(SqlConnection connection, string spName, params string[] sourceColumns)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 建立命令
SqlCommand cmd = new SqlCommand( spName, connection );
cmd.CommandType = CommandType.StoredProcedure;
// 如果有引數值
if ((sourceColumns != null) && (sourceColumns.Length > 0))
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 將源表的列到對映到DataSet命令中.
for (int index=0; index < sourceColumns.Length; index++)
commandParameters[index].SourceColumn = sourceColumns[index];
// Attach the discovered parameters to the SqlCommand object
AttachParameters (cmd, commandParameters);
}
return cmd;
}
#endregion
#region ExecuteNonQueryTypedParams 型別化引數(DataRow)
/// <summary>
/// 執行指定連線資料庫連線字串的儲存過程,使用DataRow做為引數值,返回受影響的行數.
/// </summary>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回影響的行數</returns>
public static int ExecuteNonQueryTypedParams(String connectionString, String spName, DataRow dataRow)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫連線物件的儲存過程,使用DataRow做為引數值,返回受影響的行數.
/// </summary>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回影響的行數</returns>
public static int ExecuteNonQueryTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫事物的儲存過程,使用DataRow做為引數值,返回受影響的行數.
/// </summary>
/// <param name="transaction">一個有效的連線事務 object</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回影響的行數</returns>
public static int ExecuteNonQueryTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// Sf the row has values, the store procedure parameters must be initialized
if (dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteDatasetTypedParams 型別化引數(DataRow)
/// <summary>
/// 執行指定連線資料庫連線字串的儲存過程,使用DataRow做為引數值,返回DataSet.
/// </summary>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回一個包含結果集的DataSet.</returns>
public static DataSet ExecuteDatasetTypedParams(string connectionString, String spName, DataRow dataRow)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
//如果row有值,儲存過程必須初始化.
if ( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫連線物件的儲存過程,使用DataRow做為引數值,返回DataSet.
/// </summary>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回一個包含結果集的DataSet.</returns>
///
public static DataSet ExecuteDatasetTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫事務的儲存過程,使用DataRow做為引數值,返回DataSet.
/// </summary>
/// <param name="transaction">一個有效的連線事務 object</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回一個包含結果集的DataSet.</returns>
public static DataSet ExecuteDatasetTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteReaderTypedParams 型別化引數(DataRow)
/// <summary>
/// 執行指定連線資料庫連線字串的儲存過程,使用DataRow做為引數值,返回DataReader.
/// </summary>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReaderTypedParams(String connectionString, String spName, DataRow dataRow)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if ( dataRow != null && dataRow.ItemArray.Length > 0 )
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫連線物件的儲存過程,使用DataRow做為引數值,返回DataReader.
/// </summary>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫事物的儲存過程,使用DataRow做為引數值,返回DataReader.
/// </summary>
/// <param name="transaction">一個有效的連線事務 object</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回包含結果集的SqlDataReader</returns>
public static SqlDataReader ExecuteReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0 )
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteScalarTypedParams 型別化引數(DataRow)
/// <summary>
/// 執行指定連線資料庫連線字串的儲存過程,使用DataRow做為引數值,返回結果集中的第一行第一列.
/// </summary>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalarTypedParams(String connectionString, String spName, DataRow dataRow)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫連線物件的儲存過程,使用DataRow做為引數值,返回結果集中的第一行第一列.
/// </summary>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalarTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫事務的儲存過程,使用DataRow做為引數值,返回結果集中的第一行第一列.
/// </summary>
/// <param name="transaction">一個有效的連線事務 object</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回結果集中的第一行第一列</returns>
public static object ExecuteScalarTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
#region ExecuteXmlReaderTypedParams 型別化引數(DataRow)
/// <summary>
/// 執行指定連線資料庫連線物件的儲存過程,使用DataRow做為引數值,返回XmlReader型別的結果集.
/// </summary>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回XmlReader結果集物件.</returns>
public static XmlReader ExecuteXmlReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
}
}
/// <summary>
/// 執行指定連線資料庫事務的儲存過程,使用DataRow做為引數值,返回XmlReader型別的結果集.
/// </summary>
/// <param name="transaction">一個有效的連線事務 object</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="dataRow">使用DataRow作為引數值</param>
/// <returns>返回XmlReader結果集物件.</returns>
public static XmlReader ExecuteXmlReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow)
{
if( transaction == null ) throw new ArgumentNullException( "transaction" );
if( transaction != null && transaction.Connection == null ) throw new ArgumentException( "The transaction was rollbacked or commited, please provide an open transaction.", "transaction" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
// 如果row有值,儲存過程必須初始化.
if( dataRow != null && dataRow.ItemArray.Length > 0)
{
// 從快取中載入儲存過程引數,如果快取中不存在則從資料庫中檢索引數資訊並載入到快取中. ()
SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
// 分配引數值
AssignParameterValues(commandParameters, dataRow);
return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
}
else
{
return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
}
}
#endregion
}
/// <summary>
/// SqlHelperParameterCache提供快取儲存過程引數,並能夠在執行時從儲存過程中探索引數.
/// </summary>
public sealed class SqlHelperParameterCache
{
#region 私有方法,欄位,建構函式
// 私有建構函式,妨止類被例項化.
private SqlHelperParameterCache() {}
// 這個方法要注意
private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());
/// <summary>
/// 探索執行時的儲存過程,返回SqlParameter引數陣列.
/// 初始化引數值為 DBNull.Value.
/// </summary>
/// <param name="connection">一個有效的資料庫連線</param>
/// <param name="spName">儲存過程名稱</param>
/// <param name="includeReturnValueParameter">是否包含返回值引數</param>
/// <returns>返回SqlParameter引數陣列</returns>
private static SqlParameter[] DiscoverSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
SqlCommand cmd = new SqlCommand(spName, connection);
cmd.CommandType = CommandType.StoredProcedure;
connection.Open();
// 檢索cmd指定的儲存過程的引數資訊,並填充到cmd的Parameters引數集中.
SqlCommandBuilder.DeriveParameters(cmd);
connection.Close();
// 如果不包含返回值引數,將引數集中的每一個引數刪除.
if (!includeReturnValueParameter)
{
cmd.Parameters.RemoveAt(0);
}
// 建立引數陣列
SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count];
// 將cmd的Parameters引數集複製到discoveredParameters陣列.
cmd.Parameters.CopyTo(discoveredParameters, 0);
// 初始化引數值為 DBNull.Value.
foreach (SqlParameter discoveredParameter in discoveredParameters)
{
discoveredParameter.Value = DBNull.Value;
}
return discoveredParameters;
}
/// <summary>
/// SqlParameter引數陣列的深層拷貝.
/// </summary>
/// <param name="originalParameters">原始引數陣列</param>
/// <returns>返回一個同樣的引數陣列</returns>
private static SqlParameter[] CloneParameters(SqlParameter[] originalParameters)
{
SqlParameter[] clonedParameters = new SqlParameter[originalParameters.Length];
for (int i = 0, j = originalParameters.Length; i < j; i++)
{
clonedParameters[i] = (SqlParameter)((ICloneable)originalParameters[i]).Clone();
}
return clonedParameters;
}
#endregion 私有方法,欄位,建構函式結束
#region 快取方法
/// <summary>
/// 追加引數陣列到快取.
/// </summary>
/// <param name="connectionString">一個有效的資料庫連線字串</param>
/// <param name="commandText">儲存過程名或SQL語句</param>
/// <param name="commandParameters">要快取的引數陣列</param>
public static void CacheParameterSet(string connectionString, string commandText, params SqlParameter[] commandParameters)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( commandText == null || commandText.Length == 0 ) throw new ArgumentNullException( "commandText" );
string hashKey = connectionString + ":" + commandText;
paramCache[hashKey] = commandParameters;
}
/// <summary>
/// 從快取中獲取引數陣列.
/// </summary>
/// <param name="connectionString">一個有效的資料庫連線字元</param>
/// <param name="commandText">儲存過程名或SQL語句</param>
/// <returns>引數陣列</returns>
public static SqlParameter[] GetCachedParameterSet(string connectionString, string commandText)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( commandText == null || commandText.Length == 0 ) throw new ArgumentNullException( "commandText" );
string hashKey = connectionString + ":" + commandText;
SqlParameter[] cachedParameters = paramCache[hashKey] as SqlParameter[];
if (cachedParameters == null)
{
return null;
}
else
{
return CloneParameters(cachedParameters);
}
}
#endregion 快取方法結束
#region 檢索指定的儲存過程的引數集
/// <summary>
/// 返回指定的儲存過程的引數集
/// </summary>
/// <remarks>
/// 這個方法將查詢資料庫,並將資訊儲存到快取.
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字元</param>
/// <param name="spName">儲存過程名</param>
/// <returns>返回SqlParameter引數陣列</returns>
public static SqlParameter[] GetSpParameterSet(string connectionString, string spName)
{
return GetSpParameterSet(connectionString, spName, false);
}
/// <summary>
/// 返回指定的儲存過程的引數集
/// </summary>
/// <remarks>
/// 這個方法將查詢資料庫,並將資訊儲存到快取.
/// </remarks>
/// <param name="connectionString">一個有效的資料庫連線字元.</param>
/// <param name="spName">儲存過程名</param>
/// <param name="includeReturnValueParameter">是否包含返回值引數</param>
/// <returns>返回SqlParameter引數陣列</returns>
public static SqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
{
if( connectionString == null || connectionString.Length == 0 ) throw new ArgumentNullException( "connectionString" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
using(SqlConnection connection = new SqlConnection(connectionString))
{
return GetSpParameterSetInternal(connection, spName, includeReturnValueParameter);
}
}
/// <summary>
/// [內部]返回指定的儲存過程的引數集(使用連線物件).
/// </summary>
/// <remarks>
/// 這個方法將查詢資料庫,並將資訊儲存到快取.
/// </remarks>
/// <param name="connection">一個有效的資料庫連線字元</param>
/// <param name="spName">儲存過程名</param>
/// <returns>返回SqlParameter引數陣列</returns>
internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName)
{
return GetSpParameterSet(connection, spName, false);
}
/// <summary>
/// [內部]返回指定的儲存過程的引數集(使用連線物件)
/// </summary>
/// <remarks>
/// 這個方法將查詢資料庫,並將資訊儲存到快取.
/// </remarks>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名</param>
/// <param name="includeReturnValueParameter">
/// 是否包含返回值引數
/// </param>
/// <returns>返回SqlParameter引數陣列</returns>
internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
using (SqlConnection clonedConnection = (SqlConnection)((ICloneable)connection).Clone())
{
return GetSpParameterSetInternal(clonedConnection, spName, includeReturnValueParameter);
}
}
/// <summary>
/// [私有]返回指定的儲存過程的引數集(使用連線物件)
/// </summary>
/// <param name="connection">一個有效的資料庫連線物件</param>
/// <param name="spName">儲存過程名</param>
/// <param name="includeReturnValueParameter">是否包含返回值引數</param>
/// <returns>返回SqlParameter引數陣列</returns>
private static SqlParameter[] GetSpParameterSetInternal(SqlConnection connection, string spName, bool includeReturnValueParameter)
{
if( connection == null ) throw new ArgumentNullException( "connection" );
if( spName == null || spName.Length == 0 ) throw new ArgumentNullException( "spName" );
string hashKey = connection.ConnectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter":"");
SqlParameter[] cachedParameters;
cachedParameters = paramCache[hashKey] as SqlParameter[];
if (cachedParameters == null)
{
SqlParameter[] spParameters = DiscoverSpParameterSet(connection, spName, includeReturnValueParameter);
paramCache[hashKey] = spParameters;
cachedParameters = spParameters;
}
return CloneParameters(cachedParameters);
}
#endregion 引數集檢索結束
}
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