SQLite Helper類，基於.net c#的SQLite資料庫操作類

SQLite這個精巧的小資料庫，無需安裝軟體，只需要一個System.Data.SQLite.DLL檔案即可操作SQLite資料庫。但是據說功能卻非常強大。

簡介：

SQLite是一個開源資料庫，現在已變得越來越流行，它的體積很小，被廣泛應用於各種不同型別的應用中。SQLite已經是世界上佈署得最廣泛的SQL資料庫引擎，被用在無以計數的桌面電腦應用中，還有消費電子裝置中，如行動電話、掌上電腦和MP3播放器等。SQLite的原始碼就放在公有領域（即WikiPedia的public domain)中。

開始使用:

Sqliteman,windows下最好的sqlite gui客戶端	sqlite,sqliteman	7.72M	2008-8-30	Sqliteman,windows...
SQLite Administrator 0.8.3.2┊是基於資料庫引擎的管理工具┊漢化綠色特別版	sqlite	1.68M	2008-8-29	SQLite 是一個基於輕量級資料...
SQLite，除了access,mysql以外的另外一個輕量級資料庫

 

 

using System;

using System.Collections.Generic;

using System.Text;

using System.Web;

using System.Configuration;

using System.Data;

using System.Data.SQLite;



namespace DAL

{

    public class Sqlite

    {

        /// <summary>

        /// 獲得連線物件

        /// </summary>

        /// <returns></returns>

        public static SQLiteConnection GetSQLiteConnection()

        {

            return new SQLiteConnection("Data Source=" + System.Web.HttpContext.Current.Server.MapPath(System.Configuration.ConfigurationManager.AppSettings["db"].ToString()));

        }



        private static void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn, string cmdText, params object[] p)

        {



            if (conn.State != ConnectionState.Open)

                conn.Open();

            cmd.Parameters.Clear();

            cmd.Connection = conn;

            cmd.CommandText = cmdText;



            cmd.CommandType = CommandType.Text;

            cmd.CommandTimeout = 30;



            if (p != null)

            {

                foreach (object parm in p)

                    cmd.Parameters.AddWithValue(string.Empty, parm);

                //for (int i = 0; i < p.Length; i++)

                //    cmd.Parameters[i].Value = p[i];

            }

        }



        public static DataSet ExecuteDataset(string cmdText, params object[] p)

        {

            DataSet ds = new DataSet();

            SQLiteCommand command = new SQLiteCommand();

            using (SQLiteConnection connection = GetSQLiteConnection())

            {

                PrepareCommand(command, connection, cmdText, p);

                SQLiteDataAdapter da = new SQLiteDataAdapter(command);

                da.Fill(ds);

            }



            return ds;

        }



        public static DataRow ExecuteDataRow(string cmdText, params object[] p)

        {

            DataSet ds = ExecuteDataset(cmdText, p);

            if (ds != null && ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)

                return ds.Tables[0].Rows[0];

            return null;

        }



        /// <summary>

        /// 返回受影響的行數

        /// </summary>

        /// <param name="cmdText">a</param>

        /// <param name="commandParameters">傳入的引數</param>

        /// <returns></returns>

        public static int ExecuteNonQuery(string cmdText, params object[] p)

        {

            SQLiteCommand command = new SQLiteCommand();



            using (SQLiteConnection connection = GetSQLiteConnection())

            {

                PrepareCommand(command, connection, cmdText, p);

                return command.ExecuteNonQuery();

            }

        }



        /// <summary>

        /// 返回SqlDataReader物件

        /// </summary>

        /// <param name="cmdText"></param>

        /// <param name="commandParameters">傳入的引數</param>

        /// <returns></returns>

        public static SQLiteDataReader ExecuteReader(string cmdText, params object[] p)

        {

            SQLiteCommand command = new SQLiteCommand();

            SQLiteConnection connection = GetSQLiteConnection();

            try

            {

                PrepareCommand(command, connection, cmdText, p);

                SQLiteDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection);

                return reader;

            }

            catch

            {

                connection.Close();

                throw;

            }

        }



        /// <summary>

        /// 返回結果集中的第一行第一列，忽略其他行或列

        /// </summary>

        /// <param name="cmdText"></param>

        /// <param name="commandParameters">傳入的引數</param>

        /// <returns></returns>

        public static object ExecuteScalar(string cmdText, params object[] p)

        {

            SQLiteCommand cmd = new SQLiteCommand();



            using (SQLiteConnection connection = GetSQLiteConnection())

            {

                PrepareCommand(cmd, connection, cmdText, p);

                return cmd.ExecuteScalar();

            }

        }



        /// <summary>

        /// 分頁

        /// </summary>

        /// <param name="recordCount"></param>

        /// <param name="pageIndex"></param>

        /// <param name="pageSize"></param>

        /// <param name="cmdText"></param>

        /// <param name="countText"></param>

        /// <param name="p"></param>

        /// <returns></returns>

        public static DataSet ExecutePager(ref int recordCount, int pageIndex, int pageSize, string cmdText, string countText, params object[] p)

        {

            if (recordCount < 0)

                recordCount = int.Parse(ExecuteScalar(countText, p).ToString());



            DataSet ds = new DataSet();



            SQLiteCommand command = new SQLiteCommand();

            using (SQLiteConnection connection = GetSQLiteConnection())

            {

                PrepareCommand(command, connection, cmdText, p);

                SQLiteDataAdapter da = new SQLiteDataAdapter(command);

                da.Fill(ds, (pageIndex - 1) * pageSize, pageSize, "result");

            }

            return ds;

        }

    }

}
以上是我根據SqlHelper、OledbHelper類修改而來。