ASPNET中連線字串

ASPNET中連線字串

在MSDN中，.net的資料庫連線字串都有詳細的說明，我這裡以程式碼範例的方式羅列一些，具體的每一項代表的意義可以參看MSDN.

ADO.net 中資料庫連線方式(微軟提供)

微軟提供了以下四種資料庫連線方式：
System.Data.OleDb.OleDbConnection
System.Data.SqlClient.SqlConnection
System.Data.Odbc.OdbcConnection
System.Data.OracleClient.OracleConnection
下面我們以範例的方式，來依次說明：

System.Data.SqlClient.SqlConnection
常用的一些連線字串(C#程式碼)：

SqlConnection conn
= new SqlConnection( "Server=(local);Integrated Security=SSPI;database=Pubs");

SqlConnection conn
= new SqlConnection("server=(local)NetSDK;database=pubs;Integrated Security=SSPI");

SqlConnection conn = new SqlConnection(
"Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;");

SqlConnection conn = new SqlConnection(
" data source=(local);initial catalog=xr;integrated security=SSPI;
persist security info=False;workstation id=XURUI;packet size=4096; ");

SqlConnection myConn = new
System.Data.SqlClient.SqlConnection("Persist Security Info=False;Integrated
Security=SSPI;database=northwind;server=mySQLServer");

SqlConnection conn = new SqlConnection(
" uid=sa;pwd=passwords;initial catalog=pubs;data source=127.0.0.1;Connect Timeout=900");

更多字串連線說明請看MSDN：

System.Data.OleDb.OleDbConnection
常用的一些連線字串(C#程式碼)：

OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:MyWeb815GrocerToGo.mdb");

OleDbConnection conn = new OleDbConnection(
@"Provider=Microsoft.Jet.OLEDB.4.0;Password=;
User ID=Admin;Data Source=grocertogo.mdb;");

OleDbConnection conn = new OleDbConnection(
"Provider=MSDAORA; Data Source=ORACLE8i7;Persist Security Info=False;Integrated Security=yes");

OleDbConnection conn = new OleDbConnection(
"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=c:binLocalAccess40.mdb");

OleDbConnection conn = new OleDbConnection(
"Provider=SQLOLEDB;Data Source=MySQLServer;Integrated Security=SSPI");

更多字串連線說明請看MSDN：

System.Data.OracleClient.OracleConnection
常用的一些連線字串(C#程式碼)：

OracleConnection myConn = new System.Data.OracleClient.OracleConnection(
"Data Source=Oracle8i;Integrated Security=yes");

更多字串連線說明請看MSDN：

System.Data.Odbc.OdbcConnection
常用的一些連線字串(C#程式碼)：

OdbcConnection conn = new OdbcConnection(
"Driver={SQL Server};Server=MyServer;Trusted_Connection=yes;Database=Northwind;");

OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft ODBC for Oracle};Server=ORACLE8i7;
Persist Security Info=False;Trusted_Connection=yes");

OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft Access Driver (*.mdb)};DBQ=c:binnwind.mdb");

OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft Excel Driver (*.xls)};DBQ=c:binbook1.xls");

OdbcConnection conn = new OdbcConnection(
"Driver={Microsoft Text Driver (*.txt; *.csv)};DBQ=c:bin");

OdbcConnection conn = new OdbcConnection("DSN=dsnname");

更多字串連線說明請看MSDN：

其他廠商提供的資料庫連線：

DB2Connection myConn = new IBM.Data.DB2.DB2Connection(
"DATABASE = SAMPLE;UID=; PWD=;");

DB2Connection myConn = new IBM.Data.DB2.DB2Connection("DATABASE = SAMPLE");

BdpConnection myConn = new Borland.Data.Provider.BdpConnection("assembly=Borl
and.Data.Mssql,Version=1.1.0.0,Culture=neutral,PublicKeyToken=91d62ebb5b0d1b1b;ve
ndorclient=sqloledb.dll;osauthentication=False;database=;usernam
e=;hostname=;password=;provider=MSSQL");

BdpConnection myConn = new Borland.Data.Provider.BdpConnection("assembly=Borl
and.Data.Db2,Version=1.1.0.0,Culture=neutral,PublicKeyToken=91d62ebb5b0d1b1b;ve
ndorclient=db2cli.dll;database=;username=;
password=;provider=DB2");

Connection Pooling

在SQL Server、OLE DB和.NET框架結構中的Data Provider中，都提供了隱式的連線池連線支援。你可以在ConnectionString中指定不同的引數值控制連線池的行為。比如下面的例子使OLE DB的連線池無效並自動地進行事務處理：
Provider=SQLOLEDB;OLE DB Services=-4;Data Source=localhost;Integrated Security=SSPI;
在SQL Server.NET Data Provider中提供了以下引數設定控制連線池的行為：Connection Lifttime、Connection Reset、Enlist、Max Pool Size、Min Pool Size和Pooling。

更多資料庫連線資訊，以及非ADO.net的連線字串可以參看：

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