c#中数据库字符串的连接几种方式

ADO.net 中数据库连接方式(微软提供)

微软提供了以下四种数据库连接方式：System.Data.OleDb.OleDbConnectionSystem.Data.SqlClient.SqlConnectionSystem.Data.Odbc.OdbcConnectionSystem.Data.OracleClient.OracleConnection下面我们以范例的方式，来依次说明：

System.Data.SqlClient.SqlConnection常用的一些连接字符串(C#代码)：

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  = newSystem.Data.SqlClient.SqlConnection("Persist Security Info=False;IntegratedSecurity=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");

更多字符串连接说明请看MSDN：http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemDataSqlClientSqlConnectionClassConnectionStringTopic.asp

System.Data.OleDb.OleDbConnection常用的一些连接字符串(C#代码)：

OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\MyWeb\81\05\GrocerToGo.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:\bin\LocalAccess40.mdb");

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

更多字符串连接说明请看MSDN：http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemDataOleDbOleDbConnectionClassConnectionStringTopic.asp?frame=true

System.Data.OracleClient.OracleConnection常用的一些连接字符串(C#代码)：

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

 

更多字符串连接说明请看MSDN：http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemDataOracleClientOracleConnectionClassConnectionStringTopic.asp?frame=true

System.Data.Odbc.OdbcConnection常用的一些连接字符串(C#代码)：

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:\bin\nwind.mdb");

OdbcConnection conn = new OdbcConnection("Driver={Microsoft Excel Driver (*.xls)};DBQ=c:\bin\book1.xls");

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

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

更多字符串连接说明请看MSDN：http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemDataOdbcOdbcConnectionClassConnectionStringTopic.asp?frame=true

其他厂商提供的数据库连接：

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

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

BdpConnection myConn = new Borland.Data.Provider.BdpConnection("assembly=Borland.Data.Mssql,Version=1.1.0.0,Culture=neutral,PublicKeyToken=91d62ebb5b0d1b1b;vendorclient=sqloledb.dll;osauthentication=False;database=<database>;username=<user>;hostname=<host>;password=<password>;provider=MSSQL");

BdpConnection myConn = new Borland.Data.Provider.BdpConnection("assembly=Borland.Data.Db2,Version=1.1.0.0,Culture=neutral,PublicKeyToken=91d62ebb5b0d1b1b;vendorclient=db2cli.dll;database=<database>;username=<user>;password=<password>;provider=DB2");

Connection Pooling

在SQL Server、OLE DB和.NET框架结构中的Data Provider中，都提供了隐式的连接池连接支持。你可以在ConnectionString中指定不同的参数值控制连接池的行为。比如下面的例子使OLE DB的连接池无效并自动地进行事务处理：Provider=SQLOLEDB;OLE DB Services=-4;Data Source=localhost;Integrated Security=SSPI;在SQL Server.NET Data Provider中提供了以下参数设置控制连接池的行为：Connection Lifttime、Connection Reset、Enlist、Max Pool Size、Min Pool Size和Pooling。

更多数据库连接信息，以及非ADO.net的连接字符串可以参看：http://www.connectionstrings.com/