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ADO.net中数据库连接方式 RRS feed

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  • 在MSDN中,.net的数据库连接字符串都有详细的说明,我这里以代码范例的方式罗列一些,具体的每一项代表的意义可以参看MSDN.

    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.OleDbConnection
    System.Data.SqlClient.SqlConnection
    System.Data.Odbc.OdbcConnection
    System.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  = 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=Borl
    and.Data.Mssql,Version=1.1.0.0,Culture=neutral,PublicKeyToken=91d62ebb5b0d1b1b;ve
    ndorclient=sqloledb.dll;osauthentication=False;database=<database>;usernam
    e=<user>;hostname=<host>;password=<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=<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/


    资料引用:http://www.knowsky.com/4168.html

    2009年5月27日 7:09