Tue, 15 Nov 2005 05:57:00 GMT

　　在MSDN中，.net的数据库�q�接字符串都有详�l�的说明�Q�我�q�里以代码范例的方式�|�列一些，具体的每一��代表的意义可以参看MSDN.
　
ADO.net 中数据库�q�接方式(微��Y提供)
　
微��Y提供了以下四�U�数据库�q�接方式�Q?
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�Q�来依次说明�Q?
　
System.Data.SqlClient.SqlConnection
常用的一些连接字�W�串(C#代码)�Q?
　
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�Q?
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�W�串(C#代码)�Q?
　
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�Q?
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�W�串(C#代码)�Q?
　
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�Q?
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�W�串(C#代码)�Q?
　
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�Q?
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�q�接�Q?
　
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�?NET框架�l�构中的Data Provider中，都提供了隐式的连接池�q�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�q�自动地�q�行事务处理�Q?
Provider=SQLOLEDB;OLE DB Services=-4;Data Source=localhost;Integrated Security=SSPI;
在SQL Server.NET Data Provider中提供了以下参数讄��控制�q�接池的行�ؓ�Q�Connection Lifttime、Connection Reset、Enlist、Max Pool Size、Min Pool Size和Pooling�?

爱饭�?/a> 2005-11-15 13:57 发表评论

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