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System.Data.SqlClient.SqlException: 链接服务器 "(null)" 的 OLE DB 访问接口 ...

left join opendatasource('SQLOLEDB','Data Source=192.168.0.3;User ID=username;Password=userpsd').dbname.dbo.detailtable _b on _a.id=_b.fatherid left join ...
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关于连接不能成功的问题（System.Data.SqlClient.SqlException: SQL Server 不 ...

sqlConnection1.ConnectionString = "data source=Devmain;initial catalog=Northwind;persist security info=True;user id=sa;workstation id=WANGHW;packet size=4096;PWD ...