SqlConnection myConn=new SqlConnection("DataSource=localhost;Integrated;Security=SSPI;Initial Catalog=Northwind;uid=sa;pwd=");
//----------------------------------------------
Console.WriteLine(myConn.State.ToString());
//----------------------------------------------
Console.WriteLine(myConn.State.ToString());
把
myConn.Open();
改为
try
{myConn.Open();}
catch(System.Data.SqlClient.SqlException err)
{
Console.WriteLine(err.Errors[0].Message);
}
可以看到具体的错误
不过,我认为是你的datasource设置错误,把localhost改为计算机名试一下