通过SqlDataSource返回的DataSet

    string ConnectionString = "Server=localhost;Integrated Security=True;Database=Northwind;User=****;password=****;"; 

        string QueryString = "SELECT * FROM [Employees]"; 

        System.Web.UI.WebControls.SqlDataSource SqlDataSource = new System.Web.UI.WebControls.SqlDataSource(); 

        SqlDataSource.ConnectionString = ConnectionString; 

        SqlDataSource.SelectCommand = QueryString; 



        DataSourceSelectArguments arg = new DataSourceSelectArguments();

        System.Data.DataView dv = (System.Data.DataView)SqlDataSource.Select(arg);

//这样可以得到DataView 
System.Data.DataView dv = (System.Data.DataView)SqlDataSource1.Select(DataSourceSelectArguments.Empty);