public static System.Data.SqlClient.SqlConnection Conn;
public static System.Data.SqlClient.SqlDataAdapter Adp;
public static System.Data.DataSet Dst = new System.Data.DataSet();
//form2调用
form1.Conn = new SqlConnection("xxxx");
form1.Adp = new SqlDataAdapter("select *******",form1.Conn);
form1.Adp.Fill(form1.Dst,"table");
DataGrid1.DataSource = form1.Dst.Tables["table"];
DataGrid1.DataBind();