protected void Button1_Click(object sender, System.EventArgs e)
{
switch (DropDownList1.SelectedValue)
{
case "2":
GridView1.DataSource = admin.orderpay(false);
GridView1.DataBind();
break;
case "3":
GridView1.DataSource = admin.ordership(false);
GridView1.DataBind();
break;
}
}