public void dept_bind()
 {
     DropDownList1.DataSource     = bs.bs_dept_grid();
     DropDownList1.DataTextField  = "deptname";
     DropDownList1.DataValueField = "deptid";
     DropDownList1.DataBind();
 }
 public void dept_grid()
 {
     Button1.Visible      = true;
     Button2.Visible      = false;
     GridView1.DataSource = bs.bs_dept_grid();
     GridView1.DataBind();
 }