protected void Page_Load(object sender, EventArgs e) { if (Session["sign"].ToString() == "") { Response.Redirect("~/LoginNew.aspx"); } if (!IsPostBack) { PoNo(); //BindGrid(); DropDownList1.DataSource = StoreBusinessLogic.ListSupp(); DropDownList1.DataTextField = "SuppCode"; DropDownList1.DataValueField = "SuppCode"; DropDownList1.DataBind(); } Boolean results = empauthentication.ClerkAuthentication(Session["sign"].ToString()); if (results == false) { Response.Redirect("~/LoginNew.aspx"); } }