private void popddlSupplier()
 {
     try
     {
         DataTable dt = stock.GetSupplier();
         DataRow   dr = dt.NewRow();
         dr["ID"]            = "-1";
         dr["SUPPLIER_NAME"] = "Select";
         dt.Rows.InsertAt(dr, 0);
         ddlSupplier.DataTextField  = "SUPPLIER_NAME";
         ddlSupplier.DataValueField = "ID";
         ddlSupplier.DataSource     = dt;
         ddlSupplier.DataBind();
     }
     catch (Exception ex)
     {
         logger.Error(MODULE_NAME, "popddlStock", ex);
     }
 }