private void LoadProduct()
        {
            try
            {
                ProductBLL productBll=new ProductBLL();
                DataTable dt = productBll.GetActiveProductList();
                drpdwnProduct.DataSource = dt;
                drpdwnProduct.DataTextField = "ProductName";
                drpdwnProduct.DataValueField = "ProductId";
                drpdwnProduct.DataBind();
                drpdwnProduct.Items.Insert(0, "");
                //drpdwnSalesCenterOrWarehouse.SelectedIndex = 0;
                //drpdwnProduct.SelectedValue = LumexSessionManager.Get("UserWareHouseId").ToString();
            }
            catch (Exception ex)
            {

                string message = ex.Message;
                if (ex.InnerException != null) { message += " --> " + ex.InnerException.Message; }
                MyAlertBox("ErrorAlert(\"" + ex.GetType() + "\", \"" + message + "\", \"\");");
            }
        }