AW.Portal.Checkout.btn_Checkout_Click C# (CSharp) Метод

        protected void btn_Checkout_Click(object sender, EventArgs e)
        {
            string abc = "";
               // Response.Redirect("Checkout.aspx");
            int customerid = Convert.ToInt32(Session["customerid"].ToString());

            EntityManager<ShippingAddress> pcat = new EntityManager<ShippingAddress>();
            ShippingAddress procat = new ShippingAddress();
            procat.CustomerID = customerid;
            List<ShippingAddress> prodcatID = pcat.Search(procat);
            if (prodcatID.Count != 0)
            {
                abc = prodcatID[0].AddressLine1;
            }
            if (abc == "")
            {
                addressedit.Visible = true;
            }
            else
            {

                addressview.Visible = true;
            }
            btnfindis.Visible = true;
            btn_Checkout.Visible = false;
        }