protected void btnCheckDelivery_Click(object sender, EventArgs e)
    {
        try
        {
            string country  = ddCountry.SelectedValue;
            string state    = ddState.SelectedValue;
            string postcode = txtPostcodezip.Text;
            int    result   = 0;

            if (local_product.IsExistsPostCode(postcode, "N", "") == "F")
            {
                result = local_product.AddPostcodeDelivery(country, state, postcode);
                if (result != 0)
                {
                    lblMessage.ForeColor = Color.Green;
                    lblMessage.Text      = "Delivery postcode added successfully!";
                    txtPostcodezip.Text  = "";
                    BindDeliveryPostcode();
                }
            }
            else
            {
                lblMessage.ForeColor = Color.Red;
                lblMessage.Text      = "Postcode already exists!";
            }
        }
        catch (Exception ex)
        {
            lblMessage.ForeColor = Color.Red;
            lblMessage.Text      = ex.Message;
        }
    }