protected void Button4_Click(object sender, EventArgs e)
    {
        Shoping      ac = new Shoping();
        ShopingDatum dm = new ShopingDatum();

        Calcuate();
        dm.Id_Factor   = decimal.Parse(Request.QueryString["Id_Factor"].ToString());
        dm.Discount    = decimal.Parse(TextBoxTakhfif.Text);
        dm.Tasx        = decimal.Parse(TextBox10.Text);
        dm.Send_Price  = decimal.Parse(TextBox11.Text);
        dm.Sum_Price   = decimal.Parse(Label22.Text);
        dm.Description = txtDescription.Text;
        ac.Factor_Update_Takhfif(dm);
        Label19.Visible = true;
    }