private bool DoEdit(int _id)
        {
            bool result = true;

            BLL.car_return_recordbll    bll   = new BLL.car_return_recordbll();
            Model.car_return_recordinfo model = bll.GetModel(_id);

            model.Code        = txtCode.Text.Trim();
            model.Car_Number  = ddlCar_Number.SelectedValue;
            model.Return_Time = txtReturn_Time.Text;
            model.Source_Code = ddlSource_Code.SelectedValue;
            string s = txtKilometer.Text;

            model.Kilometer = Convert.ToInt32(s.Trim() == "" ? "0" : s);
            s = txtUser_Time_Number.Text;
            model.User_Time_Number = Convert.ToInt32(s.Trim() == "" ? "0" : s);
            s = txtMileage_End.Text;
            model.Mileage_End = Convert.ToInt32(s.Trim() == "" ? "0" : s);
            s                = txtCost.Text;
            model.Cost       = decimal.Parse(s.Trim() == "" ? "0" : s);
            s                = txtBridgeCost.Text;
            model.BridgeCost = decimal.Parse(s.Trim() == "" ? "0" : s);

            if (!bll.Update(model))
            {
                result = false;
            }
            return(result);
        }