public JsonActionResult <Guid> ReceiveCoupons(ReceiveCouponDto receiveCouponDto)
 {
     return(SafeExecute(() =>
     {
         var couponids = CouponService.ReceiveCoupons(receiveCouponDto);
         return couponids.FirstOrDefault();
     }));
 }
 public JsonActionResult <string> ReceiveCouponsWidthCode(ReceiveCouponDto receiveCouponDto)
 {
     return(SafeExecute(() =>
     {
         var couponcodes = this.CouponService.ReceiveCouponsWidthCode(receiveCouponDto);
         return couponcodes.FirstOrDefault();
     }));
 }