public async Task <IActionResult> Delete(int id) { JsonModel json = new JsonModel() { Code = 200, Msg = "保存成功!" }; try { await _bannerService.DeleteBannerByIdAsync(id); } catch (Exception ex) { json.Code = 500; json.Msg = $"保存异常!{ex.Message}"; return(Json(json)); } return(Json(json)); }