C# 错误捕捉

     if (!ModelState.IsValid)

         {

            List<string> sb = new

       List<string>();

              //获取所有错误的Key  

            List<string> Keys = ModelState.Keys.ToList();

              //获取每一个key对应的ModelStateDictionary  

                foreach (var key in Keys)

                {

                   var errors = ModelState[key].Errors.ToList();

                  //将错误描述添加到sb中  

                    foreach (var error in errors)

                  {

                       sb.Add(error.ErrorMessage);

                }

             }

               return Json(sb);

           }