相关链接
优点：
可以统一处理所有页面的异常，对所有需要返回json数据的异常，都用同样的方法throw new DVMException（）。页面展示，controller的错误处理方式一样
节省编码时间，不用针对每一个controller编写错误json
throw new DVMException（）可以不仅出现在调用层级更深的其他方法中
编码格式统一
自定义Exception：
???/// <summary> ???/// NewCRM异常 ???/// </summary> ???public class DVMException : Exception ???{ ???????/// <summary> ???????/// 操作结果 ???????/// </summary> ???????public OPResult Result { get; set; } ???????/// <summary> ???????/// 构造函数 ???????/// </summary> ???????/// <param name="opr">操作结果</param> ???????/// <param name="message">消息内容</param> ???????public DVMException(OPResult opr, String message) ???????????: base(message) ???????{ ???????????Result = opr; ???????} ???????/// <summary> ???????/// 构造函数 ???????/// </summary> ???????/// <param name="opr">返回代码</param> ???????/// <param name="message">错误消息</param> ???????/// <param name="e">原始异常</param> ???????public DVMException(OPResult opr, String message, Exception e) ???????????: base(message, e) ???????{ ???????????Result = opr; ???????} ???????/// <summary> ???????/// 构造函数 ???????/// </summary> ???????/// <param name="message">消息内容</param> ???????/// <param name="e">异常栈</param> ???????public DVMException(String message, Exception e) ???????????: base(message, e) ???????{ ???????????Result = OPResult.ServerError; ???????} ???????/// <summary> ???????/// 构造函数 ???????/// </summary> ???????/// <param name="e">异常堆栈</param> ???????public DVMException(Exception e) ???????????: base("Server Operation Failed", e) ???????{ ???????????Result = OPResult.ServerError; ???????} ???} ???/// <summary> ???/// 操作结果 ???/// </summary> ???public class DVMOPResult ???{ ???????/// <summary> ???????/// 操作是否成功 ???????/// </summary> ???????public Boolean OPSucess { get; set; } ???????/// <summary> ???????/// 结果代码 ???????/// </summary> ???????public OPResult OPCode { get; set; } ???????/// <summary> ???????/// 操作结果,类型可变，由Type进行判断 ???????/// </summary> ???????public Object ResultContent { get; set; } ???????/// <summary> ???????/// 返回类型名称 ???????/// </summary> ???????public String Type { get; set; } ???????/// <summary> ???????/// 返回是否为数组 ???????/// </summary> ???????public Boolean IsArray { get; set; } ???}
自定义HandleErrorAttribute
????public class HandleJsonExceptionAttribute:HandleErrorAttribute ???{ ????????public override void OnException(ExceptionContext filterContext) ???????{ ???????????var logger = IocFactory.Instance.GetInstance<ILogBase>(); ???????????var exception = filterContext.Exception; ???????????var url = filterContext.HttpContext.Request.RawUrl; ???????????String message = exception.Message; ???????????logger.Error(String.Format("Request error on url {0}: {1}", url, message), exception); ???????????JsonResult jsonResult = new JsonResult() { MaxJsonLength = Int32.MaxValue }; ???????????jsonResult.Data = message; ???????????filterContext.Result = jsonResult; ???????????filterContext.ExceptionHandled = true; ???????} ???}controller中使用：[HandleJsonException]
???????[HttpPost] ???????[HandleJsonException] ???????public ActionResult Save(SaveAccountRequest request) ???????{ ???????????var accountDTO = request as AccountDTO; ???????????FixRatePost(ref accountDTO); ???????????request.UserId = this.CurrentUser.UserId; ???????????var id =_accountService.SaveAccount(request); ???????????if (id < 0) ???????????{ ???????????????throw new DVMException(OPResult.ServerError, "此账户已存在并启用，无法重复创建"); ???????????} ???????????return new JsonResult { Data = true }; ???????}
View展示异常：ajax的error处理
????????postCreation: function (successMessage) { ???????????????$.ajax({ ???????????????????data: $("form").serialize(), ???????????????????url: "@Url.Content("~/Account/Save")", ???????????????????type: ‘POST‘, ???????????????????dataType: ‘json‘, ???????????????????cache: false, ???????????????????success: function (data) { ???????????????????????if (data.toString() == "true") { ???????????????????????????$.Dialog({ ???????????????????????????????overlay: true, ???????????????????????????????shadow: true, ???????????????????????????????flat: false, ???????????????????????????????icon: ‘‘, ???????????????????????????????width: 330, ???????????????????????????????content: ‘<div class="" style="text-align:left;padding:10px;font-size:16px;">‘ + successMessage + ‘</div>‘ ???????????????????????????????????????+ ‘<div class="size4 text-right">‘ ???????????????????????????????????????????+ ‘<button class="warning" id="comfirm"><i class="icon-checkmark on-left"></i>关闭</button> ‘ ???????????????????????????????????????+ ‘</div>‘, ???????????????????????????????overlayClickClose: false, ???????????????????????????????onShow: function (_dialog) { ???????????????????????????????????$("#comfirm", $(_dialog)).click(function () { ???????????????????????????????????????//保存成功返回列表页 ???????????????????????????????????????$("#cancel").click(); ???????????????????????????????????}) ???????????????????????????????} ???????????????????????????}); ???????????????????????} else { ???????????????????????????showAlert(data); ???????????????????????}; ???????????????????????freezeButton(false); ???????????????????}, ???????????????????error: function (data) { ???????????????????????showAlert(data); ???????????????????????freezeButton(false); ???????????????????} ???????????????}); ???????????}
MVC抛出自定义异常，并易Json方式返回
原文地址：http://www.cnblogs.com/panpanwelcome/p/7660383.html