MVC抛出自定义异常,并易Json方式返回
Posted 晴天彩虹
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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; } }
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); } }); }
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