Mvc 异常处理 ajax的 和 不是ajax的！

using ImageUpload.Auth;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Mvc;

namespace Web
{
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
    public class HandleAjaxErrorAttribute : FilterAttribute, IExceptionFilter
    {

        public void OnException(ExceptionContext filterContext)
        {

            var errorMsg = filterContext.Exception.Message;
            if (filterContext.HttpContext.Request.IsAjaxRequest())
            {
                filterContext.Result = AjaxError(filterContext.Exception.Message, filterContext);
                filterContext.ExceptionHandled = true;
            }
            else
            {
                Er.G(errorMsg);//把错误存储起来
                filterContext.Result = new RedirectResult("/Home/ErrorMsg/");
                filterContext.ExceptionHandled = true;
            }
        }
        protected JsonResult AjaxError(string message, ExceptionContext filterContext)
        {
            //如果消息是null或空,则充满了通用的消息
            if (String.IsNullOrEmpty(message))
                message = "发生了一些错误在处理您的请求。请刷新页面再试一次.";

            //响应状态代码设置为500
            filterContext.HttpContext.Response.StatusCode = (int)HttpStatusCode.InternalServerError;

            //需要 IIS7.0
            filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;

            return new JsonResult
            {
                //可以扩展更多的属性
                Data = new AjaxExceptionModel() { ErrorMessage = message },
                ContentEncoding = System.Text.Encoding.UTF8,
                JsonRequestBehavior = JsonRequestBehavior.DenyGet
            };
        }
    }
    public class AjaxExceptionModel
    {
        public string ErrorMessage { get; set; }
    }
}

 Er 类用来存储错误信息 然后前台调用

    public static class Er
    {
        public static  string Msg { get; set; }
      /// <summary>
        /// 将错误信息存起来
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string G(string s)
        {
            Msg = s;
            return Msg;
        }
        /// <summary>
        /// 读取错误信息
        /// </summary>
        /// <returns></returns>
        public static string P()
        {
            return Msg;
        }
        
    }

创建一个ErrorMsg控制器 和  视图 

  public ActionResult ErrorMsg()
        {
            string ss = Er.P();
            ViewBag.msg = Er.P();
            return View();
        }

视图

@{
    ViewBag.Title = "";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<div id="div" style="display:none">
    <h2>@ViewBag.msg </h2>
    <h3><a href="/Home/Index">返回首页</a></h3>
    <p>给您造成影响，再次向您表示道歉！</p>
</div>


@section scripts
{
    <script>

    @if (ViewBag.msg!=null)
        {
            <text>
        swal(
            {
                title: "错误?",
                text: "@ViewBag.msg!",
                type: "error",
                showCancelButton: true,
                confirmButtonColor: "#DD6B55",
                confirmButtonText: "跳到首页",
                cancelButtonText: "不",
                closeOnConfirm: false,
                closeOnCancel: false,
                allowOutsideClick:true
            },
            function (isConfirm) {
                if (isConfirm) {
                    window.location.href = "/Home/Index";
                    swal("请等待!", "正在跳转。。。", "success");
                } else {
                    swal(
                        {
                            title: "取消",
                            text: "您取消了跳转.",
                            type: "warning",
                            confirmButtonText:"确定",
                            timer: 500
                        });
                    $("#div").show(2000);
                }
            });
        </text>
        }


    </script>
}

视图用到了sweetalert  弹窗插件

下面是ajax的全局错误处理

创建一个 MyJs 的js文件

$(document).ajaxError(function (event, xhr, options, exc) {
    if (xhr.responseText != "") {
        var jsonValue = jQuery.parseJSON(xhr.responseText);
        console.log(jsonValue.ErrorMessage);
        swal(
             {
                 title: "错误",
                 text: jsonValue.ErrorMessage,
                 type: "warning",
                 confirmButtonText: "确定",
             });
    }
})