MVC-AOP(面向切面编程)思想-Filter之IExceptionFilter-异常处理

public void OnException(ExceptionContext filterContext)
        {
            string controller = filterContext.RouteData.Values["Controller"].ToString();
            string action = filterContext.RouteData.Values["Action"].ToString();
            filterContext.Controller.ViewData["ErrorMessage"] = filterContext.Exception.Message; //此处exception是异常类型实例
            //分级:自定义不同的异常类别,完成检测,然后分级处理
            if (filterContext.HttpContext.Request.IsAjaxRequest())  //如果是ajax请求,不能返回html的,要返回json异常信息
            {
                filterContext.Result = new JsonResult() {
                    Data=new { success=0,message="请联系管理员"}
                };
            }
            filterContext.Result = new ViewResult()  //返回html页面
            {
                ViewName = "~/Views/Shared/Error.cshtml", //出错后跳转的页面
                ViewData = filterContext.Controller.ViewData
            };
            filterContext.ExceptionHandled = true; //告诉系统异常已经处理了,不用再处理了
        }