ASP.NET MVC 统一日志处理 让你的应用不再出现小黄页!_.NET_编程开发_程序员俱乐部

引言

异常处理是每一个系统都必要有的功能,在程序出错的时候不会给用户显示莫名其妙的页面,或暴露你的代码的堆栈信息!那么在ASP.NET MVC 如何正确处理异常并记录呢? 

答案是可以利用ASP.NET MVC Filter(筛选器)利用AOP的方式 进行全局异常捕获 自定义ExceptionFilter 

正文

废话不多说直接上源码

 在ASP.NET MVC 根目录新建个文件夹 命名为 Filter

在Filter新建一个Class类 命名为CustomExceptionAttribute,并让它继承FilterAttribute类和IExceptionFilter接口

如下

下面是代码

 代码思想为   

/// <summary>
    /// 系统集中异常处理
    /// 重写官方默认的HandleErrorAttribute处理
    /// </summary>
    public class CustomExceptionAttribute : FilterAttribute, IExceptionFilter
    {

        public void OnException(ExceptionContext filterContext)
        {
            //查看是否已处理异常 
            if (filterContext.ExceptionHandled == true)
            {
                //已处理 直接跳过
                return;
            }
            else
            {
                //记录日志
                var log = new ExceptionLogModel();
                log.ControllerName = (string)filterContext.RouteData.Values["controller"];//控制器名称
                log.ActionName = (string)filterContext.RouteData.Values["action"];       //操作名称
                log.LoginUser = "临时测试用户";                                            //异常操作的用户
                log.Url = filterContext.RequestContext.HttpContext.Request.Url.LocalPath; //异常发生的url
                log.LogLevel = LogLevel.Error;                                            //异常类型
                log.Source = filterContext.Exception.Source;                              //引发异常的对象
                log.ErrorMsg = filterContext.Exception.Message;                           //异常详情信息
                log.StackTrace = filterContext.Exception.StackTrace;                       //异常堆栈信息
                log.ExceptionLog();
            }

            //查看是否通过异步请求
            bool AjaxReq = filterContext.HttpContext.Request.IsAjaxRequest();
             
            //根据http状态码 跳转到指定的异常页面
            var httpException = new HttpException(null, filterContext.Exception);
            switch (httpException.GetHttpCode())
            {
                case 400:
                    if (!AjaxReq)
                    {
                        ViewResult result = new ViewResult
                        {
                            ViewName = "Page_400", //错误页
                            MasterName = null,     //指定母版页
                            ViewData = null,       //指定模型
                            TempData = filterContext.Controller.TempData
                        };

                        filterContext.Result = result;
                        filterContext.HttpContext.Response.Clear();
                        filterContext.HttpContext.Response.StatusCode = 400;
                    }
                    else
                    {
                        filterContext.Result = new HttpStatusCodeResult(System.Net.HttpStatusCode.BadRequest, filterContext.Exception.Message);
                    }
                    break;

                case 401:
                    if (!AjaxReq)
                    {
                        ViewResult result = new ViewResult
                        {
                            ViewName = "Page_401", //错误页
                            MasterName = null,     //指定母版页
                            ViewData = null,       //指定模型
                            TempData = filterContext.Controller.TempData
                        };

                        filterContext.Result = result;
                        filterContext.HttpContext.Response.Clear();
                        filterContext.HttpContext.Response.StatusCode = 401;
                    }
                    else
                    {
                        filterContext.Result = new HttpStatusCodeResult(System.Net.HttpStatusCode.Unauthorized, "You Must login to perform this operation");
                    }
                    break;

                case 403:
                    if (!AjaxReq)
                    {
                        ViewResult result = new ViewResult
                        {
                            ViewName = "Page_403", //错误页
                            MasterName = null,     //指定母版页
                            ViewData = null,       //指定模型
                            TempData = filterContext.Controller.TempData
                        };

                        filterContext.Result = result;
                        filterContext.HttpContext.Response.Clear();
                        filterContext.HttpContext.Response.StatusCode = 403;
                    }
                    else
                    {
                        filterContext.Result = new HttpStatusCodeResult(System.Net.HttpStatusCode.Forbidden, "You do not have permission to access this operation");
                    }

                    break;

                case 404:
                    if (!AjaxReq)
                    {
                        ViewResult result = new ViewResult
                        {
                            ViewName = "Page_404", //错误页
                            MasterName = null,     //指定母版页
                            ViewData = null,       //指定模型
                            TempData = filterContext.Controller.TempData //临时数据
                        };

                        filterContext.Result = result;
                        filterContext.HttpContext.Response.Clear();
                        filterContext.HttpContext.Response.StatusCode = 404;
                    }
                    else
                    {
                        filterContext.Result = new HttpStatusCodeResult(System.Net.HttpStatusCode.NotFound, "The requested resource was not found");
                    }

                    break;

                case 500:
                    if (!AjaxReq)
                    {
                        ViewResult result = new ViewResult
                        {
                            ViewName = "Page_500", //错误页
                            MasterName = null,     //指定母版页
                            ViewData = null,       //指定模型
                            TempData = filterContext.Controller.TempData
                        };

                        filterContext.Result = result;
                        filterContext.HttpContext.Response.Clear();
                        filterContext.HttpContext.Response.StatusCode = 500;
                    }
                    else
                    {
                        filterContext.Result = new HttpStatusCodeResult(System.Net.HttpStatusCode.InternalServerError, filterContext.Exception.Message);
                    }

                    break;

                default:
                    if (!AjaxReq)
                    {
                        ViewResult result = new ViewResult
                        {
                            ViewName = "Page_500", //错误页
                            MasterName = null,     //指定母版页
                            ViewData = null,       //指定模型
                            TempData = filterContext.Controller.TempData
                        };

                        filterContext.Result = result;
                        filterContext.HttpContext.Response.Clear();
                        filterContext.HttpContext.Response.StatusCode = 500;
                    }
                    else
                    {
                        filterContext.Result = new HttpStatusCodeResult(System.Net.HttpStatusCode.InternalServerError, filterContext.Exception.Message);
                    }

                    break;

            }

            //设置异常已经处理,否则会被其他异常过滤器覆盖
            filterContext.ExceptionHandled = true;
            //在派生类中重写时，获取或设置一个值，该值指定是否禁用IIS自定义错误。
            filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
        }

最后在MVC项目根目录下 App_Start文件的FilterConfig.CS文件下 修改内容

 完毕 现在你控制器所有异常 都会被捕获