.net mvc 自定义错误页面

1、Global.asax.cs中，加入如下代码

protected void Application_Error(Object sender, EventArgs e)
        {
            Exception exception = Server.GetLastError();
            if (exception != null)
            {
                HttpException httpException = exception as HttpException;
                if (httpException != null)
                {
                    int errorCode = httpException.GetHttpCode();
                    if (errorCode == 400 || errorCode == 404)
                    {
                        Response.StatusCode = 404;
                        Response.Redirect(string.Format("~/ErrorPage/Index/404"), true);
                        Server.ClearError();
                        return;
                    }
                }

                var postData = string.Empty;
                try
                {
                    using (System.IO.Stream stream = Request.InputStream)
                    {
                        using (System.IO.StreamReader streamReader = new System.IO.StreamReader(stream, System.Text.Encoding.UTF8))
                        {
                            postData = streamReader.ReadToEnd();
                        }
                    }
                }
                catch { }

                //此处可写日志

                Response.StatusCode = 500;
                Response.Redirect(string.Format("~/ErrorPage/Index/500"), true);
                Server.ClearError();
            }
        }

　　2、新建控制器

public class ErrorPageController : Controller
    {
        //
        // GET: /ErrorPage/

        public ActionResult Index(int id)
        {
            ViewBag.ErrorCode = id;

            return View();
        }

    }

　　3、路由要有如下的路由，保证能正确找到方法，只要保证能正确找到方法，路由并无限制

routes.MapRoute(
                name: "Default6",
                url: "{controller}/{action}/{id}",
                defaults: new { culture = cul, controller = "Home", action = "Index", id = UrlParameter.Optional },
                namespaces: new string[] { "AiAn.GPS.Web.Controllers" }
            );

　　4、根目录下的web.config 设置customError为off 一般默认为off

<customErrors mode="Off">
    </customErrors>

　　5、注释filterConfig.cs中的系统错误处理代码

public static void RegisterGlobalFilters(GlobalFilterCollection filters)
		{
            //filters.Add(new HandleErrorAttribute());
        }