asp.net mvc输出自定义404等错误页面，非302跳转。
asp.net mvc输出自定义404等错误页面，非302跳转。
旺财的城堡
发布于 2018-11-20 15:53:01
发布于 2018-11-20 15:53:01
朋友问到一个问题，如何输出自定义错误页面，不使用302跳转。当前页面地址不能改变.
还要执行一些代码等,生成一些错误信息,方便用户提交反馈.
500错误，mvc框架已经有现成解决方法：
filters.Add(new HandleErrorAttribute());404错误目前想到的解决方法：
先上代码 Global.asax：
1 protected void Application_Error(object sender, EventArgs e)
2 {
3 var ex = Server.GetLastError() as HttpException;
4 if (ex == null)
5 return;
6
7 var httpStatusCode = ex.GetHttpCode();
8
9 if (httpStatusCode == 404)
10 {
11 var httpContext = (sender as MvcApplication).Context;
12
13 httpContext.ClearError();
14 httpContext.Response.Clear();
15 httpContext.Response.StatusCode = 404;
16 ServiceFocus.LogService.AddLog(ex);
17
18 httpContext.Response.ContentType = "text/html; charset=utf-8";
19 var routeData = new RouteData();
20 routeData.Values["controller"] = "Sys";
21 routeData.Values["action"] = "NotFound";
22 var requestContext = new RequestContext(new HttpContextWrapper(httpContext), routeData);
23 var controller = ControllerBuilder.Current.GetControllerFactory().CreateController(requestContext, "Sys") as SysController;
24 //controller.ViewData.Model=model;
25 (controller as IController).Execute(requestContext);
26 ControllerBuilder.Current.GetControllerFactory().ReleaseController(controller);
27 }
28 }controller代码： 1 public class CompressAttribute : ActionFilterAttribute
2 {
3 public override void OnActionExecuting(ActionExecutingContext filterContext)
4 {
5 var acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
6 if (!string.IsNullOrEmpty(acceptEncoding))
7 {
8 acceptEncoding = acceptEncoding.ToLower();
9 var response = filterContext.HttpContext.Response;
10 if (acceptEncoding.Contains("gzip"))
11 {
12 response.AppendHeader("Content-encoding", "gzip");
13 response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
14 }
15 else if (acceptEncoding.Contains("deflate"))
16 {
17 response.AppendHeader("Content-encoding", "deflate");
18 response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
19 }
20 }
21 }
22 }
23 [Compress]
24 public class SysController : Controller
25 {
26 //
27 // GET: /sys/
28
29 public ActionResult NotFound()
30 {
31 return View();
32 }
33 public ActionResult Error()
34 {
35 return View();
36 }
37 }web.config
<system.webServer>
<httpErrors errorMode="Detailed" />目前有几个疑惑，没有深究：还望有网友知道能解惑一二，就不用去google 扒源码了。
1.如果不加这行代码，默认输出的是：text/html; 浏览器直接输出内容,不做解析.
httpContext.Response.ContentType = "text/html; charset=utf-8";2.iis不会使用gzip压缩,不管输出的404错误页面有多大,都不会自动压缩.所以使用下面这种替换方式.
[Compress]
public class SysController : Controller猜测:
mvc 在action的Execute阶段后 还做了不少事情,比如上面提到的1,2点.正常200请求会执行默认的filter等阶段.
而当是404请求时,跳过了这些阶段.可能500请求也类似.
仅仅是猜测,还未验证,
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原始发表：2014-07-20 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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