返回404错误ASP.NET MVC 3 [英] Returning 404 Error ASP.NET MVC 3

问题描述

我曾尝试以下两件事情有一个页面返回404错误：

I have tried the following 2 things to have a page return a 404 error:

public ActionResult Index()
{
    return new HttpStatusCodeResult(404);
}

public ActionResult NotFound()
{
    return HttpNotFound();
}

但他们两人只是呈现一个空白页。如何我手动从ASP.NET MVC 3？

but both of them just render a blank page. How can I manually return a 404 error from within ASP.NET MVC 3?

推荐答案

如果您使用招检查响应，我相信你会发现空白页，其实是返回404状态code。问题是没有被渲染视图，从而空白页。

If you inspect the response using fiddler, I believe you'll find that the blank page is in fact returning a 404 status code. The problem is no view is being rendered and thus the blank page.

您可以获取要通过添加的customErrors元素，你的web.config，而不是显示实际的观点，即当将一定地位code发生然后你就可以处理，你会与将用户重定向到一个特定的网址任何URL。这里有一个步行通过如下：

You could get an actual view to be displayed instead by adding a customErrors element to your web.config that will redirect the user to a specific url when a certain status code occurs which you can then handle as you would with any url. Here's a walk-through below:

首先抛出 HttpException 适用。当实例化异常，一定要使用这需要一个HTTP状态code像下面的参数重载之一。

First throw the HttpException where applicable. When instantiating the exception, be sure to use one of the overloads which takes a http status code as a parameter like below.

throw new HttpException(404, "NotFound");

然后在你的web.config文件中添加自定义错误处理程序，以便你能确定何时上述异常发生什么看法应该呈现。下面是下面一个例子：

Then add an custom error handler in your web.config file so that you could determine what view should be rendered when the above exception occurs. Here's an example below:

<configuration>
    <system.web>
        <customErrors mode="On">
          <error statusCode="404" redirect="~/404"/>
        </customErrors>
    </system.web>
</configuration>

现在添加在Global.asax中的路由条目会处理的URL404，这将请求传递给控制器​​的作用是将显示你的404页查看。

Now add a route entry in your Global.asax that'll handle the url "404" which will pass the request to a controller's action that'll display the View for your 404 page.

Global.asax中

Global.asax

routes.MapRoute(
    "404", 
    "404", 
    new { controller = "Commons", action = "HttpStatus404" }
);

CommonsController

CommonsController

public ActionResult HttpStatus404()
{
    return View();
}

所有剩下的就是增加一个视图上述操作。

All that's left is to add a view for the above action.

一个需要注意上面的方法：据C＃2010 Pro的ASP.NET 4（A preSS）使用的 是如果你使用IIS 7相反，你应该使用的 httpErrors 部分。下面是从书中报价：

One caveat with the above method: according to the book "Pro ASP.NET 4 in C# 2010" (Apress) the use of customErrors is outdated if you're using IIS 7. Instead you should use the httpErrors section. Here's a quote from the book:

不过，尽管这个设置还是使用Visual Studio的内置测试网络工程
  服务器，它有效地取代了＆LT; httpErrors方式＆gt; 在IIS 7.x的部分。

But although this setting still works with Visual Studio’s built-in test web server, it’s effectively been replaced by the <httpErrors> section in IIS 7.x.

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