在 ASP.NET MVC 中返回 404 时创建自定义错误

Question

我尝试搜索并找到了一些解决方案。我试了一下，但没有运气。大多数公认的解决方案是配置您的Web.config 文件，我试过了，但它仍然返回默认错误页面

<configuration>
<system.web>
<customErrors mode="On">
  <error statusCode="404"
         redirect="~/Error/Error404" />
</customErrors>
</system.web>
</configuration>

还有其他方法可以配置吗？

我不想在 IIS 中配置它

Answer 1

此解决方案不需要更改 web.config 文件或包罗万象的路由。

首先，像这样创建一个控制器；

public class ErrorController : Controller
{
public ActionResult Index()
{
    ViewBag.Title = "Regular Error";
    return View();
}

public ActionResult NotFound404()
{
    ViewBag.Title = "Error 404 - File not Found";
    return View("Index");
}
}

然后在“Views/Error/Index.cshtml”下创建视图为；

 @{
  Layout = "~/Views/Shared/_Layout.cshtml";
 }                     
<p>We're sorry, page you're looking for is, sadly, not here.</p>

然后在 Global asax 文件中添加如下内容：

protected void Application_Error(object sender, EventArgs e)
    {
    // Do whatever you want to do with the error

    //Show the custom error page...
    Server.ClearError(); 
    var routeData = new RouteData();
    routeData.Values["controller"] = "Error";

    if ((Context.Server.GetLastError() is HttpException) && ((Context.Server.GetLastError() as HttpException).GetHttpCode() != 404))
    {
        routeData.Values["action"] = "Index";
    }
    else
    {
        // Handle 404 error and response code
        Response.StatusCode = 404;
        routeData.Values["action"] = "NotFound404";
    } 
    Response.TrySkipIisCustomErrors = true; // If you are using IIS7, have this line
    IController errorsController = new ErrorController();
    HttpContextWrapper wrapper = new HttpContextWrapper(Context);
    var rc = new System.Web.Routing.RequestContext(wrapper, routeData);
    errorsController.Execute(rc);
 }

如果您在执行此操作后仍然收到自定义 IIS 错误页面，请确保在 Web 配置文件中将以下部分注释掉（或为空）：

   <system.web>
    <customErrors mode="Off" />
   </system.web>
   <system.webServer>   
    <httpErrors>     
    </httpErrors>
   </system.webServer>