c# - ASP.NET MVC 5 - 错误句柄 - 找不到 404 页面

Question

对于标准错误，我使用解决方案错误句柄(见下面的代码)，我也尝试了 THIS (无效)

Global.asax.cs

 protected void Application_Error(object sender, EventArgs e)
 {
        var exception = Server.GetLastError();

        var httpException = exception as HttpException;
        var routeData = new RouteData();

        routeData.Values.Add("controller", "Error");

        if (httpException == null)
            routeData.Values.Add("action", "Index");
        else //It's an Http Exception, Let's handle it.
            switch (httpException.GetHttpCode())
            {
                case 404:
                    // Page not found.
                    routeData.Values.Add("action", "HttpError404");
                    break;
                case 500:
                    // Server error.
                    routeData.Values.Add("action", "HttpError500");
                    break;

                // Here you can handle Views to other error codes.
                // I choose a General error template  
                default:
                    routeData.Values.Add("action", "General");
                    break;
            }

        // Pass exception details to the target error View.
        routeData.Values.Add("error", exception);

        var request = Request;
        // Pass request details to the target request View.
        routeData.Values.Add("request", request);

        // Clear the error on server.
        Server.ClearError();

        // Avoid IIS7 getting in the middle
        Response.TrySkipIisCustomErrors = true;

        // Call target Controller and pass the routeData.
        IController errorController = new ErrorController();
        errorController.Execute(new RequestContext(
            new HttpContextWrapper(Context), routeData));
}

错误 Controller

public class ErrorController : Controller
{
    private readonly ILog _log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

    // GET: Error
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult HttpError404(string error, HttpRequest request)
    {
        ViewBag.Title = "Page not found (Error 404)";
        ViewBag.Description = error;
        return View("~/Views/Shared/Error.cshtml");
    }

    public ActionResult HttpError500(string error, HttpRequest request)
    {
        ViewBag.Title = "Internal server error (Error 500)";
        ViewBag.Description = error;
        return View("~/Views/Shared/Error.cshtml");
    }

    public ActionResult General(string error, HttpRequest request)
    {
        ViewBag.Title = "Internal server error";

        ViewBag.Description = error;
        return View("~/Views/Shared/Error.cshtml");
    }
}

Error.cshtml

@{
    Layout = "_Layout.cshtml";
}

<div class="row">
    <div class="exceptionmessage col-md-12 text-center">
        <div class="center-block">
            <img src="~/Content/i/404.png" class="img-responsive"/>
        </div>

        <strong>@ViewBag.Message</strong>
        <span class="center-block small text-uppercase">@ViewBag.Main</span>


        <div class="center-block">@Html.ActionLink("Return to the Homepage", "Index", "Home", null, new {@class = "btn btn-primary"})</div>
    </div>
</div>

我有一个目录 Techs ，其中有一些 XML 文件(用于加载数据，比如本地数据库)，并且在 web.config 中使用这个脚本我禁用了访问到这个文件夹并从这个文件夹下载文件(或者当我写不存在的 URL 或类似文件 www.test.com/afsdfgsdfg.pdf)时，我收到 IIS 消息 404 Page not found without redirection to我的自定义错误 404 页面来自下面的错误处理程序代码。

  <system.web>    
    <customErrors mode="On" defaultRedirect="~/Error">
      <error redirect="~/Error/HttpError404" statusCode="404" />
    </customErrors>
  </system.web>

  <system.webServer>    
    <security xdt:Transform="Replace">
      <requestFiltering>
        <hiddenSegments>
          <add segment="Techs" />
        </hiddenSegments>
      </requestFiltering>
    </security>
  </system.webServer>

有没有办法处理所有 404 页面未找到的错误(同一页面而不是两个不同的页面)？

谢谢

编辑:

我将我的 ErrorController 的新路由添加到 RouteConfig.cs 中:

routes.MapRoute("Error",
                "{controller}/{action}/",
                new { controller = "Error", action = "HttpError404" });

之后，我将 web.config 更改为:

<customErrors mode="On" defaultRedirect="~/Error/General">
    <error redirect="~/Error/HttpError404" statusCode="404" />
    <error redirect="~/Error/HttpError500" statusCode="500" />
</customErrors>

<httpErrors errorMode="Custom" existingResponse="Replace">
      <remove statusCode="404" />
      <error
        statusCode="404"
        path="/Error/HttpError404"
        responseMode="ExecuteURL"/>
    </httpErrors>

但它仍然不起作用，我收到了 HTTP Error 404.0 - Not Found 或 HTTP Error 403.14 - Forbidden 和类似的消息，当我写例如:

• web.com/Techs/
• web.com/Techs/catalog.csv
• web.com/Techs.pdf -> 重定向到 404 页面
• web.com/Home/c.pdf

Answer 1

我的有效解决方案

我没有向 RouteConfig.cs 添加任何新路由，仅编辑下面的文件。我在没有参数的情况下调用方法的 Controller ，我受到了不同的对待。 Global.asax.cs 和 ErrorController 使用同上。

Web.config

<system.web>   
    <customErrors mode="On" defaultRedirect="~/Error/General">
      <error redirect="~/Error/HttpError404" statusCode="403" />
      <error redirect="~/Error/HttpError404" statusCode="404" />
      <error redirect="~/Error/HttpError500" statusCode="500" />
    </customErrors>

  </system.web>

  <system.webServer>
    <httpErrors errorMode="Custom" existingResponse="Replace">
      <remove statusCode="403" />
      <remove statusCode="404" />
      <remove statusCode="500" />
      <error
        statusCode="403"
        path="/Error/HttpError404"
        responseMode="ExecuteURL" />
      <error
        statusCode="404"
        path="/Error/HttpError404"
        responseMode="ExecuteURL" />
      <error
        statusCode="500"
        path="/Error/HttpError500"
        responseMode="ExecuteURL" />
    </httpErrors>
  </system.webServer>