抛出 HttpException 总是会发回 HTTP 500 错误？

我试图向客户端返回 HTTP 403 错误代码。我读过 HttpException 是完成此任务的最干净的方法，但它对我不起作用。我从这样的页面中抛出异常：

throw new HttpException(403,"You must be logged in to access this resource.");

但是，当 CustomErrors 关闭时，这只会提供标准的 ASP.Net 堆栈跟踪（带有 500 错误）。如果 CustomErrors 已打开，则不会重定向到我设置的在发生 403 错误时显示的页面。我应该忘记 HttpException 而自己设置所有 HTTP 代码吗？我该如何解决？

我的 Web.Config 的自定义错误部分是这样的：

<customErrors mode="On" defaultRedirect="GenericErrorPage.html">
      <error statusCode="403" redirect="Forbidden.html" />
</customErrors>

我将得到 GenericErrorPage.html，而不是 Forbidden.html

您需要像这样覆盖应用程序错误：

    protected void Application_Error()
    {
        var exception = Server.GetLastError();
        var httpException = exception as HttpException;
        Response.Clear();
        Server.ClearError();
        
        var routeData = new RouteData();
        routeData.Values["controller"] = "Errors";
        routeData.Values["action"] = "General";
        routeData.Values["exception"] = exception;
        Response.StatusCode = 500;

        if (httpException != null)
        {
            Response.StatusCode = httpException.GetHttpCode();
            switch (Response.StatusCode)
            {
                case 403:
                    routeData.Values["action"] = "Http403";
                    break;
                case 404:
                    routeData.Values["action"] = "Http404";
                    break;
            }
        }

        IController errorsController = new ErrorsController();
        var rc = new RequestContext(new HttpContextWrapper(Context), routeData);
        errorsController.Execute(rc);
    }

然后你必须添加错误控制器：

public class ErrorsController : Controller
{
    public ActionResult General(Exception exception)
    {
        ViewBag.ErrorCode = Response.StatusCode;
        ViewBag.Message = "Error Happened";

        //you should log your exception here

        return View("Index");
    }

    public ActionResult Http404()
    {
        ViewBag.ErrorCode = Response.StatusCode;
        ViewBag.Message = "Not Found";
        return View("Index");
    }

    public ActionResult Http403()
    {
        ViewBag.Message = Response.StatusCode;
        ViewBag.Message = "Forbidden";
        return View("Index");
    }

}

最后在错误控制器中创建一个视图。我只在 Views/Errors/ 中创建了一个名为 index 的视图。