如何覆盖Web.Config中的HttpErrors部分 - ASP.NET MVC3

Question

我试图按照这个问题的答案添加custon 404页面

ASP.NET MVC 404处理和IIS7 <httpErrors>

通过增加

<httpErrors existingResponse="PassThrough" />

<system.webServer>在我的Web.Config文件中的标记下.

但我得到了以下错误

Module: CustomErrorModule 
Notification: SendResponse 
Handler: System.Web.Mvc.MvcHandler 
Error Code: 0x80070021 
Config Error: This configuration section cannot be used at this path. 
              This happens when the section is locked at a parent level. 
              Locking is either by default (overrideModeDefault="Deny"), 
              or set explicitly by a location tag with overrideMode="Deny" 
              or the legacy allowOverride="false".  


 Config Source
  153:       <httpErrors existingResponse="PassThrough" />
  154:   </system.webServer>

我还尝试根据http://learn.iis.net/page.aspx/145/how-to-use-locking-in-iis-70-configuration(任务2)覆盖锁定

通过在Web.config中添加位置标记

如下

<configuration>
....
....

  <location  allowOverride="true">
        <system.webServer>
            <httpErrors existingResponse="PassThrough" />
        </system.webServer>
  </location>
</configuration>

但我得到了同样的错误.

我应该如何在Web.config中配置httpErrors元素以使其正常工作

我正在使用IIS 7,VS 2010,ASP.NET MVC3

更新:

我能够摆脱锁定的错误

如果我修改applicationHost.config文件并更改

这个

<section name="httpErrors" overrideModeDefault="Deny" />

至

<section name="httpErrors" overrideModeDefault="Allow" />

但理想情况下,我不想更改applicationHost.config文件,并希望从Web.config文件中覆盖它

Answer 1

如果您有兴趣，可以从 Global.asax.cs 创建自定义错误处理：

protected void Application_Error()
        {

                var exc = Server.GetLastError();
                var httpExc = exc as HttpException;
                Response.Clear();
                Server.ClearError();
                var routeData = new RouteData();
                routeData.Values["controller"] = "Error";
                routeData.Values["action"] = "General";
                routeData.Values["exception"] = exc;
                Response.StatusCode = 500;
                if (httpExc != null)
                {
                    Response.StatusCode = httpExc.GetHttpCode();
                    routeData.Values["action"] = "Http404";
                    routeData.Values["exception"] = httpExc;
                }
                Response.TrySkipIisCustomErrors = true;
                IController errorsController = new WWS_Website.Controllers.ErrorController();
                var rc = new RequestContext(new HttpContextWrapper(Context), routeData);
                errorsController.Execute(rc);

        }

控制器：

public ActionResult General(Exception exception)
{
  return View(exception);
}

public ActionResult Http404(Exception exception)
{
  return View(exception);
}

您可以对每个错误有不同的看法。您还可以通过此控制器方法向您的网站管理员电子邮件帐户发送电子邮件 - 非常方便。