ASP.NET 发送异常消息

Question

我正在开发 Web 应用程序，这是我处理异常的方式：

void Application_Error(object sender, EventArgs e)
{
    Exception ex = Server.GetLastError();
    LogManager.GetCurrentClassLogger().Error(ex);
    Response.Clear();
    Server.ClearError();

    HttpException httpEx = ex as HttpException;

    if (httpEx == null)
        httpEx = new HttpException(400, ex.Message, ex);

    RouteData routeData = new RouteData();
    routeData.Values.Add("controller", "Error");
    routeData.Values.Add("action", "Handler");
    routeData.Values.Add("exception", httpEx);
    Response.TrySkipIisCustomErrors = true;
    var rc = new RequestContext(new HttpContextWrapper(Context), routeData);
    var c = ControllerBuilder.Current.GetControllerFactory().CreateController(rc, "Error");
    c.Execute(rc);
}

发生异常时（例如：throw new ArgumentException("Generator with given Id does not exist.");），用户会收到包含所发生情况详细信息的错误视图。

问题是，错误消息没有在 HttpResponseMessage 中发送给用户（作为 ReasonPhrase 或其他任何形式）。

private async void DeleteGenerator(Guid id)
{
    var response = await dataService.RemoveGenerator(id);
    if ((int)response.StatusCode >= 300)
        MessageBox.Show( /* Error message from response */ );  
}

在这里我应该收到一个盒子，里面有 "Generator with given [...]"，但我不知道如何实现。我试过 this but the "HttpError" is missing, but I really don't know how to implement it to my code (how to send actual HttpResponseMessage by Application_Error) and this 但我还是不知道应该如何更改它。

编辑

这是我的常规错误处理程序控制器：

public ActionResult Handler(HttpException exception)
{
    Response.ContentType = "text/html";
    if (exception != null)
    {
        Response.StatusCode = exception.GetHttpCode();
        ViewBag.StatusString = (HttpStatusCode)exception.GetHttpCode();
        return View("Handler", exception);
    }
    return View("Internal");
}

我已经出于测试目的尝试了这个，但它也不起作用（客户端收到 HttpResponseMessage 和 "Bad Request" 作为 ReasonPhrase。

public HttpResponseMessage Handler(HttpException exception)
{
    Response.ContentType = "text/html";
    if (exception != null)
    {
        return new HttpResponseMessage
        {
            Content = new StringContent("[]", new UTF8Encoding(), "application/json"),
            StatusCode = HttpStatusCode.NotFound,
            ReasonPhrase = "TEST"
        };
    }
    return null;
}

Answer 1

所以在我的 Controller 中，负责显示错误视图（在 Application_Error 方法中创建和触发）我将 StatusDescription 添加到 Response.这并不理想，它会覆盖实际的 StatusCode 字符串，但它确实有效。

public class ErrorController : Controller
{
    public ActionResult Handler(HttpException exception)
    {
        Response.ContentType = "text/html";
        if (exception != null)
        {
            Response.StatusCode = exception.GetHttpCode();
            Response.StatusDescription = exception.Message;
            ViewBag.StatusString = (HttpStatusCode)exception.GetHttpCode();

            return View("Handler", exception);
        }

        return View("Internal");
    }
}

ASP.NET 发送异常消息

ASP.NET send exception message

c#

asp.net

asp.net-mvc

httpclient

httpresponsemessage

编辑