如何从HttpResponseMessage中检索传递的异常（HttpStatusCode，异常） [英] How can I retrieve passed exception from HttpResponseMessage(HttpStatusCode, Exception)

问题描述

根据以下网站，您可以将异常参数传递给HttpResponseMessage.CreateErrorResponse方法（ https://msdn.microsoft.com/zh-CN/library/jj127064（v = vs.118）.aspx ）

According to the following website, you can pass an exception parameter to the HttpResponseMessage.CreateErrorResponse method (https://msdn.microsoft.com/en-us/library/jj127064(v=vs.118).aspx)

我的问题是如何从CreateErrorResponse方法创建的HttpResponseMessage中检索异常信息。如果没有办法获取异常信息，那么有一个方法重载将异常作为输入有什么意义？

My question is how can I retrieve the exception information from the HttpResponseMessage created by the CreateErrorResponse method. If there is not way to get the exception information, what is the point of having a method overload for taking an exception as an input?

要澄清我的答案不寻找...
我知道我可以在正文内容中传递自定义错误原因（ http://weblogs.asp.net/fredriknormen/asp-net-web-api-exception-handling ），但我真的很好奇如何使用 HttpRequestMessageExtensions.CreateErrorResponse方法（HttpRequestMessage，HttpStatusCode，异常）方法重载。

To clarify on what answers I am not looking for... I know that I can pass a customized error reason in the content of the body (http://weblogs.asp.net/fredriknormen/asp-net-web-api-exception-handling) but I am really just curious about how to use the HttpRequestMessageExtensions.CreateErrorResponse Method (HttpRequestMessage, HttpStatusCode, Exception) method overload.

示例WebAPI控制器：

Example WebAPI Controller:

Route("location/{locationName}/Databases/{databasename}/ProcedureSession")][LocationSetUp]
public HttpResponseMessage Post([FromBody] ProcedureSessionData procedureSession)
    {
        try
        {
            throw new Exception("test Exception");
        }
        catch (Exception e)
        {
           return Request.CreateErrorResponse(HttpStatusCode.InternalServerError,
             e);
        }
    }

如何在此代码中获取异常：

How do I pick up the exception in this code:

using (var client = new HttpClient())
  {
    client.BaseAddress = new Uri("http://localhost/");
    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    string api = "testApi/location/here/databases/testDb/ProcedureSession";
    HttpResponseMessage response = client.PostAsJsonAsync(api, newSessionData).Result;
    if (!response.IsSuccessStatusCode)
    {
         //how can i pick up the exception object from here? 
         //Or am I missing the point of this CreateErrorResponse overload?
    }

推荐答案

从以下位置获取错误消息HttpResponseMessage，您必须获取HttpError对象，如下所示。然后，HttpError对象包含ExceptionMessage，ExceptionType和StackTrace信息。

To get the error message from the HttpResponseMessage you have to get the HttpError object as shown below. The HttpError object then contains the ExceptionMessage, ExceptionType, and StackTrace information.

if(!response.IsSuccessStatusCode){
    HttpError error = response.Content.ReadAsAsync<HttpError>().Result;
}

这篇关于如何从HttpResponseMessage中检索传递的异常（HttpStatusCode，异常）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！