如何从WebAPI中的HttpResponse对象获取错误消息? [英] How do I get the error message from an HttpResponse object in WebAPI?

问题描述

我有一个控制器，该控制器根据以下代码生成带有以下消息的异常:-

I have a controller that generates an exception from the following code with the following message:-

public HttpResponseMessage PutABook(Book bookToSave)
{
   return Request.CreateErrorResponse(HttpStatusCode.Forbidden, "No Permission");
}

用以下代码测试此方法:-

am testing this method with the following code:-

var response = controller.PutABook(new Book());
Assert.That(response.StatusCode,Is.EqualTo(HttpStatusCode.Forbidden));
Assert.That(response.Content,Is.EqualTo("No Permission"));

但是却收到一个错误，内容不是没有权限".看来我也无法将响应转换为 HttpError 来获取消息内容"No Permission".状态码返回正常.只是在努力获取消息内容.

But am getting an error that the content is not "No Permission". It seems I can't cast the response to an HttpError either to get the message content "No Permission". The status code is returned fine. Just struggling to get the message content.

推荐答案

正如您在注释中所指出的，您可以使用 response.Content.ReadAsAsync< HttpError>()或也可以使用 response.TryGetContentValue< HttpError>().在这两种情况下，都将检查内容以查看其内容是否为 ObjectContent 类型，并从中获取值.

As you figured in your comment, you could either use response.Content.ReadAsAsync<HttpError>() or you could also use response.TryGetContentValue<HttpError>(). In both these cases, the content is checked to see if its of type ObjectContent and the value is retrieved from it.

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