返回内容与IHttpActionResult非ok响应

对于从Web API 2控制器返回，如果响应是OK(状态200)，我可以返回内容与响应:

public IHttpActionResult Get()
{
    string myResult = ...
    return Ok(myResult);
}

如果可能的话，我希望在这里尽可能使用内置结果类型

我的问题是，对于另一种类型的响应(不是200)，我如何用它返回消息(字符串)?例如，我可以这样做:

public IHttpActionResult Get()
{
    return InternalServerError();
}

但这不是:

public IHttpActionResult Get()
{
    return InternalServerError("Message describing the error here");
}

理想情况下，我希望这是一般化的，这样我就可以用IHttpActionResult的任何实现发送回消息。

我需要这样做(并建立我的响应消息):

public IHttpActionResult Get()
{
    HttpResponseMessage responseMessage = ...;
    return ResponseMessage(responseMessage);
}

还是有更好的办法?

当前回答

我也有同样的问题。我想为我的api控制器创建自定义结果，像这样调用它们 return Ok("some text");

然后我这样做了: 1)使用singletone创建自定义结果类型

public sealed class EmptyResult : IHttpActionResult
{
    public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
    {
        return Task.FromResult(new HttpResponseMessage(System.Net.HttpStatusCode.NoContent) { Content = new StringContent("Empty result") });
    }
}

2)使用new方法创建自定义控制器:

public class CustomApiController : ApiController
{
    public IHttpActionResult EmptyResult()
    {
        return new EmptyResult();
    }
}

然后我可以在我的控制器中调用它们，像这样:

public IHttpActionResult SomeMethod()
    {
       return EmptyResult();
    }

2017-06-28 16:59:33

其他回答

你可以使用HttpRequestMessagesExtensions。CreateErrorResponse (System.Net。Http命名空间)，就像这样:

public IHttpActionResult Get()
{
   return ResponseMessage(Request.CreateErrorResponse(HttpStatusCode.InternalServerError, "Message describing the error here"));
}

最好基于请求创建响应，以利用Web API的内容协商。

2015-02-18 16:38:31

一个更详细的示例，支持在c# HttpStatusCode中未定义的HTTP代码。

public class MyController : ApiController
{
    public IHttpActionResult Get()
    {
        HttpStatusCode codeNotDefined = (HttpStatusCode)429;
        return Content(codeNotDefined, "message to be sent in response body");
    }
}

Content是在抽象类ApiController(控制器的基类)中定义的虚方法。声明如下:

protected internal virtual NegotiatedContentResult<T> Content<T>(HttpStatusCode statusCode, T value);

2019-08-07 18:37:55

我最终采用了以下解决方案:

public class HttpActionResult : IHttpActionResult
{
    private readonly string _message;
    private readonly HttpStatusCode _statusCode;

    public HttpActionResult(HttpStatusCode statusCode, string message)
    {
        _statusCode = statusCode;
        _message = message;
    }

    public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
    {
        HttpResponseMessage response = new HttpResponseMessage(_statusCode)
        {
            Content = new StringContent(_message)
        };
        return Task.FromResult(response);
    }
}

．.．可以这样使用:

public IHttpActionResult Get()
{
   return new HttpActionResult(HttpStatusCode.InternalServerError, "error message"); // can use any HTTP status code
}

我愿意接受改进建议。：）

2015-02-18 16:59:35

@mayabelle你可以创建IHttpActionResult具体和包装这些代码像这样:

public class NotFoundPlainTextActionResult : IHttpActionResult
{
    public NotFoundPlainTextActionResult(HttpRequestMessage request, string message)
    {
        Request = request;
        Message = message;
    }

    public string Message { get; private set; }
    public HttpRequestMessage Request { get; private set; }

    public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
    {
        return Task.FromResult(ExecuteResult());
    }

    public HttpResponseMessage ExecuteResult()
    {
        var response = new HttpResponseMessage();

        if (!string.IsNullOrWhiteSpace(Message))
            //response.Content = new StringContent(Message);
            response = Request.CreateErrorResponse(HttpStatusCode.NotFound, new Exception(Message));

        response.RequestMessage = Request;
        return response;
    }
}

2015-03-03 09:20:55

你可以用这个:

return Content(HttpStatusCode.BadRequest, "Any object");

2015-10-10 12:05:18

返回内容与IHttpActionResult非ok响应

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