如何获取HttpWebResponseMessage的内容

Question

我有一个 asp.net MVC razor C# 应用程序，它有 1 个控制器和 1 个接受参数的 POST 函数。该函数返回一个 HttpResponseMessage。

public class VersionController : Controller
{
    [HttpPost]
    public HttpResponseMessage LatestClientVersion(string myVar)
    {
        string outputMessage = "This is my output";
        ...

        var resp = new HttpResponseMessage(HttpStatusCode.OK);
        resp.Content = new StringContent(outputMessage, Encoding.UTF8, "text/plain");
        return resp;
    }
}

出于测试目的，我使用 Postman 向 URL 发出 POST 请求。它回应：

StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content:      System.Net.Http.StringContent, Headers:
{
    Content-Type: text/plain; charset=utf-8
}

我的状态码响应良好，但我没有看到我的字符串“这是我的输出”

所以我想也许这与 C# 特定的东西有关，所以我做了一个 C# winforms 应用程序来测试。因此，当我单击按钮时，它会执行以下操作：

    public void TestWebRequest()
    {
        try
        {               
            WebRequest request = WebRequest.Create(txtURL.Text);
            request.Method = "POST";
            string postData = "myVar=test";
            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = byteArray.Length;
            Stream dataStream = request.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();
            WebResponse response = request.GetResponse();
            HttpWebResponse httpResponse = (HttpWebResponse)request.GetResponse();

            dataStream = response.GetResponseStream();

            StreamReader reader = new StreamReader(dataStream);

            string responseFromServer = reader.ReadToEnd();

            // Send text to the textbox
            SetOutputText(responseFromServer);

            reader.Close();
            dataStream.Close();
            response.Close();
        }
        catch (Exception ex)
        {
            SetOutputText(ex.Message);
        }            
    }
 }

此功能运行完美，但我仍然得到与 Postman 中相同的响应...如何获得“这是我的输出”的实际内容？

编辑

我做了另一个简单的 HttpGet 请求

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Web;
using System.Web.Mvc;
using System.Web.Configuration;
using System.Net.Http.Headers;
using System.Net;
using System.Text;

namespace MyWebService.Controllers
{
    public class VersionController : Controller
    {
         [HttpGet]
         public HttpResponseMessage Test()
        {
            HttpResponseMessage response = new HttpResponseMessage();
            response.Content = new StringContent("This is my output");
            return response;
        }
     }
 }

使用 Postman 时，我得到以下结果

StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content:     System.Net.Http.StringContent, Headers:
{
    Content-Type: text/plain; charset=utf-8
}

Answer 1

您正在混淆 WebAPI 和 MVC。

对于 WebAPI，HttpResponseMessage(with Content = new StringContent("the string")) 将起作用。

对于 MVC，返回字符串的语法是（注意ActionResult返回类型和Content()调用）：

public ActionResult Test() 
{
    return Content("This is my output");
}