HttpClient PutAsync 不向 api 发送参数答案

【问题标题】：HttpClient PutAsync doesn't send a parameter to apiHttpClient PutAsync 不向 api 发送参数
【发布时间】：2016-01-10 05:16:35
【问题描述】：

在控制器上Put如下：

[HttpPut]
[ActionName("putname")]
public JsonResult putname(string name)
{
    var response = ...
    return Json(response);  
}

问题在于通过以下方式使用此 API 时

using (httpClient = new HttpClient())
{
    string name = "abc";
    string jsonString = JsonConvert.SerializeObject(name);
    var requestUrl = new Uri("http:...../controller/putname/");
    using (HttpContent httpContent = new StringContent(jsonString))
    {
        httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
        HttpResponseMessage response = httpClient.PutAsync(requestUrl, httpContent).Result;
    }

此代码不会将参数名称传递给控制器。我什至尝试将 uri 更改为 /putname/" + name。

【问题讨论】：

标签： c# asp.net-mvc-3 json.net

【解决方案1】：

这对我有用：

var jsonString = "{\"appid\":1,\"platformid\":1,\"rating\":3}";
var httpContent = new StringContent(jsonString, Encoding.UTF8, "application/json");            
var message = await _client.PutAsync(MakeUri("App/Rate"), httpContent);
Assert.AreEqual(HttpStatusCode.NoContent, message.StatusCode);

和我的行动方法：

public void PutRate(AppRating model)
{
   if (model == null)
      throw new HttpResponseException(HttpStatusCode.BadRequest);

   if (ModelState.IsValid)
   {
     // ..
   }      
}

和模型

public class AppRating
{
    public int AppId { get; set; }
    public int PlatformId { get; set; }
    public decimal Rating { get; set; }
}

-斯坦

【讨论】：

感谢您的回复。我觉得你说的应该可以。以下是我所做的。 var cUri = new Uri("localhost/cart/coupon"); var jsonString = JsonConvert.SerializeObject(new { id = "abc" }); HttpResponseMessage cartResponse; using (HttpContent httpContent = new StringContent(jsonString)) { httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json"); cartResponse = httpClient.PostAsync(cUri, httpContent).Result; }
我正在使用与您建议的答案相同的东西，但不起作用。

【解决方案2】：

对我来说它工作正常：

            string requestUrl = endpointUri + "/Files/";
            var jsonString = JsonConvert.SerializeObject(new { name = "newFile.txt", type = "File" }); 

            HttpContent httpContent = new StringContent(jsonString);
            httpContent.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue ("application/json");          

            HttpClient hc = new HttpClient();

            //add the header with the access token
            hc.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);

            //make the put request
            HttpResponseMessage hrm = (await hc.PostAsync(requestUrl, httpContent));

            if (hrm.IsSuccessStatusCode)
            {
               //stuff
            }

【讨论】：

但这适用于 PostAsync。 OP 在询问 PutAsync