使用 PostAsync 发送 httpcontent 会出现内部服务器错误

Question

要在 Post异步方法中将数据作为查询字符串发送，我使用以下方法。但我收到内部服务器错误。

 HttpResponseMessage response;
 string stringContent = "{ 'request_key': 'ABCD1234', 'request_code': 'CODE', 'request_type':'ID_type' }";
using(var client = new HttpClient()) {

                client.BaseAddress = new Uri(SubscriptionUtility.GetConfiguration("BaseURI"));
                client.DefaultRequestHeaders.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(SubscriptionUtility.GetConfiguration("ContentType")));
                client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", SubscriptionUtility.GetConfiguration("BasicAuthentication"));

                response = await client.PostAsync(SubscriptionUtility.GetConfiguration("SubscriptionAPI"), stringContent, new JsonMediaTypeFormatter());
                if(response.IsSuccessStatusCode) {

                    var dataObjects = JsonConvert.DeserializeObject<List<TestClass>>(response.Content.ReadAsStringAsync().Result);
                    //foreach(var d in dataObjects) {

                    //}
                }
            }

但是当我通过 fiddler 发送请求时，它工作正常。这是我的提琴手请求

用户代理：Fiddler

内容类型：application/json；字符集=utf-8

主持人：testapi.com

内容长度：93

授权：基本 12fbe6e1f63d832aa33232323

Post数据： { "request_key":"ABCD1234", "request_code":"CODE", "request_type":"ID_type" }

Answer 1

我使用以下方法实现了所需的功能 Post Request

using(var client = new HttpClient()) {


                client.BaseAddress = new Uri(SubscriptionUtility.GetConfiguration("BaseURI"));
                client.DefaultRequestHeaders.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(SubscriptionUtility.GetConfiguration("ContentType")));
                client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", SubscriptionUtility.GetConfiguration("BasicAuthentication"));
                var values = new Dictionary<string, string>
                    {
                       { "request_key", "ABCD1234" },
                       { "request_code", "CODE" },
                       { "request_type", "ID_type" }
                    };

                var content = new FormUrlEncodedContent(values);

                var response = await client.PostAsync(SubscriptionUtility.GetConfiguration("SubscriptionAPI"), content);
                var responseString = await response.Content.ReadAsStringAsync();

使用 PostAsync 发送 httpcontent 会出现内部服务器错误

Send httpcontent with PostAsync gives Internal Server Error

c#

api

http-post