Send httpcontent with PostAsync gives Internal Server Error

Question

To send data as querystring in PostAsync Method, I am using following approach. but i am getting Inernal Server Error.

 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) { //} } }

But When i send the request through fiddler, Its working fine. Here is my fiddler request

User-Agent: Fiddler

Content-Type: application/json; charset=utf-8

Host: testapi.com

Content-Length: 93

Authorization: Basic 12fbe6e1f63d832aa33232323

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

fyi basic authorization would be Authorization: Basic 12fbe6e1f63d832aa33232323, not token — Michael Rudner Evanchik
– Michael Rudner Evanchik, Commented Aug 15, 2016 at 15:38

Community · Accepted Answer · 2017-05-23 12:22:53Z

I have achieved the desire functionality using following approach 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();

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