I have the following code:
private static string boundary = "----CustomBoundary" + DateTime.Now.Ticks.ToString("x"); private static async Task<string> PostTest() { string servResp = ""; using (var content = new MultipartFormDataContent(boundary)) { content.Add(new StringContent("105212"), "case-id"); content.Add(new StringContent("1/14/2014"), "dateFrom"); content.Add(new StringContent("1/15/2014"), "dateTo"); HttpClientHandler handler = new HttpClientHandler(); cookieContainer = new CookieContainer(); handler.CookieContainer = cookieContainer; HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "http://somewebsite.com/form"); request.Headers.ExpectContinue = false; request.Content = content; httpClient = new HttpClient(handler); HttpResponseMessage response = await httpClient.SendAsync(request); response.EnsureSuccessStatusCode(); servResp = await response.Content.ReadAsStringAsync(); } return servResp; } When I run it, I see the Content-Type header in Fiddler:
Content-Type: multipart/form-data; boundary="----CustomBoundary8d0f01e6b3b5daf" Because the boundary value is in quotes, the server ignores the request body. If I remove the quotes and run the request in Fiddler Composer, the request is being processed correctly.
I tried adding the content headers:
//request.Content.Headers.Add("Content-Type", "multipart/form-data; boundary=" + boundary); //request.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("multipart/form-data; boundary=" + boundary); ... but it didn't work, the error messages were: "Cannot add value because header 'Content-Type' does not support multiple values." and "The format of value 'multipart/form-data, boundary=----CustomBoundary8d0f024297b32d5' is invalid.", correspondingly.
How can I add the proper Content-Type header to the request so that the boundary value would not be enclosed in quotes?
Content-Type: multipart/form-data; boundary=----CustomBoundary8d0f01e6b3b5daf