post multipart/form-data in c# HttpClient 4.5

Question

Problem

I am trying to post API to send data to API which calls my internal API service to send that data to other API i service. Entity contains property with fil

Answer 1

This method works for me. You can use form data and file

public async Task<bool> Upload(FileUploadRequest model)
{
    var httpClientHandler = new HttpClientHandler()
    {
      Proxy = new WebProxy("proxyAddress", "proxyPort")
      {
        Credentials = CredentialCache.DefaultCredentials
      },
      PreAuthenticate = true,
      UseDefaultCredentials = true
    };


    var fileContent = new StreamContent(model.File.OpenReadStream())
    {
       Headers =
       {
           ContentLength = model.File.Length,
           ContentType = new MediaTypeHeaderValue(model.File.ContentType)
       }
    };

    var formDataContent = new MultipartFormDataContent();
    formDataContent.Add(fileContent, "File", model.File.FileName);          // file
    formDataContent.Add(new StringContent("Test Full Name"), "FullName");   // form input

    using (var client = new HttpClient(handler: httpClientHandler, disposeHandler: true))
    {
        client.DefaultRequestHeaders.Add("Authorization", "Bearer " + tokenString);

        using (var res = await client.PostAsync("http://filestorageurl", formDataContent))
        {
           return res.IsSuccessStatusCode;
        }
    }
}