WebAPI built-in formatters only support the following media types: application/json
, text/json
, application/xml
, text/xml
and application/x-www-form-urlencoded
For multipart/form-data
, which is what you are sending, take a look at Sending HTML Form Data and ASP.NET WebApi: MultipartDataMediaFormatter
Sample client
using (var client = new HttpClient())
{
using (var content = new MultipartFormDataContent())
{
client.BaseAddress = new Uri("http://localhost:54711/");
content.Add(new StreamContent(File.OpenRead(@"d:\foo.jpg")), "foo", "foo.jpg");
var parameters = new FeedItemParams()
{
Id = "1234",
Comment = "Some comment about this or that."
};
content.Add(new ObjectContent<FeedItemParams>(parameters, new JsonMediaTypeFormatter()), "parameters");
var result = client.PostAsync("/api/Values", content).Result;
}
}
Sample controller if you follow the first article
public async Task<HttpResponseMessage> PostFormData()
{
// Check if the request contains multipart/form-data.
if (!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
string root = HttpContext.Current.Server.MapPath("~/App_Data");
var provider = new MultipartFormDataStreamProvider(root);
// Read the form data.
await Request.Content.ReadAsMultipartAsync(provider);
//use provider.FileData to get the file
//use provider.FormData to get FeedItemParams. you have to deserialize the JSON yourself
return Request.CreateResponse(HttpStatusCode.OK);
}