How to post a file along with parameter to webapi method? - asp.net-web-api

Question

I am new to ASP.NET Web API. I have a sample FileUpload web api (from some site) to upload files to the server.
Following works fine for uploading a file.
public async Task<HttpResponseMessage> FileUpload()
{
// Check whether the POST operation is MultiPart?
if (!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
// Prepare CustomMultipartFormDataStreamProvider in which our multipart form
// data will be loaded.
//string fileSaveLocation = HttpContext.Current.Server.MapPath("~/App_Data");
string fileSaveLocation = HttpContext.Current.Server.MapPath("~/UploadedFiles");
CustomMultipartFormDataStreamProvider provider = new CustomMultipartFormDataStreamProvider(fileSaveLocation);
List<string> files = new List<string>();
try
{
// Read all contents of multipart message into CustomMultipartFormDataStreamProvider.
await Request.Content.ReadAsMultipartAsync(provider);
foreach (MultipartFileData file in provider.FileData)
{
files.Add(Path.GetFileName(file.LocalFileName));
}
// Send OK Response along with saved file names to the client.
return Request.CreateResponse(HttpStatusCode.OK, files);
}
catch (System.Exception e)
{
return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
}
}
// We implement MultipartFormDataStreamProvider to override the filename of File which
// will be stored on server, or else the default name will be of the format like Body-
// Part_{GUID}. In the following implementation we simply get the FileName from
// ContentDisposition Header of the Request Body.
public class CustomMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
{
public CustomMultipartFormDataStreamProvider(string path) : base(path) { }
public override string GetLocalFileName(HttpContentHeaders headers)
{
return headers.ContentDisposition.FileName.Replace("\"", string.Empty);
}
}
But, I want to send a parameter called as 'token' of type string to the following method using [FromBody] is it possible?
Required:
public async Task<HttpResponseMessage> FileUpload([FromBody] string token)
{
//somecode here
}
So, basically can we send multiple Content-Type data to the web api? Please suggest. I am using Fiddler for testing webapi.
Eg:
Request Body(json):
{"token":"FV00VYAP"}

Answer 1

You can pass extra content in through query string and then read it from your CustomMultipartFormDataStreamProvider.
// Read all contents of multipart message into CustomMultipartFormDataStreamProvider.
await Request.Content.ReadAsMultipartAsync(provider);
Then you can use provider.FormData to read the extra values you passed along.
// Show all the key-value pairs.
foreach (var key in provider.FormData.AllKeys)
{
foreach (var val in provider.FormData.GetValues(key))
{
Trace.WriteLine(string.Format("{0}: {1}", key, val));
}
}
See http://www.asp.net/web-api/overview/advanced/sending-html-form-data,-part-2 for more details.