I have a problem getting file uploads working in asp.net web api I need to get multiple files uploaded from a web page. I have found how to do this in .net framework 4.5 using either MultipartMemoryStreamProvider or MultipartFormDataStreamProvider.
My solution needs to work on azure so avoiding the file system is highly preferable so I really need to use MultipartMemoryStreamProvider I also need to be able to get form data because I need to save the files in the database using a GUID provided
from the client web form this is because a secondary request will be sent from the client to a different application with the same GUID which I can then use this GUID to tie up both requests together.
I can get the GUID from a hidden field if I use MultipartFormDataStreamProvider but not if I use MultipartMemoryStreamProvider here is my code
public async Task<HttpResponseMessage> Post()
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
var provider = new MultipartMemoryStreamProvider();
foreach (var item in provider.Contents)
if (item.Headers.ContentDisposition.FileName != null)
catch (System.Exception e)
return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
Strangley when I upload files using memory stream I can see the control in
But cannot get to its value
This is my first time using asp.net web api and I have never used MVC
Any help appreciated