Hello,

Try to compare it to this example to see if you're doing something wrong: https://gist.github.com/nul800sebastiaan/8008892

Jeroen

-- THERE'S AN UPDATE BELOW --

The only difference between Sebastiaans approach and mine is de Model.Files part. Do you know some example or gist where a mvc-controller uploads an image to umbraco v6?

My current approach is this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web;
using Umbraco.Web.WebApi;
using Umbraco.Core.Models;
using umbraco.NodeFactory;
using umbraco;
using System.IO;


namespace _201401_001_VVEAPPBACAZURE.Controllers
{
    public class ImageApiController : UmbracoApiController
    {
        public string GetUpload()
        {
            return "This is a get requst, not a post!";
        }
    public static List<string> AllowedFormats
    {
        get { return new List<string>() { ".jpg", ".png", ".jpeg" }; }
    }

    public HttpResponseMessage PostUpload()
    {
        HttpResponseMessage result = null;
        var httpRequest = HttpContext.Current.Request;
        if (httpRequest.Files.Count > 0)
        {
            IEnumerable<Node> nodes = uQuery.GetNodesByType("ApiSettings");
            int uploadFolderId = Convert.ToInt32(nodes.First().GetProperty("imageUploadFolder").Value);



            foreach (string file in httpRequest.Files)
            {
                if(AllowedFormats.Any(format => (Path.GetExtension(httpRequest.Files[file].FileName) == format))) {
                    if (httpRequest.Files[file] != null && httpRequest.Files[file].ContentLength > 0)
                    {
                        IMedia folder = Services.MediaService.CreateMedia(httpRequest["vve"], uploadFolderId, "Folder");
                        Services.MediaService.Save(folder);

                        IMedia subfolder = Services.MediaService.CreateMedia(DateTime.Now.ToString(), folder.Id, "Folder");
                        Services.MediaService.Save(subfolder);

                        IMedia newImage = Services.MediaService.CreateMedia(httpRequest.Files[file].FileName, subfolder.Id, "Image");

                        newImage.SetValue("umbracoFile", httpRequest.Files[file]);
                        Services.MediaService.Save(newImage);
                        result = Request.CreateResponse(HttpStatusCode.Created, newImage.Id.ToString());
                    }
                    else
                    {
                        result = Request.CreateResponse(HttpStatusCode.BadRequest, "File is null");
                    }
                }
                else
                {
                    result = Request.CreateResponse(HttpStatusCode.BadRequest, "Not an image");
                }
            }
        }
        else
        {
            result = Request.CreateResponse(HttpStatusCode.BadRequest, "No files");
        }

        return result;
    }
}
}

Update: when I post my request with Chrome's Plugin POSTMAN everything works fine. Somehow the stream is not send properly. So maybe the problem isn't with the controller.

is working on a reply...