web api post image with custom data - asp.net

Question

I am trying to post some custom data with image to web api. Please take a look at the method below.
public void Post(FlyerDetails FlyerDetails)
{
var httpRequest = HttpContext.Current.Request;
if (httpRequest.Files.Count > 0)
{
foreach (string file in httpRequest.Files)
{
var filePath = HttpContext.Current.Server.MapPath("~/Flyers/" + httpRequest.Files[file].FileName);
Bitmap bmp = new Bitmap(httpRequest.Files[file].InputStream);
Graphics g = Graphics.FromImage(bmp);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.DrawString(FlyerDetails.Message, new Font(FlyerDetails.FontColor, FlyerDetails.FontSize), Brushes.DarkRed, new PointF(0, 0));
g.Flush();
bmp.Save(filePath);
}
}
}
Now the problem is when i keep this method with parameter and post the data from fiddler it shows me 415 Unsupported Media Type error . If i remove the parameter then it is working fine. But i really need to pass the data along with the posted image.
Can any one suggest a good way to accomplish this ?
Thanks

Answer 1

After searching a lot i figured out the way to upload the data along with the image. Here is the revised version of the code. Hope that it will helpful to someone.
public async Task<HttpResponseMessage> Post()
{
var streamProvider = new MultipartFormDataStreamProvider(HttpContext.Current.Server.MapPath("~/Flyers/"));
await Request.Content.ReadAsMultipartAsync(streamProvider);
var response = Request.CreateResponse(HttpStatusCode.Created);
var filePath = "";// file path
if (System.IO.File.Exists(filePath))
{
string extension = Path.GetExtension(filePath);
Bitmap bmp = new Bitmap(filePath);
Graphics g = Graphics.FromImage(bmp);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
Color brushColor = System.Drawing.ColorTranslator.FromHtml(streamProvider.FormData["FontColorCode"]);
g.DrawString(streamProvider.FormData["FontFamily"], new Font(brushColor.Name, Convert.ToInt32(streamProvider.FormData["FontSize"])), new SolidBrush(brushColor), new PointF(0, 0));
g.Flush();
bmp.Save(HttpContext.Current.Server.MapPath("~/" + Guid.NewGuid() + extension));
response.Headers.Location = new Uri(new Uri(HttpContext.Current.Request.Url.AbsoluteUri).GetLeftPart(UriPartial.Authority) + "/Flyers/" + Guid.NewGuid() + extension);
}
return response;
}
NOTE : One should post the data as mutipart-formdata.

Answer 2

this line also gets a post parameter along with uploaded file:
string value = HttpContext.Current.Request.Params.Get("key");