Android : uploading image/file to server with servicestack

i got refeer from this link How do I upload an image to a ServiceStack service?

[Route("/upload","POST")] public class UploadFileRequest { // Example of other properties you can send with the request public string[] Tags { get; set; } }

class MyFileService : Service
{
    public bool Post(UploadFileRequest request)
    {
        // Check a file has been attached
        if(Request.Files == null || Request.Files.Length == 0)
            throw new HttpError(400, "Bad Request", "No file has been uploaded");

        // Save the file
        Request.Files[0].SaveTo(Request.Files[0].FileName);

        // Maybe store the tags (or any other data in the request)
        // request.Tags

        return true;
    }
}

Then with the JsonServiceClient in your Android app, then your simply need to do this:

var filename = "cab.jpg"; // The path of the file to upload
var client = new JsonServiceClient("http://212.175.132.168/service/api/");
using(var fileStream = File.OpenRead(filename))
{
    client.PostFileWithRequest<bool>(fileStream, "cab.jpg", new UploadFileRequest { Tags = new[] { "Cab", "Taxis", "NewYork", "Yellow" }});
}

i used on dto and used on my android app, but when i try to send, it says empty or no file also on server get server error

is there something wrong?

and secondly, how can i get selected image location path;

i used http://developer.xamarin.com/recipes/android/other_ux/pick_image/ from whole image but i always get null or empty file error

can anyone share monodroid servicestack image upload sample?

thanks