[WP8.1][C#]Why when I try to upload an Image with Windows Phone it uploads a random thing?

Question

I'm trying to upload an image from my Windows Store App (Windows Phone 8.1) to hosting (using PHP) but always when I "uploaded" the image, and I check its result the "image" it's a corrupted file. I think it's related to the byte array
conversion but I haven't found another way to do it. This is my code:
C# Code:
byte[] ConvertBitmapToByteArray()
WriteableBitmap bmp = bitmap;
using (Stream stream = bmp.PixelBuffer.AsStream())
MemoryStream memoryStream = new MemoryStream();
stream.CopyTo(memoryStream);
return memoryStream.ToArray();
public async Task<string> Upload()
try
using (var client = new HttpClient())
using (var content =
new MultipartFormDataContent())
byte[] data = ConvertBitmapToByteArray();
content.Add(new StreamContent(new MemoryStream(data)), "userfile", fileNewImage);
using (
var message =
await client.PostAsync("http://xplace.com/uploadtest.php", content))
var input = await message.Content.ReadAsStringAsync();
return input;
catch (Exception ex)
return null;
PHP code:
<?php
header('Content-Type: application/json');
$uploaddir = getcwd();
$uploadfile = $uploaddir . "/" . basename($_FILES['userfile']['name']);
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
echo '{"result": "sucessfull"}';
} else {
echo '{"result": "-1"}';
}?>
I wish someone could give me an idea about what I my mistake and how to fix it. Thanks in advance for your worthy knowledge.
Federico Navarrete

Answer 1

This is the answer to the problem someone gave me an idea that I have missed to translate to BMP.
byte[] ConvertBitmapToByteArray()
WriteableBitmap bmp = bitmap;
using (Stream stream = bmp.PixelBuffer.AsStream())
MemoryStream memoryStream = new MemoryStream();
stream.CopyTo(memoryStream);
return memoryStream.ToArray();
public async Task<string> Upload()
try
using (var client = new HttpClient())
using (var content =
new MultipartFormDataContent())
byte[] data = ConvertBitmapToByteArray();
using (var stream = new InMemoryRandomAccessStream())
// encoder *outputs* to stream
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.BmpEncoderId, stream);
// encoder's input is the bitmap's pixel data
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Straight,
(uint)bitmap.PixelWidth, (uint)bitmap.PixelHeight, 96, 96, data);
await encoder.FlushAsync();
content.Add(new StreamContent(stream.AsStream()), "userfile", fileNewImage);
using (
var message =
await client.PostAsync("http://xplace.com/uploadtest.php", content))
var input = await message.Content.ReadAsStringAsync();
return input;
catch (Exception ex)
return null;
Now I have a different problem that after I uploaded the Image to Azure, I cannot execute the PHP code this one:
$uploaddir = getcwd();
$uploadfile = $uploaddir . "/" . basename($_FILES['userfile']['name']);
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
chmod($uploadfile, 0755);
$Test = new Display($_FILES['userfile']['name']);
echo '{"result": "' . $Test->getNumber($_REQUEST['color'], false) . '"}';
//unlink($uploadfile);
} else {
echo '{"result": "-1"}';
I'd like to know what could be my bug because I don't understand why I can access from the URL, too to bit I cannot use it, maybe it's how I assigned the permissions but with or without the chmod, it
doesn't change at all. I have even tried other hostings and the problem is the same when I enter to the File Manager, there are only my PHP files and it doesn't allow me to manage the image.
Thanks for your worthy knowledge and experience.
Federico Navarrete