save the image in storage file in windows phone 8 - windows-phone-8

Question

I'm making a windows phone 8 app of an app I made for windows store, and I am using PhotoChooser task to let the user upload a profile picture.
In the store version i used streams and FileOpenPicker, but i don't know how to use streams with PhotoChooser task.
This is how i did it in windows store, and its perfect:
StorageFile image;
public bunForm()
{
image = null;
this.InitializeComponent();
}
private async void choosePic(object sender, Windows.UI.Xaml.RoutedEventArgs e)
{
FileOpenPicker openPicker = new FileOpenPicker();
openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
openPicker.ViewMode = PickerViewMode.Thumbnail;
// Filter to include a sample subset of file types
openPicker.FileTypeFilter.Clear();
openPicker.FileTypeFilter.Add(".bmp");
openPicker.FileTypeFilter.Add(".png");
openPicker.FileTypeFilter.Add(".jpeg");
openPicker.FileTypeFilter.Add(".jpg");
// Open a stream for the selected file
var file = await openPicker.PickSingleFileAsync();
if (file != null)
{
image = file;
var stream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read);
bunPic.Visibility = Visibility.Visible;
// Ensure a file was selected
if (file != null)
{
// Ensure the stream is disposed once the image is loaded
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
// Set the image source to the selected bitmap
BitmapImage bitmapImage = new BitmapImage();
await bitmapImage.SetSourceAsync(fileStream);// bitmapImage.UriSource.ToString();
bunPic.Source = bitmapImage;
}
}
}
}
And here is how i'm trying it at windows Phone 8:
But (openPicker.PickSingleFileAsync();) line gives me error.
public BunForm()
{
InitializeComponent();
image = null;
this.photoChooserTask = new PhotoChooserTask();
this.photoChooserTask.Completed += new EventHandler<PhotoResult>(photoChooserTask_Completed);
}
StorageFile image;
private void choosePic(object sender, RoutedEventArgs e)
{
photoChooserTask.Show();
}
private async void photoChooserTask_Completed(object sender, PhotoResult e)
{
//this is the only line that gives me error
var file = await openPicker.PickSingleFileAsync();
///
if (file != null)
{
image = file;
var stream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read);
if (file != null)
{
// Ensure the stream is disposed once the image is loaded
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
MessageBox.Show(e.ChosenPhoto.Length.ToString());
//Code to display the photo on the page in an image control named myImage.
System.Windows.Media.Imaging.BitmapImage bmp = new System.Windows.Media.Imaging.BitmapImage();
bmp.SetSource(e.ChosenPhoto);
myImage.Source = bmp;
}
}
}
Debug.WriteLine("pic done");
}
I was wondering how i can save the image in storage file in windows phone 8?

Answer 1

As noted on MSDN pages - OpenFilePicker cannot be used in C# WP8 apps, but you can use the PhotoChooserTask with ease for uploadng the profile picture:
// first invoke the task somewhere
PhotoChooserTask task = new PhotoChooserTask();
task.Completed += task_Completed;
task.Show();
// handle the result
async void task_Completed(object sender, PhotoResult e)
{
// no photo selected
if (e.ChosenPhoto == null) return;
// get the file stream and file name
Stream photoStream = e.ChosenPhoto;
string fileName = Path.GetFileName(e.OriginalFileName);
// persist data into isolated storage
StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
using (Stream current = await file.OpenStreamForWriteAsync())
{
await photoStream.CopyToAsync(current);
}
...
// how to read the data later
StorageFile file2 = await ApplicationData.Current.LocalFolder.GetFileAsync(fileName);
Stream imageStream = await file2.OpenStreamForReadAsync();
// display the file as image
BitmapImage bi = new BitmapImage();
bi.SetSource(imageStream);
// assign the bitmap to Image in XAML: <Image x:Name="img"/>
img.Source = bi;
}

Answer 2

Accoriding to this
Windows Phone 8
This API is supported in native apps only.
You can't use FileOpenPicker class.
There are already answers to the problem OpenFilePicker not working