Windowsストア用に作成したアプリのWindows Phone 8アプリを作成しています.PhotoChooserタスクを使用して、ユーザーがプロフィール写真をアップロードできるようにしています。
ストア版ではストリームと FileOpenPicker を使っていましたが、PhotoChooser タスクでストリームを使う方法がわかりません。
これは私がWindowsストアで行った方法であり、完璧です:
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;
}
}
}
}
そして、これが私がWindows Phone 8で試している方法です:しかし、 (openPicker.PickSingleFileAsync();) 行でエラーが発生します。
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");
}
Windows Phone 8のストレージファイルに画像を保存するにはどうすればよいですか?