private FileOpenPicker CreateFileOpenPicker(FilePickerServiceOptions options)
{
var fileOpenPicker = new FileOpenPicker
{
SuggestedStartLocation = options.SuggestedStartLocation.ToPickerLocationId(),
ViewMode = options.ViewMode.ToPickerViewMode()
};
if (options.FileTypeFilters != null)
{
foreach (var fileTypeFilter in options.FileTypeFilters)
{
fileOpenPicker.FileTypeFilter.Add(fileTypeFilter);
}
}
return(fileOpenPicker);
}
/// <summary>
/// Shows the file picker so that the user can pick one file.
/// </summary>
/// <param name="options">The options.</param>
/// <returns>The <see cref="Task"/> object representing the asynchronous operation.</returns>
public virtual async Task <FilePickerServiceFileResult> PickSingleFileAsync(FilePickerServiceOptions options)
{
var filePicker = CreateFileOpenPicker(options);
#if WINDOWS_PHONE_81 || WINDOWS_PHONE_APP
var coreApplicationView = CoreApplication.GetCurrentView();
var taskCompletionSource = new TaskCompletionSource <StorageFile>();
TypedEventHandler <CoreApplicationView, IActivatedEventArgs> handler = null;
handler = (sender, e) =>
{
coreApplicationView.Activated -= handler;
var fileOpenPickerContinuationEventArgs = e as FileOpenPickerContinuationEventArgs;
if (fileOpenPickerContinuationEventArgs != null &&
fileOpenPickerContinuationEventArgs.Kind == ActivationKind.PickFileContinuation &&
fileOpenPickerContinuationEventArgs.Files != null)
{
taskCompletionSource.SetResult(fileOpenPickerContinuationEventArgs.Files.FirstOrDefault());
}
else
{
taskCompletionSource.SetResult(null);
}
};
coreApplicationView.Activated += handler;
filePicker.PickSingleFileAndContinue();
var selectedFile = await taskCompletionSource.Task.ConfigureAwait(false);
#else
var selectedFile = await filePicker.PickSingleFileAsync();
#endif
if (selectedFile != null)
{
return(new FilePickerServiceFileResult(selectedFile));
}
return(null);
}
/// <summary>
/// Shows the file picker so that the user can pick one file.
/// </summary>
/// <param name="options">The options.</param>
/// <returns>The <see cref="Task"/> object representing the asynchronous operation.</returns>
public virtual async Task<FilePickerServiceFileResult> PickSingleFileAsync(FilePickerServiceOptions options)
{
var filePicker = CreateFileOpenPicker(options);
#if WINDOWS_PHONE_81 || WINDOWS_PHONE_APP
var coreApplicationView = CoreApplication.GetCurrentView();
var taskCompletionSource = new TaskCompletionSource<StorageFile>();
TypedEventHandler<CoreApplicationView, IActivatedEventArgs> handler = null;
handler = (sender, e) =>
{
coreApplicationView.Activated -= handler;
var fileOpenPickerContinuationEventArgs = e as FileOpenPickerContinuationEventArgs;
if (fileOpenPickerContinuationEventArgs != null &&
fileOpenPickerContinuationEventArgs.Kind == ActivationKind.PickFileContinuation &&
fileOpenPickerContinuationEventArgs.Files != null)
{
taskCompletionSource.SetResult(fileOpenPickerContinuationEventArgs.Files.FirstOrDefault());
}
else
{
taskCompletionSource.SetResult(null);
}
};
coreApplicationView.Activated += handler;
filePicker.PickSingleFileAndContinue();
var selectedFile = await taskCompletionSource.Task.ConfigureAwait(false);
#else
var selectedFile = await filePicker.PickSingleFileAsync();
#endif
if (selectedFile != null)
{
return new FilePickerServiceFileResult(selectedFile);
}
return null;
}
/// <summary>
/// Shows the file picker so that the user can pick multiple files.
/// </summary>
/// <param name="options">The options.</param>
/// <returns>The <see cref="Task"/> object representing the asynchronous operation.</returns>
public virtual Task<IEnumerable<FilePickerServiceFileResult>> PickMultipleFilesAsync(FilePickerServiceOptions options)
{
return ExceptionHelper.ThrowNotSupported<Task<IEnumerable<FilePickerServiceFileResult>>>();
}
/// <summary>
/// Shows the file picker so that the user can pick one file.
/// </summary>
/// <param name="options">The options.</param>
/// <returns>The <see cref="Task"/> object representing the asynchronous operation.</returns>
public virtual Task<FilePickerServiceFileResult> PickSingleFileAsync(FilePickerServiceOptions options)
{
return ExceptionHelper.ThrowNotSupported<Task<FilePickerServiceFileResult>>();
}
private FileOpenPicker CreateFileOpenPicker(FilePickerServiceOptions options)
{
var fileOpenPicker = new FileOpenPicker
{
SuggestedStartLocation = options.SuggestedStartLocation.ToPickerLocationId(),
ViewMode = options.ViewMode.ToPickerViewMode()
};
if (options.FileTypeFilters != null)
{
foreach (var fileTypeFilter in options.FileTypeFilters)
{
fileOpenPicker.FileTypeFilter.Add(fileTypeFilter);
}
}
return fileOpenPicker;
}
/// <summary>
/// Shows the file picker so that the user can pick multiple files.
/// </summary>
/// <param name="options">The options.</param>
/// <returns>The <see cref="Task"/> object representing the asynchronous operation.</returns>
public virtual Task <IEnumerable <FilePickerServiceFileResult> > PickMultipleFilesAsync(FilePickerServiceOptions options)
{
return(ExceptionHelper.ThrowNotSupported <Task <IEnumerable <FilePickerServiceFileResult> > >());
}
/// <summary>
/// Shows the file picker so that the user can pick one file.
/// </summary>
/// <param name="options">The options.</param>
/// <returns>The <see cref="Task"/> object representing the asynchronous operation.</returns>
public virtual Task <FilePickerServiceFileResult> PickSingleFileAsync(FilePickerServiceOptions options)
{
return(ExceptionHelper.ThrowNotSupported <Task <FilePickerServiceFileResult> >());
}