private static async Task <StorageFile> SavePhotoAsync(FilteredPhotoModel photo, StorageFile file)
{
CachedFileManager.DeferUpdates(file);
using (var fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite))
using (var photoStream = await photo.GetFilteredPhotoAsync())
using (var reader = new DataReader(photoStream))
using (var writer = new DataWriter(fileStream))
{
await reader.LoadAsync((uint)photoStream.Size);
var buffer = reader.ReadBuffer((uint)photoStream.Size);
writer.WriteBuffer(buffer);
await writer.StoreAsync();
await writer.FlushAsync();
}
var status = await CachedFileManager.CompleteUpdatesAsync(file);
if (status == Windows.Storage.Provider.FileUpdateStatus.Complete)
{
return(file);
}
else
{
return(null);
}
}
private async Task <StorageFile> SaveTemporaryPhotoAsync(FilteredPhotoModel photo)
{
var filename = Application.Current.Resources["PhotoSaveTemporaryFilename"] as string;
var folder = ApplicationData.Current.TemporaryFolder;
if (filename != null)
{
var task = folder.CreateFileAsync(filename, Windows.Storage.CreationCollisionOption.ReplaceExisting).AsTask();
task.Wait();
var file = task.Result;
CachedFileManager.DeferUpdates(file);
using (var fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite))
using (var photoStream = await photo.GetFilteredPhotoAsync())
using (var reader = new DataReader(photoStream))
using (var writer = new DataWriter(fileStream))
{
await reader.LoadAsync((uint)photoStream.Size);
var buffer = reader.ReadBuffer((uint)photoStream.Size);
writer.WriteBuffer(buffer);
await writer.StoreAsync();
await writer.FlushAsync();
}
var status = await CachedFileManager.CompleteUpdatesAsync(file);
if (status == Windows.Storage.Provider.FileUpdateStatus.Complete)
{
return(file);
}
else
{
return(null);
}
}
return(null);
}
