public async Task <string> PickImageAsync(string source)
{
var picker = new FileOpenPicker
{
ViewMode = PickerViewMode.Thumbnail,
SuggestedStartLocation = PickerLocationId.PicturesLibrary
};
picker.FileTypeFilter.Add(".jpg");
picker.FileTypeFilter.Add(".jpeg");
picker.FileTypeFilter.Add(".png");
StorageFile result = await picker.PickSingleFileAsync();
if (result != null && !string.IsNullOrEmpty(result.Path))
{
if (!string.IsNullOrEmpty(source))
{
WinIsolatedStorage.DeleteAsync(source);
}
string filename = "background-" + Guid.NewGuid() + Path.GetExtension(result.Path);
StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
await result.CopyAndReplaceAsync(file);
return(filename);
}
return(null);
}
public async Task SaveFileAsync <T>(T item, string filename)
{
await WinIsolatedStorage.SaveAsync(item, filename);
}
public async Task <T> LoadFileAsync <T>(string filename)
{
return(await WinIsolatedStorage.RestoreAsync <T>(filename));
}
public async Task DeleteFileAsync(string path)
{
await WinIsolatedStorage.DeleteAsync(path);
}
