private async void OnUploadImage(object sender, RoutedEventArgs e)
{
// 定义选择器
var filePicker = new FileOpenPicker();
filePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
filePicker.FileTypeFilter.Add(".jpg");
filePicker.FileTypeFilter.Add(".png");
StorageFile file = await filePicker.PickSingleFileAsync();
if (file == null) return;
var stream = await file.OpenAsync(FileAccessMode.Read);
var image = new BitmapImage();
image.SetSource(stream);
image.ImageOpened += async (sender1, e1) =>
{
if (image.PixelHeight > image.PixelWidth)
{
image.DecodePixelHeight = 900;
}
else
{
image.DecodePixelWidth = 900;
}
stream.Seek(0);
var imageStorage = new MenuCardImageStorage();
var storage = new MenuCardStorage();
info.ImageFileName = string.Format("{0}.jpg", Guid.NewGuid().ToString());
await imageStorage.WriteImageAsync(stream, info.ImageFileName);
};
image.ImageFailed += (sender1, e1) =>
{
string s = e1.ErrorMessage;
};
info.Image = image;
}
private static async Task InitSampleDataAsync()
{
var storage = new MenuCardStorage();
var imageStorage = new MenuCardImageStorage();
if (await storage.IsRoamingFolderEmpty())
{
List<MenuCard> menuCards = MenuCardRepository.GetSampleMenuCards().ToList();
foreach (var card in menuCards)
{
RandomAccessStreamReference streamRef =
RandomAccessStreamReference.CreateFromUri(new Uri(card.ImagePath));
using (IRandomAccessStreamWithContentType stream =
await streamRef.OpenReadAsync())
{
card.ImagePath = string.Format("{0}.png", Guid.NewGuid());
await imageStorage.WriteImageAsync(stream, card.ImagePath);
}
}
await storage.WriteMenuCardsAsync(menuCards);
}
}
