private void CoverImage_DataContextChanged(FrameworkElement sender, DataContextChangedEventArgs args)
{
var book = DataContext as Book;
if (book == null)
{
return;
}
var filePath = AppDataPath.GetBookCoverPath(book.BookId);
if (filePath == null)
{
if (!string.IsNullOrEmpty(book.Cover))
{
DownloadCoverHelper.SaveHttpImage(AppDataPath.GetBookCoverFolderPath(), book.BookId + ".jpg",
book.Cover,
SetCoverImage);
}
else
{
this.ImageCover.Source = null;
}
}
else
{
this.ImageCover.Source = new BitmapImage(new Uri(filePath, UriKind.Absolute));
}
}
private static void OnBookValueChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var control = d as CoverImage;
var book = control?.CurrentBook;
// var book = DataContext as Book;
if (book == null)
{
if (control != null)
{
control.ImageCover.Source = null;
}
return;
}
var filePath = AppDataPath.GetBookCoverPath(book.BookId);
if (filePath == null)
{
if (!string.IsNullOrEmpty(book.Cover))
{
DownloadCoverHelper.SaveHttpImage(AppDataPath.GetBookCoverFolderPath(), book.BookId + ".jpg",
book.Cover,
control.SetCoverImage);
}
else
{
control.ImageCover.Source = null;
}
}
else
{
control.ImageCover.Source = new BitmapImage(new Uri(filePath, UriKind.Absolute));
}
}
public object Convert(object value, Type targetType, object parameter, string language)
{
var defaultValue = new BitmapImage(new Uri("ms-appx:Assets/Icon/cover.png", UriKind.Absolute));
var book = value as Book;
if (string.IsNullOrEmpty(book?.Cover))
{
return(defaultValue);
}
var filePath = AppDataPath.GetBookCoverPath(book.BookId);
if (filePath == null)
{
DownloadCoverHelper.SaveHttpImage(AppDataPath.GetBookCoverFolderPath(), book.BookId + ".jpg", book.Cover);
}
return(filePath == null ? new BitmapImage(new Uri(book.Cover, UriKind.RelativeOrAbsolute)) : new BitmapImage(new Uri(filePath, UriKind.Absolute)));
}
