public static void DownloadImage(String url, ResultHandler resultHandler, [CallerMemberName] string caller = null)
{
String urll = url.ToLower().Trim();
try
{
if (cachedImage.Contains(urll))
{
resultHandler(cachedImage.Get(urll));
return;
}
new Task(() =>
{
using (WebClient client = new WebClient())
{
Console.WriteLine(caller + " downloading sticker...");
byte[] data = client.DownloadData(url);
BitmapImage bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = new MemoryStream(data);
bitmap.EndInit();
if (resultHandler != null)
{
bitmap.Freeze();
Application.Current.Dispatcher.Invoke(() =>
{
cachedImage.AddReplace(urll, bitmap);
resultHandler(bitmap);
});
}
}
}).Start();
} catch (Exception e)
{
}
}