private static async void DownloadImage()
{
while (true)
{
ImageQueueInfo t = null;
lock (ImageQueue.Stacks)
{
if (ImageQueue.Stacks.Count > 0)
{
t = ImageQueue.Stacks.Dequeue();
}
}
if (t != null)
{
Uri uri = new Uri(t.url);
BitmapImage image = null;
try
{
if ("http".Equals(uri.Scheme, StringComparison.CurrentCultureIgnoreCase))
{
//如果是HTTP下载文件
var service = new PhotoImageService();
Byte[] imgData = await service.Download(t.url);
if (null != imgData)
{
using (var ms = new MemoryStream(imgData))
{
image = new BitmapImage();
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.StreamSource = ms;
image.EndInit();
}
}
}
else if ("file".Equals(uri.Scheme, StringComparison.CurrentCultureIgnoreCase))
{
using (var fs = new FileStream(t.url, FileMode.Open))
{
image = new BitmapImage();
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.StreamSource = fs;
image.EndInit();
}
}
if (image != null)
{
if (image.CanFreeze)
{
image.Freeze();
}
await t.image.Dispatcher.BeginInvoke(new Action <ImageQueueInfo, BitmapImage>((i, bmp) =>
{
if (ImageQueue.OnComplete != null)
{
ImageQueue.OnComplete(i.image, i.url, bmp);
}
}), new Object[] { t, image });
}
}
catch (Exception e)
{
System.Windows.MessageBox.Show(e.Message);
continue;
}
}
if (ImageQueue.Stacks.Count > 0)
{
continue;
}
autoEvent.WaitOne();
}
}
private static void OnSourceWithSourceChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
ImageQueue.Queue((Image)o, (string)e.NewValue);
}
