public static void DownloadImage(Image img, String url)
{
ImageDownInfo downInfo = new ImageDownInfo()
{
url = url, image = img
};
Thread t = new Thread(new ParameterizedThreadStart(ImageDown.DownloadImage));
t.Name = "下载图片";
t.IsBackground = true;
t.Start(downInfo);
}
private static void DownloadImage(object obj)
{
if (obj != null && obj is ImageDownInfo)
{
ImageDownInfo downInfo = obj as ImageDownInfo;
Uri uri = new Uri(downInfo.url);
BitmapImage image = null;
try
{
if ("http".Equals(uri.Scheme, StringComparison.CurrentCultureIgnoreCase))
{
//如果是HTTP下载文件
WebClient wc = new WebClient();
using (var ms = new MemoryStream(wc.DownloadData(uri)))
{
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(downInfo.url, FileMode.Open))
{
image = new BitmapImage();
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.StreamSource = fs;
image.EndInit();
}
}
}
catch (Exception ex)
{
downInfo.image.Dispatcher.BeginInvoke(new Action <ImageDownInfo, BitmapImage>((i, bmp) =>
{
if (ImageDown.OnError != null)
{
ImageDown.OnError(i.image, ex);
}
}), new Object[] { downInfo, image });
}
try
{
if (image != null)
{
if (image.CanFreeze)
{
image.Freeze();
}
downInfo.image.Dispatcher.BeginInvoke(new Action <ImageDownInfo, BitmapImage>((i, bmp) =>
{
if (ImageDown.OnComplate != null)
{
ImageDown.OnComplate(i.image, i.url, bmp);
}
}), new Object[] { downInfo, image });
}
}
catch (Exception e)
{
System.Windows.MessageBox.Show(e.Message);
}
}
}
