释放文件上的句柄。来自BitmapImage的ImageSource [英] Release handle on file. ImageSource from BitmapImage

问题描述

如何释放该文件的句柄？

How can I release the handle on this file?

img类型为System.Windows.Controls.Image

img is of type System.Windows.Controls.Image

private void Load()
{
    ImageSource imageSrc = new BitmapImage(new Uri(filePath));
    img.Source = imageSrc;
    //Do Work
    imageSrc = null;
    img.Source = null;
    File.Delete(filePath); // File is being used by another process.
}

---

解决方案

private void Load()
{
    ImageSource imageSrc = BitmapFromUri(new Uri(filePath));
    img.Source = imageSrc;
    //Do Work
    imageSrc = null;
    img.Source = null;
    File.Delete(filePath); // File deleted.
}



public static ImageSource BitmapFromUri(Uri source)
{
    var bitmap = new BitmapImage();
    bitmap.BeginInit();
    bitmap.UriSource = source;
    bitmap.CacheOption = BitmapCacheOption.OnLoad;
    bitmap.EndInit();
    return bitmap;
}

推荐答案

在MSDN论坛上找到了答案。

Found the answer on MSDN Forum.

除非将缓存选项设置为
BitmapCacheOption.OnLoad，否则不会关闭位图流。因此，您需要这样的东西：

Bitmap stream is not closed unless caching option is set as BitmapCacheOption.OnLoad. So you need something like this:

public static ImageSource BitmapFromUri(Uri source)
{
    var bitmap = new BitmapImage();
    bitmap.BeginInit();
    bitmap.UriSource = source;
    bitmap.CacheOption = BitmapCacheOption.OnLoad;
    bitmap.EndInit();
    return bitmap;
}

使用上述方法获取ImageSource时，源文件
将立即关闭。

And when you get an ImageSource using the method above, source file will be immediately closed.

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