释放文件句柄.来自 BitmapImage 的 ImageSource [英] Release handle on file. ImageSource from BitmapImage

问题描述

如何释放这个文件的句柄?

How can I release the handle on this file?

img 是 System.Windows.Controls.Image 类型

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.
}

<小时>

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.

位图流不会关闭，除非缓存选项设置为BitmapCacheOption.OnLoad.所以你需要这样的东西:

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;
}

当你使用上面的方法得到一个 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.

请参阅 MSDN 社交论坛

这篇关于释放文件句柄.来自 BitmapImage 的 ImageSource的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！