清除窗口电话 7 中的缓存 [英] clear cache in window phone 7

问题描述

我想在 window phone 7 中使用 Dipose 缓存.在我的项目中，我下载了图片，使用后我通过以下方式处理图片:

I want Dipose cache in window phone 7. In my project I have download Images, after use I Dispose Image by:

Image.source = null;
Image = null;

但记忆没有恢复原状，例如:

but memory does not return to its original, for example:

下载后我设置了图片来源:

After download I set source of image :

img.source = new bitmapImage(new uri("http://diadiem.com/image/123.jpg"),UriKind.Relative);

当下一页或再次加载页面时:我想清除旧项目，并在缓存中释放内存.虽然我尝试设置image.source= null，并设置控制Image = null.但是记忆并没有回到原来的样子.

When next Page or LoadPage Again: I want clear item old item, and Replease memory in cache. Although I tried set image.source= null, and set control Image = null. But memory does not return to its original.

请帮帮我！

推荐答案

要从缓存中删除下载的图像，您需要将其源分配给单独的 BitmapImage 并在设置之前将其设置为 null图像的来源为空.

To remove a downloaded image from the cache you need to assign it's source to a separate BitmapImage and set that to null before setting the image's source to null.

BitmapImage bitmapImage = image.Source as BitmapImage;
bitmapImage.UriSource = null;
image.Source = null;

不要问我为什么，但它有效.

Don't ask me why, but it works.

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