运行throguh visual tree并将所有Images设置为null

问题描述

在使用图像时，我看到大量线程内存泄漏。
那么，只有拥有一个通用函数，某种自己的GC，它可以在NavigatingFrom上运行，查找所有图像（甚至在虚拟化列表的模板中）并将它们设置为null是个好主意吗？

I saw tons of threads with memory leaking while using images. So, is it a good idea just to have a general function, some kind of own GC, which would run at NavigatingFrom, find all images (even in templates of virtualized lists) and set them to null?

推荐答案

这是一个帮助您迭代页面的所有图像：

Here is an helper to iterate throught all the images of your page:

public IEnumerable<Image> GetAllImage(DependencyObject root)
    {
        var count = VisualTreeHelper.GetChildrenCount(parentElement);


        for (int i = 0; i < count; i++)
        {
            var child = VisualTreeHelper.GetChild(parentElement, i);
            if (child is Image)
            {
                yield return (Image)child;
            }
            foreach (var image in GetAllImage(child))
            {
                yield return image;
            }

        }
    }

你可以只需将您的页面根目录作为参数调用它，它应该将所有图像返回给您。

You can just call it with the root of your page as parameter and it should return all the images to you.

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