WPF中的ListBox，VirtualizingStackPanel和平滑滚动 [英] ListBox, VirtualizingStackPanel, and Smooth Scrolling in WPF

问题描述

我有一个ListBox，它可能具有许多行的模板化DB记录，包括绑定到ObservableCollection<MyItem>的Image.有时该收藏可以容纳数千个物品.

I have a ListBox that may have many rows of templated DB records, including an Image, bound to an ObservableCollection<MyItem>. Sometimes the collection could hold thousands of items.

性能很好，但是滚动是默认的跳跃行为.我希望它可以平滑滚动，所以我未选中ScrollViewer.CanContentScroll.

The performance is great, but the scrolling is the default jumpy behavior. I would like it to have smooth scrolling, so I unchecked ScrollViewer.CanContentScroll.

现在，我可以流畅地滚动，但是性能太差了:在一个单独的线程中检索数据，该线程很快完成，但是要花10到20秒的时间才能在ListBox中显示结果.我认为这是因为取消选中ScrollViewer.CanContentScroll会将基础VirtualizingStackPanel更改为常规StackPanel，因此它将在显示结果之前加载整个集合.

Now I have smooth scrolling, but the performance is horrendous: the data is retrieved in a separate thread, and the thread finishes quickly, but it takes 10-20 seconds for the results to show in the ListBox. I assume that this is because unchecking ScrollViewer.CanContentScroll changes the underlying VirtualizingStackPanel to a regular StackPanel and so it is loading the entire collection before displaying the results.

所以我的问题是:如何在不牺牲VirtualizingStackPanel行为和性能的情况下保持平滑滚动?

So my question is this: how do I retain the the smooth scrolling without sacrificing the VirtualizingStackPanel behavior and performance?

推荐答案

取消选中CanContentScroll时，您

When you uncheck CanContentScroll, you lose virtualization. And the answer is really frustrating: For now there is no out-of-the-box solution :(.

PS:这不是这里的第一篇文章，询问

PS: This is not the first post here, asking this very question.

这篇关于WPF中的ListBox，VirtualizingStackPanel和平滑滚动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！