为什么将 ScrollViewer.CanContentScroll 设置为 false 禁用虚拟化 [英] why setting ScrollViewer.CanContentScroll to false disable virtualization

问题描述

正如大多数 WPF 开发人员所知，将 ScrollViewer.CanContentScroll 设置为 false 将禁用虚拟化；但我想知道它是如何工作的，因为我尝试在将 ScrollViewer.CanContentScroll 设置为 false 时启用虚拟化.

As most WPF developers know, setting ScrollViewer.CanContentScroll to false will disable virtualization; but I'd like to know how it works, because I try to enable virtualization while setting ScrollViewer.CanContentScroll to false.

推荐答案

"ScrollViewer 目前允许两种滚动模式:平滑逐像素滚动(CanContentScroll = false)或离散逐项滚动(CanContentScroll = true).目前 WPF 仅在逐项滚动时才支持 UI 虚拟化.Pixel-基于滚动也称为物理滚动"，基于项目的滚动也称为逻辑滚动"."

"ScrollViewer currently allows two scrolling modes: smooth pixel-by-pixel scrolling (CanContentScroll = false) or discrete item-by-item scrolling (CanContentScroll = true). Currently WPF supports UI virtualization only when scrolling by item. Pixel-based scrolling is also called "physical scrolling" and item-based scrolling is also called "logical scrolling"."

虚拟化需要基于项目的滚动，因此它可以跟踪当前视图中的逻辑单元(项目)...将 ScrollViewer 设置为基于像素的滚动，不再有逻辑单元的概念，只有像素！！！

Virtualization requires an item-based scrolling so it can keep track of logical units (items) currently in view... Setting the ScrollViewer to a pixel-based scrolling there is no more concept of logic units but only pixels!!!

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