问题描述

我是 WPF 开发的新手，我有一个 ListView，我想冻结标题行，以便在用户滚动列表时它不会滚动到屏幕外.我继承的 xaml 代码如下所示:

I am new to WPF development, I have a ListView and I want to freeze the header row so that it won't scroll off the screen when the user scrolls the list. The xaml code, I have inherited, looks something like this:

<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
  <DockPanel>
    <forms:BindableGrid DockPanel.Dock="Top" [code snipped] >
    <ListView.View>
      <GridView>
        <GridViewColumn Header="ColA" DisplayMemberBinding="{Binding ColA}" />
        <GridViewColumn Header="ColB" DisplayMemberBinding="{Binding ColB}" />
           [etc]

推荐答案

ListView 已经这样做了 - 它有一个内部 ScrollViewer 只滚动项目而不是标题.

The ListView already does this - it has an internal ScrollViewer that only scrolls the items and not the header.

问题是你的外部 ScrollViewer 告诉它的孩子(DockPanel)它有无限的可用空间，而 DockPanel 告诉它到它的孩子，所以你的 ListView 最终占用了显示所有项目所需的空间，并且内部 ScrollViewer 不显示.

The issue is that your outer ScrollViewer tells its child (the DockPanel) that it has infinite space available, and the DockPanel tells this to its children, so your ListView ends up taking up as much space as it needs to display all the items and the internal ScrollViewer doesn't show up.

如果你拿走你的外部 ScrollViewer，ListView 应该会发现它的空间有限，并且内部 ScrollViewer 会出现.

If you take away your outer ScrollViewer, the ListView should pick up that it has limited space, and the internal ScrollViewer will appear.

这显然会影响 DockPanel 中的其他内容，所以我会看看会发生什么然后从那里开始.

This will obviously affect the rest of the stuff in your DockPanel, so I'd see what happens and go from there.

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