如果高度设置为自动，WPF ListView 没有滚动条
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WPF ListView no scrollbar if height set to auto
提问by Eatdoku
Hi i have a ListView that binds to a collection. I set the height of the ListView to auto for it to take up all the space in the region. However there is not scrollbar after i set the height to auto. If i give it a height then the scrollbar would show up.
嗨，我有一个绑定到集合的 ListView。我将 ListView 的高度设置为 auto 使其占据该区域的所有空间。但是在我将高度设置为自动后没有滚动条。如果我给它一个高度，那么滚动条就会出现。
the markup is pretty much like the following
标记非常类似于以下内容
<Grid>
<StackPanel>
<Expander>
<DataGrid>
<Expander>
<ListView>
回答by Joel B Fant
I have a hunch that your ListViewis inside a panel that allows it to expand vertically without limit.
我有一种预感，你ListView是在一个面板内，允许它无限制地垂直扩展。
If you put a ListViewinside a StackPanel, for example, the ListView's height can exceed the height of the StackPanel. The ListViewhas increased its height to show all its items, as far as it's concerned, thus no scrollbar.
例如，如果将 a 放在 aListView内StackPanel，则 theListView的高度可以超过StackPanel. 在ListView增加了它的高度，以显示其所有项目，就我们关心的，因此没有滚动条。
However, if you change that StackPanelto a Grid, where controls automatically try to fit themselves inside that area, the ListViewwill automatically have a scrollbar when it contains more items than it can display.
但是，如果您将其更改StackPanel为 a Grid，其中控件会自动尝试将自己放入该区域内，则ListView当它包含的项目多于可以显示时，将自动具有滚动条。
This will probably be solved most simply by adjusting your layout that contains the ListView.
这可能最简单地通过调整包含ListView.
回答by Sandeep
Instead of setting
而不是设置
<RowDefinition Height="auto"/>
set:
放：
<RowDefinition Height="1*"/>
回答by H.B.
Why should it show a scrollbar if there is nothing to scroll?
如果没有可滚动的内容，为什么要显示滚动条？
If you want to override any default behavior you can set ScrollViewer.VerticalScrollBarVisibility="Visible"on the ListBox.
如果您想覆盖任何可以ScrollViewer.VerticalScrollBarVisibility="Visible"在 ListBox 上设置的默认行为。
