<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<!-- … -->
</Grid.RowDefinitions>
<TextBlock Grid.Column="0">
This should be allways visible, even if the expander isn’t expanded!
</TextBlock>
<Expander ExpandDirection="Left" Grid.Column="1">
<Expander.Header>
<!-- … -->
</Expander.Header>
<TreeView MinWidth="50"/>
</Expander>
<!-- … -->
</Grid>
我希望用户能够调整 TreeView
的大小。我试图将 TreeView
变形为 Grid
中的 2 列和第一列中的 GridSplitter
,但这没有用。有人知道如何让它发挥作用吗?
附言:只有 XAML 的答案会很棒。
最佳答案
您可以使用 Expander.Collapsed 和 Expander.Expanded 事件作为附加事件来解决您的问题。我现在没有只使用 Xaml 的想法,但以下代码在我的情况下效果很好。
Xaml
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow">
<Grid Expander.Collapsed="Grid_Collapsed" Expander.Expanded="Grid_Expanded">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<!-- … -->
</Grid.RowDefinitions>
<TextBlock Grid.Column="0" TextWrapping="Wrap">
This should be allways visible, even if the expander isn’t expanded!
</TextBlock>
<GridSplitter HorizontalAlignment="Right" VerticalAlignment="Stretch" Width="2" />
<Expander Background="Yellow" ExpandDirection="Left" Grid.Column="1">
<Expander.Header>test</Expander.Header>
<TreeView MinWidth="50"/>
</Expander>
<!-- … -->
</Grid>
</Window>
代码隐藏
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private GridLength _rememberWidth = GridLength.Auto;
private void Grid_Collapsed(object sender, RoutedEventArgs e)
{
var grid = sender as Grid;
if(grid != null)
{
_rememberWidth = grid.ColumnDefinitions[1].Width;
grid.ColumnDefinitions[1].Width = GridLength.Auto;
}
}
private void Grid_Expanded(object sender, RoutedEventArgs e)
{
var grid = sender as Grid;
if (grid != null)
{
grid.ColumnDefinitions[1].Width = _rememberWidth;
}
}
}
关于wpf - 如何调整 Expander.Content 的大小?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7620954/