网格不再调整大小

发布于 2024-07-12 10:34:26 字数 1840 浏览 1 评论 0原文

我将两个控件放在网格列中，并使第一个或第二个控件可见。由于网格列的宽度设置为自动，它将根据可见子项的宽度调整自身大小...除非我使用网格拆分器更改列的宽度。
现在，如果我切换子控件的可见性，该列将不再根据其内容调整自身大小。我怎样才能建立原来的行为？

谢谢！

编辑：
列的宽度属性是绑定到再次设置为 GridLength.Auto 的属性的数据（归功于 Martin Moser），但 Snoop 告诉我这将被忽略。所以（新）问题是我如何将列的宽度设置回自动。

编辑：
示例

启动应用程序
使用复选框切换红色面板的可见性
=> 正确调整第一列的大小
使用拆分器调整列大小
选中/取消选中复选框
=> 不再调整第一列的大小

XAML：

<Window x:Class="WpfApplication1.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300"
        Width="300">
    <Window.Resources>
        <BooleanToVisibilityConverter x:Key="CONV_KEY"></BooleanToVisibilityConverter>
    </Window.Resources>
    <Grid ShowGridLines="True">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <DockPanel Grid.Column="0" Width="100" Background="Red"
                Visibility="{Binding ElementName=_checkBox,Path=IsChecked,Converter={StaticResource CONV_KEY}}">
        </DockPanel>
        <DockPanel Grid.Column="0" Width="10" Background="Green" HorizontalAlignment="Left"></DockPanel>
        <GridSplitter Grid.Column="1" Width="10" ResizeBehavior="PreviousAndNext"></GridSplitter>
        <CheckBox x:Name="_checkBox" Grid.Column="3" VerticalAlignment="Top">Toggle</CheckBox>
    </Grid>
</Window>

原文

I put two controls in a grid column and make either the first or the second control visible. Since the width of the grid column is set to auto it will resize itself according to the width of the visible child... unless I change the width of column using a grid splitter.
Now the column does not resize itself to its content anymore if I toggle the visibility of the child controls. How can I establish the original behavior?

Thanks!

EDIT:
The width property of the column is data bound to a property that is set to GridLength.Auto again (credits to Martin Moser), but Snoop tells me that this will be ignored. So the (new) question is how I can set the width of the column back to auto.

EDIT:
An example

Start the application
Use the checkbox to toggle the visibility of the red panel
=> Correct resizing of the first column
Resize column with splitter
Check / uncheck checkbox
=> No resizing of first column anymore

XAML:

<Window x:Class="WpfApplication1.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300"
        Width="300">
    <Window.Resources>
        <BooleanToVisibilityConverter x:Key="CONV_KEY"></BooleanToVisibilityConverter>
    </Window.Resources>
    <Grid ShowGridLines="True">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <DockPanel Grid.Column="0" Width="100" Background="Red"
                Visibility="{Binding ElementName=_checkBox,Path=IsChecked,Converter={StaticResource CONV_KEY}}">
        </DockPanel>
        <DockPanel Grid.Column="0" Width="10" Background="Green" HorizontalAlignment="Left"></DockPanel>
        <GridSplitter Grid.Column="1" Width="10" ResizeBehavior="PreviousAndNext"></GridSplitter>
        <CheckBox x:Name="_checkBox" Grid.Column="3" VerticalAlignment="Top">Toggle</CheckBox>
    </Grid>
</Window>

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