如何使一个StackPanel宽度另一个StackPanel中的？

Question

我有两个dockpanels各自具有左的StackPanel。

的底部的宽度的StackPanel通过的文本的宽度确定是它

的顶部的宽度的StackPanel应的相同作为<强>底部的宽度的StackPanel。

我试图结合顶部的StackPanel经由的ElementName底部的StackPanel的宽度的宽度，但这种不工作。

<强>我怎样才能使顶部宽度相同的底部宽度吗

<StackPanel>
    <DockPanel LastChildFill="True" Height="100" >
        <StackPanel Width="{Binding ElementName=LeftMenuText, Path=Width}" 
                    DockPanel.Dock="Left"
                    Background="Yellow">
            <TextBlock
                Text="This is some text."/>
        </StackPanel>
        <StackPanel DockPanel.Dock="Right"
                    Background="Orange">
        </StackPanel>
    </DockPanel>

    <DockPanel 
        Height="3"
        Background="Black"></DockPanel>

    <DockPanel LastChildFill="True" Height="100">
        <StackPanel Name="LeftMenuWrapper"
                    DockPanel.Dock="Left"
                    Background="Yellow">
            <TextBlock 
                    Text="This is some text that is longer."/>
        </StackPanel>
        <StackPanel DockPanel.Dock="Right"
                    Background="Blue">
        </StackPanel>
    </DockPanel>
</StackPanel>

Answer 1

将其绑定到LeftMenuWrapper的ActualWidth的：

 <StackPanel>
    <DockPanel LastChildFill="True" Height="100" >
        <StackPanel Width="{Binding ElementName=LeftMenuWrapper, Path=ActualWidth}" 
                    DockPanel.Dock="Left"
                    Background="Yellow">
            <TextBlock
                Text="This is some text."/>
        </StackPanel>
        <StackPanel DockPanel.Dock="Right"
                    Background="Orange">
        </StackPanel>
    </DockPanel>

    <DockPanel 
        Height="3"
        Background="Black"></DockPanel>

    <DockPanel LastChildFill="True" Height="100">
        <StackPanel Name="LeftMenuWrapper"
                    DockPanel.Dock="Left"
                    Background="Yellow">
            <TextBlock 
                    Text="This is some text that is longer."/>
        </StackPanel>
        <StackPanel DockPanel.Dock="Right"
                    Background="Blue">
        </StackPanel>
    </DockPanel>
</StackPanel>

只需添加到您的阿森纳另一种方式来做到这一点。您还可以使用网格的IsSharedScope属性：

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   <StackPanel Grid.IsSharedSizeScope="True">
      <Grid Height="100">
         <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" SharedSizeGroup="TextHolder"/>
            <ColumnDefinition Width="*"/>
         </Grid.ColumnDefinitions>
         <Border Background="Yellow">
            <TextBlock Text="This is some text."/>
         </Border>
         <Border Grid.Column="1" Background="Orange"/>
      </Grid>
      <Border Height="3" Background="Black"/>
      <Grid Height="100">
         <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" SharedSizeGroup="TextHolder"/>
            <ColumnDefinition Width="*"/>
         </Grid.ColumnDefinitions>
         <Border Background="Yellow">
            <TextBlock Text="This is some text that is longer."/>
         </Border>
         <Border Grid.Column="1" Background="Blue"/>
      </Grid>
   </StackPanel>
</Page>

Answer 2

您可以做到这一点使用Grids与SharedSizeGroup而不是DockPanels。即。

<StackPanel Grid.IsSharedSizeScope="True">
    <Grid Height="100" >

        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" SharedSizeGroup="A"/>
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <StackPanel Grid.Column="0" Width="{Binding ElementName=LeftMenuText, Path=Width}"
                                DockPanel.Dock="Left"
                                Background="Yellow">
            <TextBlock
                    Text="This is some text."/>
        </StackPanel>
        <StackPanel Grid.Column="1" DockPanel.Dock="Right"
                                Background="Orange">
        </StackPanel>
    </Grid>

    <DockPanel
      Height="3"
      Background="Black"></DockPanel>

    <Grid Height="100">

        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" SharedSizeGroup="A"/>
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

        <StackPanel Grid.Column="0" Name="LeftMenuWrapper"
                                DockPanel.Dock="Left"
                                Background="Yellow">
            <TextBlock
                            Text="This is some text that is longer."/>
        </StackPanel>
        <StackPanel Grid.Column="1" DockPanel.Dock="Right"
                                Background="Blue">
        </StackPanel>
    </Grid>
</StackPanel>

关键的是记住，得到每一列的网格内具有相同名称（在该例子中“A”）一个SharedSizeGroup，并添加Grid.IsSharedSizeScope="True"到Grids的共享父（含在该示例中StackPanels的Grid ）