此示例演示如何使用
ElementName
属性将一个已实例化控件的属性绑定到另一个控件的属性。
下面的示例演示如何将
Canvas
的
Background
属性绑定到
ComboBox
的
SelectedItem.Content
属性:
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="460" Height="200"
Title="Binding the Properties of Two Controls">
<Window.Resources>
<Style TargetType="TextBlock">
<Setter Property="FontSize" Value="16"/>
<Setter Property="FontWeight" Value="Bold"/>
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="HorizontalAlignment" Value="Center"/>
</Style>
<Style TargetType="Canvas">
<Setter Property="Height" Value="50"/>
<Setter Property="Width" Value="50"/>
<Setter Property="Margin" Value="8"/>
<Setter Property="DockPanel.Dock" Value="Top"/>
</Style>
<Style TargetType="ComboBox">
<Setter Property="Width" Value="150"/>
<Setter Property="Margin" Value="8"/>
<Setter Property="DockPanel.Dock" Value="Top"/>
</Style>
</Window.Resources>
<Border Margin="10" BorderBrush="Silver" BorderThickness="3" Padding="8">
<DockPanel>
<TextBlock>Choose a Color:</TextBlock>
<ComboBox Name="myComboBox" SelectedIndex="0">
<ComboBoxItem>Green</ComboBoxItem>
<ComboBoxItem>Blue</ComboBoxItem>
<ComboBoxItem>Red</ComboBoxItem>
</ComboBox>
<Canvas>
<Canvas.Background>
<Binding ElementName="myComboBox" Path="SelectedItem.Content"/>
</Canvas.Background>
</Canvas>
</DockPanel>
</Border>
</Window>
当此示例呈现时,应如下所示:
绑定目标属性(在本例中为 Background 属性)必须是一个依赖属性。 有关详细信息,请参阅 数据绑定概述。
指定绑定源
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