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爲什麼觸發器集合不允許除事件觸發器之外的數據觸發器和其他觸發器?爲什麼觸發器集合不允許數據觸發器
<StackPanel Orientation="Horizontal">
<Label Name="LblHeader"
Margin="10,0,10,0"
Content="Test"
FontWeight="Bold"
Foreground="SteelBlue" />
<Button Name="BtnAttach" Content="_Attach"/>
<StackPanel.Triggers>
<DataTrigger Binding="{Binding IsEnabled, RelativeSource={RelativeSource FindAncestor, AncestorType=StackPanel }}" Value="False">
<Setter TargetName="LblHeader" Property="Label.Foreground" Value="Gray" />
</DataTrigger>
</StackPanel.Triggers>
</StackPanel>