定义DataTrigger为的StackPanel

问题描述

如何定义一个 DataTrigger 为的StackPanel ？它有一个触发属性，但在这里定义触发给出了初始化以下错误启动应用程序时：

How do I define a DataTrigger for a StackPanel? It does have a Trigger property, but defining a trigger here gives the following error on Initialize when starting the application:

失败的对象初始化（ISupportInitialize.EndInit）。触发集合成员必须是类型EventTrigger中的。 ......

这是从下面给出简单的 DataTrigger ：

This is given from the following simple DataTrigger:

<StackPanel x:Name="PersonPanel" DataContext="{Binding CurrentPerson}">
    <TextBlock Text="{Binding Id}" />
    <TextBlock Text="{Binding Name}" />
    <StackPanel.Triggers>
        <DataTrigger Binding="{Binding Id}" Value="1">
            <Setter TargetName="PersonPanel" Property="StackPanel.Background" Value="Green" />
        </DataTrigger>                
    </StackPanel.Triggers>
</StackPanel>

这是我的第一个触发过，所以我该怎么办错了吗？我应该定义的触发其他地方？

This is my first Trigger ever, so what do I do wrong? Should I define the Trigger elsewhere?

推荐答案

尝试像这样

   <Window.Resources>
        <Style x:Key="spStyle" TargetType="StackPanel">
            <Setter Property="StackPanel.Background" Value="Red" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding Id}" Value="1">
                    <Setter Property="StackPanel.Background" Value="Green" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>
    <StackPanel x:Name="PersonPanel" Style="{StaticResource spStyle}" DataContext="{Binding CurrentPerson}">
        <TextBlock Text="{Binding Id}" />
        <TextBlock Text="{Binding Name}" />
    </StackPanel>

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