XAML：组合框选择触发另一个组合框

Question

我尝试在 XAML 中通过另一个组合框（cb1）选择来触发组合框（cb2）和文本框（textbox）。文本框没问题，但组合框有问题。你们有办法解决我的问题吗？

    <ComboBox x:Name="cb1" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Margin="37,212,0,0">
        <ComboBoxItem Content="1"/>
        <ComboBoxItem Content="2"/>
        <ComboBoxItem Content="3"/>
    </ComboBox>
    <ComboBox x:Name="cb2" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Margin="234,212,0,0">
        <ComboBoxItem Content="a"/>
        <ComboBoxItem Content="b"/>
        <ComboBoxItem Content="c"/>
    </ComboBox>
    <TextBox x:Name="textbox"  HorizontalAlignment="Left" VerticalAlignment="Top" MaxLength="15" Width="120" Margin="234,101,0,0" Height="22">
        <TextBox.Style>
            <Style>
                <Style.Triggers>
                    <DataTrigger Binding="{Binding ElementName=cb1, Path=SelectedValue.Content}" Value="1">
                        <Setter Property="TextBox.Text" Value="test" />
                    </DataTrigger>
                    <DataTrigger Binding="{Binding ElementName=cb1, Path=SelectedValue.Content}" Value="2">
                        <Setter Property="TextBox.Text" Value="test2" />
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </TextBox.Style>
    </TextBox>

太多了，写不完

Answer 1

回答我的问题：

<ComboBox.Style>
    <Style TargetType="ComboBox">
        <Style.Triggers>
            <DataTrigger Binding="{Binding ElementName=cb1, Path=SelectedValue.Content}" Value="1">
                <Setter Property="SelectedIndex" Value="2" />
            </DataTrigger>
        </Style.Triggers>
    </Style>
</ComboBox.Style>