WPF:尝试根据组合框中的选定内容更改可见性

<ComboBox x:Name="comboBox" SelectedIndex="0">
    <ComboBoxItem Content="选项1" />
    <ComboBoxItem Content="选项2" />
    <ComboBoxItem Content="选项3" />
</ComboBox>

<TextBox x:Name="textBox" Visibility="Collapsed" Text="可见性已更改" />
<Button x:Name="button" Visibility="Collapsed" Content="按钮" />

<ComboBox x:Name="comboBox" SelectedIndex="0">
    <ComboBoxItem Content="选项1" />
    <ComboBoxItem Content="选项2" />
    <ComboBoxItem Content="选项3" />
</ComboBox>

<TextBox x:Name="textBox" Text="可见性已更改">
    <TextBox.Style>
        <Style TargetType="TextBox">
            <Setter Property="Visibility" Value="Collapsed" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding ElementName=comboBox, Path=SelectedIndex}" Value="1">
                    <Setter Property="Visibility" Value="Visible" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </TextBox.Style>
</TextBox>

<Button x:Name="button" Content="按钮">
    <Button.Style>
        <Style TargetType="Button">
            <Setter Property="Visibility" Value="Collapsed" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding ElementName=comboBox, Path=SelectedIndex}" Value="2">
                    <Setter Property="Visibility" Value="Visible" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>