C# WPF编程-ToggleButton

ToggleButton

在WPF中，ToggleButton是一个非常有用的控件，它允许用户在两种状态之间切换：选中（Checked）和未选中（Unchecked）。此外，还有一个中间状态叫做“不确定”（Indeterminate），但需注意的是，并不是所有的使用场景都需要或支持这个状态。下面将介绍如何使用ToggleButton，包括基本用法、样式定制以及事件处理。

<Window.Resources>
	<!-- 自定义ToggleButton样式 -->
    <Style TargetType="ToggleButton">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ToggleButton">
                    <Border Background="{TemplateBinding Background}" 
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            CornerRadius="10">
                        <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="True">
                            <Setter Property="Background" Value="LightGreen"/>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="False">
                            <Setter Property="Background" Value="LightGray"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

<StackPanel Orientation="Horizontal">
    <ToggleButton Content="切换按钮" HorizontalAlignment="Center" VerticalAlignment="Center" 
        Width="100" Height="50" IsChecked="False" Checked="ToggleButton_Changed" Unchecked="ToggleButton_Changed" Indeterminate="ToggleButton_Changed"/>
    <Label x:Name="labelToggleButtonState"/>
</StackPanel>

private void ToggleButton_Changed(object sender, RoutedEventArgs e)
{
    ToggleButton? toggleButton = sender as ToggleButton;
    if (toggleButton != null)
    {
        if (toggleButton.IsChecked == true)
        {
            labelToggleButtonState.Content = "选中状态";
        }
        else 
        {
            labelToggleButtonState.Content = "未选中状态";
        }
    }
}