可多选ListBox

1.新建一个Windows Phone Application工程，命名为MultiListBoxSample。

2.新建示例数据源。

　　在工程中添加如下的类。　

    public class SampleData
    {
        public SampleData()
        {
            items.Add("刘备");
            items.Add("关羽");
            items.Add("张飞");
            items.Add("赵云");
            items.Add("黄忠");
            items.Add("马超");
        }

        private ObservableCollection<string> _items;
        public ObservableCollection<string> items
        {
            get
            {
                if (null == _items)
                {
                    _items = new ObservableCollection<string>();
                }
                return _items;
            }
        }
    }

　　

　　在MainPage.xaml文件中添加数据源：

　　添加引用：　　

xmlns:local="clr-namespace:MultiListBoxSample"

　　

　　添加资源：

	<phone:PhoneApplicationPage.Resources>
		<local:SampleData x:Key="sampleData"/>
	</phone:PhoneApplicationPage.Resources>

3.在页面中加入一个ListBox，设置选中方式为多选，并为其指定DataContext和ItemsSource。　　

   <ListBox DataContext="{StaticResource sampleData}" ItemsSource="{Binding items}" SelectionMode="Multiple"/>

　　

4.当前已经完成了ListBox的多选功能，但是为了能直观显示，我们可以加上一个类似CheckBox的壳。

　　创建ListBoxItemStyle。如下图：

　　在模版中可以看见LayoutRoot(Border类型)和ContentContainer(ContentControl类型)。我们可以在这个模版中加上一个CheckBox，并设置该CheckBox不可点击（IsHitTestVisible="False"）如下图所示。　

　　为了使CheckBox能显示当前的选中状态，我们还需要在State中做一些处理。

　　　　SelectedUnfocused：ListBox失去焦点时的选中Item的状态

　　　　Unselected：非选中Item状态

　　　　Selected：ListBox获得焦点时的选中Item状态

　　在SelectedUnfocusd和Selected状态设置CheckBox选中，Unselected状态设置CheckBox不选中。

　　最终完成的ListBoxItemStyle代码如下：

<Style x:Key="ListBoxItemStyle1" TargetType="ListBoxItem">
	<Setter Property="Background" Value="Transparent"/>
	<Setter Property="BorderThickness" Value="0"/>
	<Setter Property="BorderBrush" Value="Transparent"/>
	<Setter Property="Padding" Value="0"/>
	<Setter Property="HorizontalContentAlignment" Value="Left"/>
	<Setter Property="VerticalContentAlignment" Value="Top"/>
	<Setter Property="Template">
		<Setter.Value>
			<ControlTemplate TargetType="ListBoxItem">
				<Border x:Name="LayoutRoot" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" VerticalAlignment="{TemplateBinding VerticalAlignment}">
				　　<VisualStateManager.VisualStateGroups>
						<VisualStateGroup x:Name="CommonStates">
							<VisualState x:Name="Normal"/>
							<VisualState x:Name="MouseOver"/>
							<VisualState x:Name="Disabled">
								<Storyboard>
									<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="LayoutRoot">
										<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TransparentBrush}"/>
									</ObjectAnimationUsingKeyFrames>
									<DoubleAnimation Duration="0" To=".5" Storyboard.TargetProperty="Opacity" Storyboard.TargetName="ContentContainer"/>
								</Storyboard>
							</VisualState>
						</VisualStateGroup>
						<VisualStateGroup x:Name="SelectionStates">
							<VisualState x:Name="Unselected">
								<Storyboard>
									<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(ToggleButton.IsChecked)" Storyboard.TargetName="checkBox">
										<DiscreteObjectKeyFrame KeyTime="0">
											<DiscreteObjectKeyFrame.Value>
												<System:Boolean>False</System:Boolean>
											</DiscreteObjectKeyFrame.Value>
										</DiscreteObjectKeyFrame>
									</ObjectAnimationUsingKeyFrames>
								</Storyboard>
							</VisualState>
							<VisualState x:Name="Selected">
								<Storyboard>
									<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentContainer">
										<DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PhoneAccentBrush}"/>
									</ObjectAnimationUsingKeyFrames>
									<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(ToggleButton.IsChecked)" Storyboard.TargetName="checkBox">
										<DiscreteObjectKeyFrame KeyTime="0">
											<DiscreteObjectKeyFrame.Value>
												<System:Boolean>True</System:Boolean>
											</DiscreteObjectKeyFrame.Value>
										</DiscreteObjectKeyFrame>
									</ObjectAnimationUsingKeyFrames>
								</Storyboard>
							</VisualState>
							<VisualState x:Name="SelectedUnfocused">
								<Storyboard>
									<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(ToggleButton.IsChecked)" Storyboard.TargetName="checkBox">
										<DiscreteObjectKeyFrame KeyTime="0">
											<DiscreteObjectKeyFrame.Value>
												<System:Boolean>True</System:Boolean>
											</DiscreteObjectKeyFrame.Value>
										</DiscreteObjectKeyFrame>
									</ObjectAnimationUsingKeyFrames>
								</Storyboard>
							</VisualState>
						</VisualStateGroup>
					</VisualStateManager.VisualStateGroups>
					<Grid>
						<Grid.ColumnDefinitions>
							<ColumnDefinition Width="Auto"/>
							<ColumnDefinition/>
						</Grid.ColumnDefinitions>
						<Grid>
							<CheckBox x:Name="checkBox" IsHitTestVisible="False"/>
						</Grid>
						<ContentControl x:Name="ContentContainer" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" d:LayoutOverrides="Width, Height" Grid.Column="1" VerticalAlignment="Center"/>
					</Grid>
				</Border>
			</ControlTemplate>
		</Setter.Value>
	</Setter>
</Style>

　　

5.完成以上步骤就完成了一个类似CheckBoxGroup的多选ListBox。

源码地址：http://dl.vmall.com/c03uvytiwf