【wpf】ListView 和 ItemsControl 的一点区别

ItemsControl 实现背景间隔效果

<ItemsControl ItemsSource="{StaticResource datas}" AlternationCount="2">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <Grid Background="Transparent" Name="root">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition/>
                    <ColumnDefinition/>
                    <ColumnDefinition/>
                </Grid.ColumnDefinitions>
                <TextBlock Text="{Binding Name}"/>
                <TextBlock Text="{Binding Age}" Grid.Column="1"/>
            </Grid>
            <DataTemplate.Triggers>
                <Trigger Property="ItemsControl.AlternationIndex" Value="1">
                    <Setter Property="Background" Value="Orange" TargetName="root"/>
                </Trigger>
            </DataTemplate.Triggers>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

ListView实现背景间隔效果

listview无法直接通过DataTemplate.Triggers去设置，只能通过ItemContainerStyle的方式

<ListView ItemsSource="{StaticResource datas}" AlternationCount="2">
    <ListView.ItemContainerStyle>
        <Style TargetType="ListViewItem">
            <Style.Triggers>
                <Trigger Property="ItemsControl.AlternationIndex" Value="1">
                    <Setter Property="Background" Value="Orange"/>
                </Trigger>
                <Trigger Property="IsMouseOver" Value="True">

                </Trigger>
            </Style.Triggers>
        </Style>
    </ListView.ItemContainerStyle>
    <ListView.ItemTemplate>
        <DataTemplate>
            <Grid Background="Transparent" Name="root">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition/>
                    <ColumnDefinition/>
                    <ColumnDefinition/>
                </Grid.ColumnDefinitions>
                <TextBlock Text="{Binding Name}"/>
                <TextBlock Text="{Binding Age}" Grid.Column="1"/>
            </Grid>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

通过snoop观察，listview比ItemsControl 多封装了几层：

 

 由于多了个ListViewItem这一次，所以没法直接访问到ItemsControl.AlternationIndex

所以用了ItemContainerStyle的方式去访问。