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WPF Litbox样式和模板

1、在项目中使用ListBox时,经常会将ItemContainerStyle和ItemTemplate的作用搞混,ItemTemplate可以搞定一切好似ItemContainerStyle有点多余。我们再来看下ItemContainerStyle和ItemTemplate。 ItemContainerStyle用于给每个Item的容器定义样式,其类型是Style。包含了操作Item的Triggers。 ItemTemplate是每个Item的现实样式,其类型是DataTemplate

在实际应用中,我们往往需要根据用户操作不断的改变ListBox中Items的显示样式。这里 总结一下ListBox中3种应用场景中的最优解决方案。

A.选中Item时改变Item项的背景颜色。

S.在 ItemContainerStyle中写ControlTemplate的样式给定背景色,使用Trigger在Selected为True时改变背景色,代码如下:

        <Style x:Key="containerstyle1" TargetType="{x:Type ListBoxItem}">

            <Setter Property="Template" >

                <Setter.Value>

                    <ControlTemplate TargetType="{x:Type ListBoxItem}">

                        <Border x:Name="b1" Background="Red">

                            <ContentPresenter></ContentPresenter>

                        </Border>

                        <ControlTemplate.Triggers>

                            <Trigger Property="IsSelected" Value="http://www.mamicode.com/True">

                                <Setter Property="Background" Value="http://www.mamicode.com/Green" TargetName="b1"></Setter>

                            </Trigger>

                        </ControlTemplate.Triggers>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style> 

B. 选中Item时改变Item项的部分显示。

S. 使用改变变量的方式,代码如下:

         <Style x:Key="containerstyle1" TargetType="{x:Type ListBoxItem}">

            <Setter Property="Template" >

                <Setter.Value>

                    <ControlTemplate TargetType="{x:Type ListBoxItem}">

                        <Border x:Name="b1" Background="Red">

                            <Label x:Name="l1" Margin="5" Content="{Binding A1}" FontSize="26" Foreground="DarkBlue"></Label>

                        </Border>

                        <ControlTemplate.Triggers>

                            <Trigger Property="IsSelected" Value="http://www.mamicode.com/True">

                                <Setter Property="Content" Value="http://www.mamicode.com/{Binding A2}" TargetName="l1"></Setter>

                            </Trigger>

                        </ControlTemplate.Triggers>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

C. 选中Item时需要完全改变Item呈现的样式,如圆形变成矩形等等。 

S. 改变Item项的DataTemplate,代码如下:

            <DataTemplate x:Key="ItemTemplate" DataType="{x:Type ListBoxItem}">... </DataTemplate>

            <DataTemplate x:Key="SelectedTemplate" DataType="{x:Type ListBoxItem}">... </DataTemplate> 

            <Style x:Key="SeatListStyle" TargetType="{x:Type ListBoxItem}">

                <Setter Property="Template">

                    <Setter.Value>

                        <ControlTemplate TargetType="{x:Type ListBoxItem}">

                            <ContentPresenter></ContentPresenter>

                            <ControlTemplate.Triggers>

                                <Trigger Property="IsSelected" Value="http://www.mamicode.com/True">

                                    <Setter Property="ContentTemplate" Value="http://www.mamicode.com/{StaticResource SelectedTemplate}" />

                                </Trigger>

                            </ControlTemplate.Triggers>

                        </ControlTemplate>

                    </Setter.Value>

                </Setter>

                <Setter Property="ContentTemplate" Value="http://www.mamicode.com/{StaticResource ItemTemplate}"></Setter>

            </Style> 

2、使用举例

<ListBox                  Name="ChangeAdListbox"                 Grid.Row="0"                Background="#77000000"                                        VerticalAlignment="Bottom"                 HorizontalAlignment="Right"                    ItemsSource="{Binding Items,ElementName=flipview}"                SelectionChanged="ChangeAdListbox_SelectionChanged"                Margin="0,0,20,5" d:IsHidden="True"                                 >                <ListBox.ItemsPanel>                    <ItemsPanelTemplate>                        <StackPanel Orientation="Horizontal"/>                    </ItemsPanelTemplate>                </ListBox.ItemsPanel>                <ListBox.ItemContainerStyle>                    <Style TargetType="ListBoxItem">                        <Setter Property="Background" Value="White"/>                        <Setter Property="Width" Value="12"/>                        <Setter Property="Height" Value="12"/>                        <Setter Property="Margin" Value="4"/>                        <Setter Property="Template">                            <Setter.Value>                                <ControlTemplate TargetType="ListBoxItem">                                    <Border x:Name="bd" BorderThickness="1" BorderBrush="White" Background="{TemplateBinding Background}">                                    </Border>                                    <ControlTemplate.Triggers>                                        <Trigger Property="IsSelected" Value="True">                                            <Setter Property="Background" Value="SkyBlue"/>                                        </Trigger>                                    </ControlTemplate.Triggers>                                </ControlTemplate>                            </Setter.Value>                        </Setter>                    </Style>                </ListBox.ItemContainerStyle>            </ListBox>

WPF Litbox样式和模板