ListView.ItemTempate和ListViewItem.Template之间的区别

Question

我有ListView，这对我有用。

    <ListView x:Name="calendar" Grid.Column="1" Grid.Row="2" 
                       AllowDrop="True"
                       SelectionMode="Single" 
                       MouseMove="kal_MouseMove" 
                       MouseUp="kal_MouseUp" 
                       ItemsSource="{Binding CinnostiNaTyden}"
                       SelectedItem="{Binding SelectedCinnost}"
                       Datum="{Binding Datum}"
                       NasledujiciTydenCommand="{Binding NasledujiciTydenCommand}"
                       PredchoziTydenCommand="{Binding PredchoziTydenCommand}" 
                       ItemAddedCommand="{Binding ItemAddedCommand}" 
                       DragEnter="kal_DragEnter" 
                       DragOver="kal_DragOver"
                       Drop="kal_Drop" 
                       >
        <ListView.InputBindings>
            <KeyBinding Key="Delete" Command="{Binding DeleteCommand}" />
        </ListView.InputBindings>
        <ListView.ItemTemplate>
            <DataTemplate>
                <Grid Grid.Column="{Binding DatumCas, Converter={StaticResource ColumnConverter}}" 
                      Grid.Row="{Binding DatumCas, Converter={StaticResource RowConverter}, Mode=TwoWay}"
                      Grid.RowSpan="{Binding Trvani, Converter={StaticResource RowSpanConverter}, Mode=TwoWay}" 
                      MouseDown="Grid_MouseDown">
                    <TextBlock Text="{Binding Popis}" 
                           Padding="5,2,0,0" 
                           FontWeight="Bold" 
                           TextWrapping="Wrap" />
                    <!--<Label Content="{Binding Trvani}" HorizontalAlignment="Center" VerticalAlignment="Center" />-->
                    <Label Cursor="SizeNS" Height="5" Background="#00000000" VerticalAlignment="Bottom" HorizontalAlignment="Stretch" MouseDown="LabelSpodni_MouseDown" Margin="0,0,0,-2"/>
                    <Label Cursor="SizeNS" Height="5" Background="#00000000" VerticalAlignment="Top" HorizontalAlignment="Stretch" MouseDown="LabelHorni_MouseDown" Margin="0,-2,20,0"/>
                </Grid>
            </DataTemplate>
        </ListView.ItemTemplate>
        <ListView.Resources>
            <Style TargetType="{x:Type ListViewItem}">
                <!--<Setter Property="FocusVisualStyle" Value="{x:Null}"/>-->
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type ListViewItem}">
                            <Border CornerRadius="5" 
                                    BorderThickness="2" 
                                    BorderBrush="DodgerBlue"
                                    Background="#CC4f9dea" 
                                    FocusVisualStyle="{x:Null}" 
                                    Margin="0,0,22,2"  
                                    x:Name="Bd" 
                                    Padding="0,0,0,0" 
                                    SnapsToDevicePixels="true">
                                <Grid>
                                    <ContentPresenter HorizontalAlignment="Stretch" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Stretch" />
                                    <Button x:Name="btnClose"
                                            Opacity="0"
                                            Content="X" 
                                            Command="{Binding DeleteCommand}" 
                                            HorizontalAlignment="Right" VerticalAlignment="Top" 
                                            Padding="0,0,0,0"
                                            HorizontalContentAlignment="Center" VerticalContentAlignment="Center"
                                            Height="20" Width="20"
                                            Style="{StaticResource RoundedButtonStyle}"
                                            FontWeight="Bold" 
                                            FontFamily="Consolas" 
                                            Cursor="Hand"/>
                                </Grid>
                            </Border>
                            <ControlTemplate.Triggers>
                                <Trigger Property="IsMouseOver" Value="True">
                                    <Setter Property="Background" TargetName="Bd" Value="#CC4f9dea" />
                                    <Setter Property="Tag" TargetName="btnClose" Value="Visible" />
                                </Trigger>
                                <MultiTrigger>
                                    <MultiTrigger.Conditions>
                                        <Condition Property="Selector.IsSelectionActive" Value="True" />
                                        <Condition Property="IsSelected" Value="True" />
                                    </MultiTrigger.Conditions>
                                    <Setter Property="Background" TargetName="Bd" Value="#cc96c0ea" />
                                </MultiTrigger>
                            </ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </ListView.Resources>
    </ListView>

现在看：

首先我像这样设置ListView.ItemTemplate：

<ListView.ItemTemplate>
    <DataTemplate>
        <Grid>
            ...
        </Grid>
    </DataTemplate>
</ListView.ItemTemplate>

然后我设置了这个：

<ListView.Resources>
    <Style TargetType="{x:Type ListViewItem}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ListViewItem}">
                    <Border CornerRadius="5" Name="Bd">
                        <Grid>
                            <ContentPresenter/>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Background" TargetName="Bd" Value="#CC4f9dea" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ListView.Resources>

首先，我设置ListView.ItemTemplate，然后为Template的{​​{1}}设置TargetType。首先是ListViewItem，第二个是DataTemplate。但ControlTemplate和ListView.ItemTemplate之间有什么区别？

Answer 1

  

但ListView.ItemTemplate和ListViewItem.Template之间有什么区别？

ItemTemplate是DataTemplate，适用于ItemsSource的{​​{1}}中的每个项目。 ListView的根元素在运行时隐式包装在ItemTemplate容器中，并且此容器具有默认样式，默认样式为ListViewItem，用于定义容器的默认外观。

通过定义设置容器的ControlTemplate属性的ListViewItem样式，您可以使用自己的自定义模板“覆盖”此默认模板。这就是为什么您在使用问题中的最后一个自定义Template选择项目时不会获得任何突出显示的原因。