在ListView中隐藏GroupStyle.HeaderTemplate [英] Hide GroupStyle.HeaderTemplate in ListView

问题描述

我有一个XAML ListView，它的ItemsSource绑定到一个集合，并分组在DisplayName属性上.

I have a XAML ListView that has its ItemsSource bound to a collection and is grouped on a property DisplayName.

ListView显示按钮，并且使用GroupStyle分隔按钮，如下所示.

The ListView displays buttons and the buttons are separated using GroupStyle as shown below.

我正在使用Windows 7.

I am using Windows 7.

XAML

<ControlTemplate TargetType="{x:Type myNamespace:MyClass}">
    <ListView ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type myNamespace:MyClass}}, Path=ItemsSource}">
        <ListView.Resources>
            <BooleanToVisibilityConverter x:Key="BoolToVisibility"/>
        </ListView.Resources>

        <ListView.ItemTemplate>
            <DataTemplate>
                <Button Command="{Binding}" 
                        Visibility="{Binding RelativeSource={RelativeSource Self}, Path=IsEnabled, Converter={StaticResource BoolToVisibility}}">
                    <Image Height="24" Width="24"  Source="{Binding Path=IconSource}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                </Button>
            </DataTemplate>
        </ListView.ItemTemplate>

        <ListView.GroupStyle>
            <GroupStyle>
                <GroupStyle.HeaderTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding Path=Name}" FontWeight="Bold" FontSize="14" />
                    </DataTemplate>
                </GroupStyle.HeaderTemplate>
            </GroupStyle>
        </ListView.GroupStyle>
    </ListView>        
</ControlTemplate>

每当IsEnabled = false时，该按钮就从显示中隐藏，这是预期的，但是即使没有要显示的项目，组标题仍然显示.

The button is hidden from display whenever IsEnabled=false which is as expected but the group header still is displayed even if there are no items to display.

通过谷歌搜索，我尝试了以下操作，但无济于事:

From googling around I have tried the following but to no avail:

尝试1

将 HidesIfEmpty ="True" 添加到GroupStyle:

Add HidesIfEmpty="True" to the GroupStyle:

<ListView.GroupStyle>
    <GroupStyle HidesIfEmpty="True">
        <GroupStyle.HeaderTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Path=Name}" FontWeight="Bold" FontSize="14" />
            </DataTemplate>
        </GroupStyle.HeaderTemplate>
     </GroupStyle>
 </ListView.GroupStyle>

尝试2

添加与按钮相同的可见性属性:

Add a Visibility property similar to what the Button uses: Visibility="{Binding RelativeSource={RelativeSource Self}, Path=IsEnabled, Converter={StaticResource BoolToVisibility}}"

<ListView.GroupStyle>
    <GroupStyle HidesIfEmpty="True">
        <GroupStyle.HeaderTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Path=Name}" FontWeight="Bold" FontSize="14" Visibility="{Binding RelativeSource={RelativeSource Self}, Path=IsEnabled, Converter={StaticResource BoolToVisibility}}"/>
            </DataTemplate>
        </GroupStyle.HeaderTemplate>
    </GroupStyle>
</ListView.GroupStyle>

尝试3

只需尝试绑定HeaderTemplate的根元素的可见性: Visibility =" {Binding GroupHeaderVisibility}"

Just try to bind the Visibility of the root element of HeaderTemplate: Visibility="{Binding GroupHeaderVisibility}"

<ListView.GroupStyle>
    <GroupStyle HidesIfEmpty="True">
        <GroupStyle.HeaderTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Path=Name}" FontWeight="Bold" FontSize="14" Visibility = "{Binding GroupHeaderVisibility}" />
            </DataTemplate>
        </GroupStyle.HeaderTemplate>
    </GroupStyle>
</ListView.GroupStyle>

没有按钮要显示时，如何隐藏GroupHeader.

How can I get the GroupHeader to hide when there are no Buttons to display.

推荐答案

据我所知，如果该按钮隐藏在ListViewItem上，则listViewItem仍然存在.

As far as I know, If the button is hidden on a ListViewItem, the listViewItem is still exist.

我建议您尝试过滤数据，仅绑定IsEnabled为真实数据，如下所示.

mylistView.ItemsSource = DataItems.Where(p => p.IsEnabled != false).ToList();

最好的问候，

Bob

Bob

这篇关于在ListView中隐藏GroupStyle.HeaderTemplate的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！