递归DataTemplates是否可能?

Mat*_*len 16 wpf xaml datatemplate

我有一个类似的东西:

public class Section
{
    private IEnumerable<Section> sections;
    private IEnumerable<KeyValuePair<string, string>> attributes

    public string Name {get;set;}
    public IEnumerable<Section> Sections
    {
        get {return sections;}
    }
    public IEnumerable<KeyValuePair<string, string>> Attributes
    {
        get {return attributes;}
    }

    public Section(...)
    {
        //constructor logic
    }
}
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其中包含在另一个类中,我们OtherClass为了参数而调用它,它包装它并在ObjectDataProvider中的WPF中使用.

如您所见,一个实例Section可以包含许多其他实例Section.

在XAML中有没有办法创建一个处理这种递归的模板?

这是我到目前为止所得到的:

<UserControl x:Class="OtherClassEditor"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:OtherClassNS="clr-namespace:NameSpace"
    Height="300" Width="300">
    <UserControl.Resources>
        <ObjectDataProvider ObjectType="{x:Type OtherClassNS:OtherClass}" x:Key="ViewModel" />
        <DataTemplate x:Key="listViewAttr">
            <WrapPanel>
                <TextBlock Text="{Binding Path=Key}"></TextBlock><TextBlock Margin="0,0,4,0">: </TextBlock>
                <TextBlock Text="{Binding Path=Value}"></TextBlock>
            </WrapPanel>
        </DataTemplate>
        <DataTemplate x:Key="listViewSection">
            <StackPanel>
                <WrapPanel Margin="0,0,0,8">
                    <TextBlock Margin="0,0,4,0">Section:</TextBlock>
                    <TextBlock Text="{Binding Path=Name}"/>
                </WrapPanel>
            </StackPanel>
        </DataTemplate>
        <DataTemplate x:Key="listViewData">
            <StackPanel>
                <WrapPanel Margin="0,0,0,8">
                    <TextBlock Margin="0,0,4,0">Section: </TextBlock>
                    <TextBlock Text="{Binding Path=Name}"/>
                    <ListView DataContext="{Binding Path=Sections}" ItemTemplate="{StaticResource listViewSection}" ItemsSource="{Binding Sections}">
                    </ListView>
                    <ListView DataContext="{Binding Path=Attributes}" ItemsSource="{Binding Attributes}" ItemTemplate="{StaticResource listViewAttr}">

                    </ListView>
                </WrapPanel>
            </StackPanel>    
        </DataTemplate>
    </UserControl.Resources>
    <Grid>
        <ListView DataContext="{StaticResource ViewModel}" ItemTemplate="{StaticResource listViewData}" ItemsSource="{Binding Sections}">
        </ListView>
    </Grid>
</UserControl>
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但我不能得到递归,因为DataTemplate只能引用它之前声明的递归.

这可以在XAML中完成吗?如果是这样,怎么样?这是我在代码背后要做的事吗?

DataTemplates甚至可以走了吗?有没有更好的方法来显示和编辑这些数据?

Mat*_*len 28

如果有人需要在不使用以下情况下看到如何执行此操作HierarchicalDataTemplate:

<UserControl x:Class="OtherClassEditor"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:OtherClassNS="clr-namespace:NameSpace"
    Height="300" Width="300">
    <UserControl.Resources>
        <ObjectDataProvider ObjectType="{x:Type OtherClassNS:OtherClass}" x:Key="ViewModel" />
        <DataTemplate x:Key="listViewAttr">
            <WrapPanel>
                <TextBlock Text="{Binding Path=Key}"></TextBlock>
                <TextBlock Margin="0,0,4,0">: </TextBlock>
                <TextBlock Text="{Binding Path=Value}"></TextBlock>
            </WrapPanel>
        </DataTemplate>
        <DataTemplate x:Key="listViewData">
            <StackPanel>
                <WrapPanel Margin="0,0,0,8">
                    <TextBlock Margin="0,0,4,0">Section: </TextBlock>
                    <TextBlock Text="{Binding Path=Name}"/>
                </WrapPanel>
                <ListView ItemTemplate="{DynamicResource listViewData}" ItemsSource="{Binding Sections}" />
                <ListView ItemsSource="{Binding Attributes}" ItemTemplate="{StaticResource listViewAttr}" />
            </StackPanel>    
        </DataTemplate>
    </UserControl.Resources>
    <Grid>
        <ListView DataContext="{StaticResource ViewModel}" ItemTemplate="{DynamicResource listViewData}" ItemsSource="{Binding Sections}">
        </ListView>
    </Grid>
</UserControl>
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这基本上让我得到了我想要的东西.

主要的变化是Dan Bryant建议的:改变ItemTemplate使用动态而不是静态资源的递归对象(Section).


Mat*_*att 3

也许我误解了您的场景,但是HierarchicalDataTemplate是您正在寻找的吗?

  • HierarchicalDataTemplate 仅适用于 TreeView 和 MenuItem。我不知道为什么这是公认的答案。 (3认同)