Question

我正在使用HierarchicalDataTemplate动态构建我的TreeView，并且不知道如何从树视图中获取所选项目的标题。

我试图通过TreeViewItem.Selected事件获取它。

    private void TreeViewItem_OnItemSelected(object sender, RoutedEventArgs e)
    {
        TreeViewItem item = e.OriginalSource as TreeViewItem;
        string name = item.Header.ToString();
    }

但＆＃39; item.Header＆＃39;属于Node

类型

这是我的XAML代码：

<Window x:Class="MaschinenStoppScheduler.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:MyNamespace="clr-namespace:MaschinenStoppScheduler"
    Title="MaschinenStoppScheduler" Height="500" Width="900" Loaded="Window_Loaded_1">
<Window.DataContext>
    <MyNamespace:MainWindowVM />
</Window.DataContext>
<Grid>
    <TreeView x:Name="TreeViewGroups" TreeViewItem.Selected ="TreeViewItem_OnItemSelected"  
        ItemsSource="{Binding RootNodes}" HorizontalAlignment="Left" Margin="20,28,0,25" 
        VerticalAlignment="Stretch" Width="181" SelectedItemChanged="TreeViewGroups_SelectedItemChanged">
        <ItemsControl.ItemContainerStyle>
            <Style
            TargetType="{x:Type TreeViewItem}">
                <Setter Property="IsExpanded" Value="{Binding IsExpanded}" />
            </Style>
        </ItemsControl.ItemContainerStyle>
        <ItemsControl.ItemTemplate>
            <HierarchicalDataTemplate DataType="{x:Type MyNamespace:Node}" ItemsSource="{Binding Children}">
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Left">
                    <TextBlock Text="{Binding Name}" />
                </StackPanel>
            </HierarchicalDataTemplate>
        </ItemsControl.ItemTemplate>
    </TreeView>
</Grid>

Answer 1

是的，所选项目将是RootNodes中的项目之一。把它投射到那种类型。 Node，似乎是。标题将是您用于标题的类的任何属性 - Name，它看起来像。

private void TreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    var treeView = sender as TreeView;

    var selectedNode = treeView.SelectedItem as Node;

    TreeViewItem tvi = treeView.ItemContainerGenerator.ContainerFromItem(treeView.SelectedItem) as TreeViewItem;
}

Node是您绑定到ItemsSource TreeView的集合中包含的类。我还提供了演示如何获取所选TreeViewItem的代码。

WPF C＃：如何从HierarchicalDataTemplate获取treeviewitem头

1 个答案: