我有一个问题。我需要创建带有复选框的动态创建的 TreeListView 。我已经有了,但我需要做的是,当选择父节点时,自动选择所有子节点。我怎样才能做到这一点?这是我已经创建的代码
[xml]$xaml = @"
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="My TreeView" Height="300" Width="300">
<Grid>
<TreeView Name="MyTreeView" Margin="10">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal">
<CheckBox IsChecked="{Binding IsChecked, Mode=TwoWay}" VerticalAlignment="Center"/>
<TextBlock Text="{Binding Name}" Margin="5,0,0,0"/>
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
</Grid>
</Window>
"@
$reader=(New-Object System.Xml.XmlNodeReader $xaml)
$window=[Windows.Markup.XamlReader]::Load( $reader )
# Define the data structure for the treeview
class Node {
[string]$Name
[System.Collections.ObjectModel.ObservableCollection[Node]]$Children
[bool]$IsChecked
}
# Populate treeview with sample data
$root = New-Object Node
$root.Name = "Root"
$root.Children = New-Object System.Collections.ObjectModel.ObservableCollection[Node]
$child1 = New-Object Node
$child1.Name = "Child 1"
$child1.Children = New-Object System.Collections.ObjectModel.ObservableCollection[Node]
$child2 = New-Object Node
$child2.Name = "Child 2"
$child2.Children = New-Object System.Collections.ObjectModel.ObservableCollection[Node]
$root.Children.Add($child1)
$root.Children.Add($child2)
$treeview = $window.FindName("MyTreeView")
$treeview.ItemsSource = @($root)
$window.ShowDialog() | Out-Null
我该怎么做?
在
IsChecked
属性的setter中添加一些逻辑,设置Children
集合中所有项目的相应属性,并实现INotifyPropertyChanged
接口来通知视图:
Add-Type -TypeDefinition @"
using System.ComponentModel;
using System.Collections.ObjectModel;
public class Node : INotifyPropertyChanged {
public string Name { get; set; }
public ObservableCollection<Node> Children { get; set; }
private bool isChecked;
public bool IsChecked {
get { return isChecked; }
set {
isChecked = value;
OnPropertyChanged("IsChecked");
foreach (var node in Children)
node.IsChecked = true;
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void OnPropertyChanged(string propertyName) {
PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
"@