使用 TreeView 显示分层数据

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原文链接：http://www.cnblogs.com/landexia/archive/2011/03/15/1984891.html

本文介绍如何使用HierarchicalDataTemplate与TreeView控件来展示分层数据。通过具体的XAML代码示例展示了如何定义数据模板及创建TreeView结构，并提供了一个包含多层次数据的C#代码示例。

TreeView 和 TreeViewItem 控件可与 HierarchicalDataTemplate 对象一起使用以轻松显示分层数据。

创建模板

按升序声明模板。将 HierarchicalDataTemplate..::..ItemsSource 属性设置为子节点的数据源，并将 HierarchicalDataTemplate..::..ItemTemplate 属性设置为定义这些节点结构的模板。

< StackPanel.Resources >
< sdk:HierarchicalDataTemplate x:Key = " ChildTemplate " >
< TextBlock FontStyle = " Italic " Text = " {Binding Path=Title} " />
</ sdk:HierarchicalDataTemplate >
< sdk:HierarchicalDataTemplate x:Key = " NameTemplate "
ItemsSource = " {Binding Path=ChildTopics} "
ItemTemplate = " {StaticResource ChildTemplate} " >
< TextBlock Text = " {Binding Path=Title} " FontWeight = " Bold " />
</ sdk:HierarchicalDataTemplate >
</ StackPanel.Resources >

创建 TreeView 结构

创建一个 TreeView 并将其 ItemsControl..::..ItemTemplate 属性设置为最高级别的数据模板。当模板声明为资源时，最高级别的数据模板通常是最后一个声明为资源的模板。

< sdk:TreeView Width = " 400 " Height = " 300 " ItemsSource = " {Binding} "
ItemTemplate = " {StaticResource NameTemplate} " x:Name = " myTreeView " />

示例

public partial class MainPage : UserControl
{
static public ObservableCollection < Topic > Topics = new ObservableCollection < Topic > ();
public MainPage()
{
InitializeComponent();

Topics.Add( new Topic( " Using Controls and Dialog Boxes " , - 1 ));
Topics.Add( new Topic( " Getting Started with Controls " , 1 ));
Topic DataGridTopic = new Topic( " DataGrid " , 4 );
DataGridTopic.ChildTopics.Add(
new Topic( " Default Keyboard and Mouse Behavior in the DataGrid Control " , - 1 ));
DataGridTopic.ChildTopics.Add(
new Topic( " How to: Add a DataGrid Control to a Page " , - 1 ));
DataGridTopic.ChildTopics.Add(
new Topic( " How to: Display and Configure Row Details in the DataGrid Control " , 1 ));
Topics.Add(DataGridTopic);
myTreeView.DataContext = Topics;
}
}

public class Topic
{
public string Title { get ; set ; }
public int Rating { get ; set ; }
private ObservableCollection < Topic > childTopicsValue = new ObservableCollection < Topic > ();
public ObservableCollection < Topic > ChildTopics {
get
{
return childTopicsValue;
}
set
{
childTopicsValue = value;
}
}
public Topic() {}
public Topic( string title, int rating)
{
Title = title;
Rating = rating;
}
}

< StackPanel x:Name = " LayoutRoot " Background = " White " >
< StackPanel.Resources >
< sdk:HierarchicalDataTemplate x:Key = " ChildTemplate " >
< TextBlock FontStyle = " Italic " Text = " {Binding Path=Title} " />
</ sdk:HierarchicalDataTemplate >
< sdk:HierarchicalDataTemplate x:Key = " NameTemplate "
ItemsSource = " {Binding Path=ChildTopics} "
ItemTemplate = " {StaticResource ChildTemplate} " >
< TextBlock Text = " {Binding Path=Title} " FontWeight = " Bold " />
</ sdk:HierarchicalDataTemplate >
</ StackPanel.Resources >
< sdk:TreeView Width = " 400 " Height = " 300 " ItemsSource = " {Binding} "
ItemTemplate = " {StaticResource NameTemplate} " x:Name = " myTreeView " />
</ StackPanel >

转载于:https://www.cnblogs.com/landexia/archive/2011/03/15/1984891.html