在折叠树视图时，选择项不会得到维护

我有一个包含子项的父节点的树视图。我正在选择子节点，并且在折叠相应的父节点时，选择不被保留。在折叠树视图时，选择项不会得到维护

XAML：

<Grid> 
    <TreeView Name="trvPersons" SelectedItemChanged="trvPersons_SelectedItemChanged"> 
     <TreeView.ItemTemplate> 
      <HierarchicalDataTemplate ItemsSource="{Binding Children}"> 
       <StackPanel Orientation="Horizontal"> 
        <TextBlock Text="{Binding Name}" Margin="0,0,4,0" x:Name="txt"/> 
       </StackPanel> 
      </HierarchicalDataTemplate> 
     </TreeView.ItemTemplate> 
     <TreeView.ItemContainerStyle> 
      <Style TargetType="TreeViewItem"> 
       <Setter Property="IsSelected" Value="{Binding IsChecked}" /> 
      </Style> 
     </TreeView.ItemContainerStyle> 
    </TreeView> 
</Grid>

代码背后：

public partial class MainWindow : Window 
{ 
    public static List<Person> persons = new List<Person>(); 
    public MainWindow() 
    { 
     InitializeComponent(); 

     Person person1 = new Person() { Name = "John Doe", uniqueName="1", Age = 42 };   
     person1.Children.Add(new Person() { Name = "Sammy Doe", uniqueName = "2", parentUniqueName = "1", Age = 13 }); 
     Person person2 = new Person() { Name = "Jane Doe", uniqueName = "3", Age = 39 }; 
     person2.Children.Add(new Person() { Name = "Jenny Moe\\", uniqueName = "4", parentUniqueName = "3", Age = 17 }); 
     person2.Children.Add(new Person() { Name = "Jenny Moe", uniqueName = "5", parentUniqueName = "3", Age = 17 }); 
     Person person3 = new Person() { Name = "Becky Toe", uniqueName = "6", Age = 25 }; 
     person3.Children.Add(new Person() { Name = "Jenny Moe", uniqueName = "7", parentUniqueName = "6", Age = 17 }); 
     persons.Add(person1); 
     persons.Add(person2); 
     persons.Add(person3);  

     trvPersons.ItemsSource = persons; 
    } 

    private void trvPersons_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e) 
    { 
    } 

    public class Person : INotifyPropertyChanged 
    { 
     public List<Person> Children { get; set; } 
     public string uniqueName { get; set; } 
     public string parentUniqueName { get; set; } 

     public Person() 
     { 
      this.Children = new List<Person>(); 
     } 

     public string Name { get; set; } 
     public int Age { get; set; } 
     private bool isChecked; 

     public event PropertyChangedEventHandler PropertyChanged; 

     public void OnPropertyChanged(string propertyName) 
     { 
      if (PropertyChanged != null) 
      { 
       PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
      } 
     } 

     public bool IsChecked 
     { 
      get { return this.isChecked; } 
      set 
      { 
       this.isChecked = value; 
       if (value && !string.IsNullOrEmpty(this.parentUniqueName)) 
       { 
        persons.ForEach(i => i.IsChecked = false); 
        var p = MainWindow.persons.FirstOrDefault(i => i.uniqueName == this.parentUniqueName); 
        if (p != null) 
        { 
         p.IsChecked = true; 
        } 
       } 
       OnPropertyChanged("IsChecked"); 
      } 
     } 
    } 
}

来源

2017-02-23 Doe

提供乌尔检查代码我这个，到目前为止只有我们可以检查问题 –

很难说没有代码的问题是什么。 – RasmusW

找到示例代码 - Doe – Doe

基本上在WPF树视图中，如果您单击折叠父节点，所选的项目更改为父节点

来源

2017-02-23 09:17:19

是否有任何其他方法来保持选择？ – Doe

在折叠树视图时，选择项不会得到维护

回答

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