WPF：正确地将对象存储在TreeViewItem中 [英] WPF: Correctly storing an object in a TreeViewItem

问题描述

要在TreeViewItem中存储一个对象（比如一个类的实例），我目前将该对象存储在 TreeViewItem 的头，然后覆盖该类的 ToString 方法，以便它显示正确的字符串头;

To store an object (say, an instance of a class) in a TreeViewItem, I am currently storing the object in the TreeViewItem's Header and then overriding the ToString method of that class, so that it displays the correct string header; I then cast the object back during an event.

这是正确的方式来实现这种事情，有没有更好，更正确的方法？

Is this the correct way to achieve this sort of thing, or is there any better, more proper way ?

推荐答案

正确的方式是只需添加 （） Items 集合并使用 HierarchicalDataTemplate 来控制项目的呈现方式：

The "proper" way is to just add the object to the TreeView's (or TreeViewItem's) Items collection and use a HierarchicalDataTemplate to control how the item is rendered:

em> Person.cs ：

Person.cs:

public class Person
{
    private readonly ICollection<Person> _children = new ObservableCollection<Person>();

    public string Name { get; set; }

    public ICollection<Person> Children
    {
        get
        {
            return _children;
        }
    }
}

Window1.xaml .cs ：

public Window1()
{
    InitializeComponent();

    var people = new List<Person>();
    var kent = new Person() { Name = "Kent" };
    kent.Children.Add(new Person() { Name = "Tempany" });
    people.Add(kent);
    _treeView.ItemsSource = people;
}

Window1.xaml ：

<TreeView x:Name="_treeView">
    <TreeView.Resources>
        <HierarchicalDataTemplate DataType="{x:Type local:Person}" ItemsSource="{Binding Children}">
            <TextBlock Text="{Binding Name}"/>
        </HierarchicalDataTemplate>
    </TreeView.Resources>
</TreeView>

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