ListView、UserControl、DependencyProperty、ObservableCollection

我不太明白你为什么要让它变得那么复杂。您可以在没有 PersonInfo 属性且无需修改其 DataContext 的情况下轻松绑定用户控件。

<UserControl x:Class="MyApplication.MyUserControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"> 
    <TextBlock Text="{Binding Name}" /> 
</UserControl>

然后将用户控件放在没有显式绑定的数据模板中。然后，其 DataContext 将已经包含一个 Person 对象。

<DataTemplate>      
    <StackPanel>      
        <self:MyUserControl />      
    </StackPanel>      
</DataTemplate>      

虽然你解决了你的问题，但你的整个绑定代码对我来说似乎是错误的，所以我提出了这个替代方案：

为所有绑定源对象提供一个基类 - ObservableObject.cs

public abstract class ObservableObject : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        var handler = this.PropertyChanged;
        if (handler != null)
            handler(this, e);
    }
    protected void SetValue<T>(ref T field, T value, string propertyName)
    {
        if (!EqualityComparer<T>.Default.Equals(field, value))
        {
            field = value;
            this.OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
        }
    }
}

有一个主窗口的视图模型 - 主窗口模型.cs

public class MainWindowModel : ObservableObject
{
    private readonly ObservableCollection<Person> personCollection = new ObservableCollection<Person>()
    {
        new Person() { Name = "Bob", Age = 20 }
    };
    public ObservableCollection<Person> PersonCollection
    {
        get { return this.personCollection; }
    }
}

MainWindow.xaml.cs现在基本上是空的。

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }
}

MainWindow.xaml 将 DataContext 设置为新的 MainWindowModel 实例。

<Window x:Class="MyApplication.MainWindow" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:self="clr-namespace:MyApplication">
    <Window.DataContext>
        <self:MainWindowModel/>
    </Window.DataContext>
    <ListView ItemsSource="{Binding PersonCollection}">
        <ListView.ItemTemplate>
            <DataTemplate>
                <StackPanel>
                    <self:MyUserControl/>
                </StackPanel>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</Window>

MyUserControl.xaml.cs 也基本上是空的（只包含自动生成的代码）。

public partial class MyUserControl : UserControl
{
    public MyUserControl()
    {
        InitializeComponent();
    }
}

MyUserControl.xaml

<UserControl x:Class="MyApplication.MyUserControl" 
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <TextBlock Text="{Binding Name}"/>
</UserControl>

人.cs

public class Person : ObservableObject
{
    private int age;
    private string name;
    public int Age
    {
        get { return this.age; }
        set { this.SetValue(ref this.age, value, "Age"); }
    }
    public string Name
    {
        get { return this.name; }
        set { this.SetValue(ref this.name, value, "Name"); }
    }
}

将用户控件 XAML 更改为

<UserControl x:Class="MyApplication.MyUserControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006">
    <TextBlock DataContext="{Binding RelativeSource={RelativeSource AncestorType=UserControl}}"
               Text="{Binding PersonInfo.Name}" />
</UserControl>

以下是对 DataContext 问题的良好解释。