C＃列表框内的列表框

Question

我在这样的列表框中有一个列表框。

<ListBox x:Name="listBox1">
   <ListBox.ItemTemplate>
      <DataTemplate>
         <StackPanel>
            <StackPanel.Background>
               <SolidColorBrush Color="#FF2B3643" Opacity="1"/>
            </StackPanel.Background>
            <StackPanel>
               <TextBlock Text="{Binding X}"/>
               <TextBlock Text="{Binding Y}"/>
            </StackPanel>
            <Button Click="Button_Click">
            <ListBox x:Name="listBox2">
               <ListBox.ItemTemplate>
                  <DataTemplate>
                     <StackPanel>
                        <TextBlock Text="{Binding Name}"/>
                        <TextBlock Text="{Binding Number}"/>
                     </StackPanel>
                  </DataTemplate>
               </ListBox.ItemTemplate>
            </ListBox>
         </StackPanel>
      </DataTemplate>
   </ListBox.ItemTemplate>
</ListBox>

[当我尝试绑定内部列表框时，我无法这样做。

我尝试过的C＃代码如下。

List<Person> p = new List<Person>();

Person student = new Person();
student.Name = "Name1";
student.Number = "Number1";
p.Add(student);

Person teacher = new Person();
teacher.Name = "Name2";
teacher.Number = "Number2";
p.Add(teacher);

listBox2.ItemsSource = p; // cannot access listBox2

但是我无法从xaml.cs代码访问listBox2。它说找不到listBox2。我也想仅在单击按钮时才绑定listBox2，而不是在绑定listBox1时绑定。有人可以告诉我如何访问listBox2吗？

Answer 1

诀窍是直接绑定到DataContext。我还需要找到AncestorType绑定到的UserControl的DataContext：

<ListBox ItemsSource="{Binding DialogueEntries}"
         SelectedItem="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.SelectedDialogueEntryChoice, Mode=TwoWay}">