WPF 获取ListBox子控件

[sloveb520]

<ListBox Height="166" HorizontalAlignment="Left" Margin="109,57,0,0" Name="listBox1" VerticalAlignment="Top" Width="279">
<ListBox.ItemTemplate>
<DataTemplate>
<CheckBox x:Name="cbNumber" Content="{Binding Title}" />
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>

如何选中listBox某个CheckBox，然后回车，就选中CheckBox，求解

[Sundays]

加一属性：IsSynchronizedWithCurrentItem="True"
后台：
private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (this.listBox1.SelectedItem != null)
{
ListBoxItem myListBoxItem = (ListBoxItem)(listBox1.ItemContainerGenerator.ContainerFromItem(listBox1.Items.CurrentItem));
ContentPresenter myContentPresenter = FindVisualChild<ContentPresenter>(myListBoxItem);
DataTemplate myDataTemplate = myContentPresenter.ContentTemplate;
CheckBox tempCheckBox = (CheckBox)myDataTemplate.FindName("cbNumber", myContentPresenter);

if (tempCheckBox != null)
{
tempCheckBox.IsChecked = true;
}
}
}
private childItem FindVisualChild<childItem>(DependencyObject obj)
where childItem : DependencyObject
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(obj, i);
if (child != null && child is childItem)
return (childItem)child;
else
{
childItem childOfChild = FindVisualChild<childItem>(child);
if (childOfChild != null)
return childOfChild;
}
}
return null;
}

[sloveb520]

[Quote=引用 2 楼 studyregister 的回复:]
加一属性：IsSynchronizedWithCurrentItem="True"
后台：
private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (this.listBox1.SelectedItem != null)
{
ListBoxItem……
[/Quote]

如果我多添加几个checkBox，他只能获取第一个，找不到后面的，这是什么原因啊

[sloveb520]

[Quote=引用 2 楼 studyregister 的回复:]
加一属性：IsSynchronizedWithCurrentItem="True"
后台：
private void listBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (this.listBox1.SelectedItem != null)
{
ListBoxItem……
[/Quote]

哦 可以了谢谢 没添加那个属性