谢谢您的帮助！！终于我明白了。使用VisualTreeHelper解决了该问题。多么出色的功能^^
private void ContactListBox_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (ContactListBox.SelectedIndex == -1) return; currentSelectedListBoxItem = this.ContactListBox.ItemContainerGenerator.ContainerFromIndex(ContactListBox.SelectedIndex) as ListBoxItem; if (currentSelectedListBoxItem == null) return; // Iterate whole listbox tree and search for this items TextBox nameBox = helperClass.FindDescendant<TextBox>(currentSelectedListBoxItem); TextBlock nameBlock = helperClass.FindDescendant<TextBlock>(currentSelectedListBoxItem);辅助功能
public T FindDescendant<T>(DependencyObject obj) where T : DependencyObject { // Check if this object is the specified type if (obj is T) return obj as T; // Check for children int childrenCount = VisualTreeHelper.GetChildrenCount(obj); if (childrenCount < 1) return null; // First check all the children for (int i = 0; i < childrenCount; i++) { DependencyObject child = VisualTreeHelper.GetChild(obj, i); if (child is T) return child as T; } // Then check the childrens children for (int i = 0; i < childrenCount; i++) { DependencyObject child = FindDescendant<T>(VisualTreeHelper.GetChild(obj, i)); if (child != null && child is T) return child as T; } return null; }
