WPF新手之如何獲得Template生成的控件

由Template生成的控件是無法通過x:Name來在過程代碼中獲得的，這也很好理解，因爲Template可能被應用於多處，僅僅用x:Name無法區別。那麼唯一的方法就是用FindName（查閱MSDN）。

 

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; } private void Button_Click(object sender, RoutedEventArgs e) { TreeViewItem myTreeViewItem = (TreeViewItem)(Tree.ItemContainerGenerator.ContainerFromItem(Tree.Items.CurrentItem)); ContentPresenter myContentPresenter = FindVisualChild<ContentPresenter>(myTreeViewItem); DataTemplate myDataTemplate = myContentPresenter.ContentTemplate; TextBox myTextBox = (TextBox)myDataTemplate.FindName("NameBox", myContentPresenter); MessageBox.Show("The text of the TextBox of the selected list item: " + myTextBox.Text); }

其中NameBox是Tree的模板中的一個TextBox。