WPF ListBox(ListView) 增加定义 Button 项，获取SelectedValue

private void Button1_Click(object sender, RoutedEventArgs e)
 { 
var curItem = ((ListBoxItem)lvQueue.ContainerFromElement((Button)sender)).Content; 
DataRowView drv = curItem as DataRowView;
 MessageBox.Show(drv[0].ToString());
 }