<Grid><ListBox x:Name="lb"><ListBox.ItemTemplate><DataTemplate><StackPanel Orientation="Horizontal"><CheckBox x:Name="ck"></CheckBox><TextBlock x:Name="tb" Text="{Binding StuId}"></TextBlock><TextBlock Text="{Binding StuName}"></TextBlock><TextBlock Text="{Binding Sex}"></TextBlock><TextBlock Text="{Binding Pwd}"></TextBlock><Button Content="修改" Width="100" Height="30"></Button></StackPanel></DataTemplate></ListBox.ItemTemplate></ListBox><Button Content="Show" Width="100" Height="30" Click="Button_Click"></Button></Grid>

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){ListBoxItem lbitem = null;ContentPresenter myContentPresenter = null;DataTemplate myDataTemplate = null;CheckBox ck = null;TextBlock tb = null;for (int i = 0; i < lb.Items.Count; i++){lbitem = (ListBoxItem)(lb.ItemContainerGenerator.ContainerFromItem(lb.Items[i]));myContentPresenter = FindVisualChild<ContentPresenter>(lbitem);myDataTemplate = myContentPresenter.ContentTemplate;ck = (CheckBox)myDataTemplate.FindName("ck", myContentPresenter) as CheckBox;if (ck.IsChecked == true){tb = (TextBlock)myDataTemplate.FindName("tb", myContentPresenter) as TextBlock;MessageBox.Show(tb.Text);}}}

<DataGrid x:Name="dataGrid5"AutoGenerateColumns="False"AlternatingRowBackground="LightSteelBlue"RowBackground="Azure"IsReadOnly="True"><DataGrid.Columns><DataGridTemplateColumn><DataGridTemplateColumn.CellTemplate><DataTemplate><CheckBox x:Name="ck"></CheckBox></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn><DataGridTemplateColumn.CellTemplate><DataTemplate><TextBlock Text="{Binding StuName}"></TextBlock></DataTemplate></DataGridTemplateColumn.CellTemplate></DataGridTemplateColumn><DataGridTemplateColumn Header="StuName"><DataGridTemplateColumn.CellTemplate><DataTemplate><StackPanel Orientation="Horizontal" VerticalAlignment="Center"><TextBlock Padding="5,0,5,0"Text="{Binding Resume}"/></StackPanel></DataTemplate></DataGridTemplateColumn.CellTemplate><DataGridTemplateColumn.CellEditingTemplate><DataTemplate><StackPanel Orientation="Horizontal" VerticalAlignment="Center"><TextBlock Padding="5,0,5,0"Text="{Binding Resume}"/></StackPanel></DataTemplate></DataGridTemplateColumn.CellEditingTemplate></DataGridTemplateColumn></DataGrid.Columns></DataGrid>

DataGridTemplateColumn _dataTemplate = dataGrid5.Columns[0] as DataGridTemplateColumn;FrameworkElement element = null;CheckBox ck=null;for (int i = 0; i < dataGrid5.Items.Count-1; i++){element = _dataTemplate.GetCellContent(dataGrid5.Items[i]);ck=_dataTemplate.CellTemplate.FindName("ck",element) as CheckBox;if (ck.IsChecked == true){MessageBox.Show(string.Format("StuName:{0}",(dataGrid5.Items[i] as Stu).StuName));}}