ListView绑定了一个List<>集合，有没有方法找到集合某一项对应的ListViewItem中的控件
可能表达的不清楚用，结合一下代码应该清楚点。

如果我想找UserList[3]对应ListView列表中的<Grid MouseLeftButtonDown="RestAuthCode" 这个元素的话应该如何找？还有如果我在ListView中单击了某行的按钮，如何查的该行对应的UserList是集合中的哪一个？求助高人解答，谢谢

xaml:

<ListView Margin="0,10,0,0" Grid.Row="1" ItemsSource="{Binding Path=UserList}">

                <ListView.ItemsPanel>

                    <ItemsPanelTemplate>

                        <WrapPanel Orientation="Vertical" />

                    </ItemsPanelTemplate>

                </ListView.ItemsPanel>

                <ListView.ItemTemplate>

                    <DataTemplate>

                        <StackPanel Margin="8" Orientation="Horizontal">

                            <StackPanel>

                                <TextBlock Margin="0,31,0,9" Foreground="#ffbbbbbb" Text="{Binding Path=UserName,Mode=OneTime}" Width="120" />

                                <CheckBox HorizontalAlignment="Center" Content="xxx" IsChecked="True" />

                            </StackPanel>

                            <StackPanel>

                                <ComboBox Margin="8,28,8,5" Height="23" Width="90" Text="{Binding Path=BuyVersion,Mode=OneWayToSource}">

                                </ComboBox>

                                <CheckBox HorizontalAlignment="Center" Content="bbb" IsChecked="True" />

                            </StackPanel>

          &