toolkit:Accordion DataTemplate ListBox TextBlock Interaction.Triggers

困扰好几个小时的问题终于解决了，本人系菜鸟，使用MVVM设计模式，绑定DataTemplate的Command，需要使用

DataContent的资源,否则无法触发ICommand ClickChildMenu

下面是关键代码：

<TextBlock   Text="{Binding Title}" FontSize="12" >
                                        <i:Interaction.Triggers>
                                            <i:EventTrigger EventName="MouseLeftButtonUp"  >
                                                <i:InvokeCommandAction
                                                    Command="{Binding ElementName=LayoutRoot,
                                                    Path=DataContext.ClickChildMenu}"
                                                    CommandParameter="{Binding}"   />
                                            </i:EventTrigger>
                                        </i:Interaction.Triggers>
                                    </TextBlock>

<toolkit:Accordion x:Name="theList" SelectionMode="ZeroOrOne"  HorizontalAlignment="Stretch" VerticalAlignment="Stretch" FontSize="12"  ItemsSource="{Binding Catalog}">
                <toolkit:Accordion.ItemTemplate>
                    <DataTemplate>
                        <StackPanel>
                            <TextBlock Text="{Binding CatalogName}" FontSize="12"  />
                        </StackPanel>
                    </DataTemplate>
                </toolkit:Accordion.ItemTemplate>
                <toolkit:Accordion.ContentTemplate>
                    <DataTemplate>
                        <ListBox x:Name="mListBox" ItemsSource="{Binding ChildMenus}" BorderThickness="0" >
                            <ListBox.ItemTemplate>
                                <DataTemplate>
                                    <TextBlock   Text="{Binding Title}" FontSize="12" >
                                        <i:Interaction.Triggers>
                                            <i:EventTrigger EventName="MouseLeftButtonUp"  >
                                                <i:InvokeCommandAction
                                                    Command="{Binding Source={StaticResource vm},
                                                    Path=ClickChildMenu}"
                                                    CommandParameter="{Binding}"   />
                                            </i:EventTrigger>
                                        </i:Interaction.Triggers>
                                    </TextBlock>
                                </DataTemplate>
                            </ListBox.ItemTemplate>

                        </ListBox>
                    </DataTemplate>
                </toolkit:Accordion.ContentTemplate>
            </toolkit:Accordion>