c# - WPF 嵌套绑定(bind)令人头疼 : access outer ListView with nested ListView

Question

我有这个:

<ListView ItemsSource="{Binding MyFirstCollection} >
    <ListView.View>
        <GridView>
            <GridViewColumn>
                 <GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <ListView ItemsSource="{Binding DataContext.MyOtherCollection, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}" >
                            <GridView>
                            <GridViewColumn>
                                <GridViewColumn.CellTemplate>
                                    <DataTemplate>
                                        <CheckBox Content="{Binding}">

                                            <!-- the error is in here somewhere -->
                                            <CheckBox.IsChecked>
                                                <MultiBinding Converter="{StaticResource OrderExclusionConverter}">
                                                    <Binding Path="{Binding DataContext, RelativeSource={RelativeSource FindAncestor, AncestorLevel=2, AncestorType={x:Type ListView}}}" />
                                                    <Binding Path="MemberCount.MemberCountID" />
                                                </MultiBinding>
                                            </CheckBox.IsChecked>

                                        </CheckBox>
                                    </DataTemplate>
                                </GridViewColumn.CellTemplate>
                            </GridViewColumn>
                        </GridView>                         </ListView>
                    </DataTemplate>
                </GridViewColumn.CellTemplate>
            </GridViewColumn>
        </GridView>
    </ListView.View>
</ListView>

如果我在“错误在这里的某处”，我如何获得绑定(bind)以访问 MyFirstCollection 中的当前项目？

我试过这个:

Path="{Binding DataContext, RelativeSource={RelativeSource FindAncestor, AncestorLevel=2, AncestorType={x:Type ListView}}}"

我认为这可行，但它给了我binding can only be set on a dependencyproperty of a dependencyobject 错误。

编辑:发布完整绑定(bind)

Answer 1

这个:

<Binding Path="{Binding DataContext, RelativeSource={RelativeSource FindAncestor, AncestorLevel=2, AncestorType={x:Type ListView}}}" />

错了。您不能在另一个 Binding 的 Path 属性上设置 {Binding}。你需要的是:

<Binding Path="DataContext" 
         RelativeSource="{RelativeSource AncestorType=ListView, AncestorLevel=2}"/>

问题是您似乎混淆了属性语法 和属性元素语法。您可能想在 MSDN 上阅读有关这些概念的更多信息.