ItemTemplate 中 DataContext 的访问属性 [英] Access property of DataContext in ItemTemplate

问题描述

我的数据上下文有两个属性:Items 是一个集合，DetailsVisiblity 是 Visiblity 类型的 enum.

My datacontext has two properties: Items which is a collection and DetailsVisiblity which is enum of type Visiblity.

在页面上，我有一个带有 ItemsSource="{Binding Entries}" 的 Listbox.在 DataTemplate 中，我可以将东西绑定到 Items 的属性，但是如何访问 DetailsVisiblity 这是 DataContext 的属性?

On the page I have a Listbox with ItemsSource="{Binding Entries}". Inside the DataTemplate, I can bind stuff to properties of Items, but how do I get access to DetailsVisiblity which is a property of DataContext?

DataContext 有两个属性:ObservableCollection条目 和 Visibility DetailsVisiblity.Item 类有两个属性:Title 和 Details.

DataContext has two properties: ObservableCollection<Item> Entries, and Visibility DetailsVisiblity. Item class has two properties: Title and Details.

这是视图.如何将第二个 TextBlock 的 Visiblity 绑定到 DetailsVisiblity 属性?

Here is the view. How do I bind Visiblity of the second TextBlock to DetailsVisiblity property?

<ListBox ItemsSource="{Binding Items}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding Title}" />
                <TextBlock Text="{Binding Details}" Visibility="{Binding ???}" />
            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

推荐答案

您可以命名 ListBox，并在 Binding 中使用 ElementName 引用它，在 Path 中使用 DataContext.DetailsVisibility

You could name the ListBox and in the Binding you reference it with ElementName, and in Path you use DataContext.DetailsVisibility

<ListBox x:Name="listBox" ItemsSource="{Binding Items}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Title}" />
                <TextBlock Text="{Binding Details}"
                           Visibility="{Binding ElementName=listBox,
                                                Path=DataContext.DetailsVisibilty}" />
            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

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