DataTemplates DataContext传递给其嵌套的UserControl [英] DataTemplates DataContext passed-through to its nested UserControl

问题描述

您好，

我的情况:对于我的ListBox'ListBoxItems，我在ResourceDictionary中定义了一个DataTemplate.此DataTemplate将由TemplateSelector选择.此DataTemplate包含一个UserControl.我想显示UserControl中ListBox的ItemsSource中的数据:如何将数据从DataTemplate传递到UserControl.

我的ListBox:
< ListBox ItemsSource =" { Binding Path = aXYCollection}"

ListBox.ItemTemplateSelector<

























>我的ResourceDictionary中有什么: br>和我的UserControl:
< UserControl x:Class ="MyUserControl" />
</Grid>
</UserControl>

我希望DataContext将自动传递.但是UserControl的DataContext为null.当我直接在DataTemplate中使用Label时，它显示了属性的期望值: ; />
</DataTemplate>

但是我必须使用UserControl.如何传递DataContext?

感谢您的回答.

Hi there,

my scenario: for my ListBox' ListBoxItems I have defined in my ResourceDictionary a DataTemplate. This DataTemplate will be selected by a TemplateSelector. This DataTemplate contains a UserControl. I want to display the data from the ListBox' ItemsSource within the UserControl: how I can pass-through the data from the DataTemplate to the UserControl.

My ListBox:
<ListBox ItemsSource="{Binding Path=aXYCollection}">
    <ListBox.ItemTemplateSelector>
        <local:MyListBoxItemTemplateSelector />
    </List>
</ListBox>

What I have in my ResourceDictionary:
<DataTemplate x:Key="myTemplate">
    <uc:MyUserControl />
</DataTemplate>


And my UserControl:
<UserControl x:Class="MyUserControl">
    <Grid>
        <Label Content="{Binding MyProperty}" />
    </Grid>
</UserControl>

I hoped the DataContext will be passed-through automatically. But the DataContext of the UserControl is null. When I use the Label directly within the DataTemplate, it shows the wished value of the property:
<DataTemplate x:Key="myTemplate">
    <Label Content="{Binding MyProperty}" />
</DataTemplate>

But I have to use the UserControl. How I can pass-through the DataContext?

Thanks for your answers.

推荐答案

->但是我必须使用UserControl.我如何传递DataContext?我相信DataContext属性会正确地沿树传播，请您提供一个小而完整且可立即运行的示例，以演示如何做到这一点为您工作吗?

感谢

-> But I have to use the UserControl. How I can pass-through the DataContext?

I believe the DataContext property will get propagated down the tree correctly, could you please provide a small, complete and ready-to-run example to demonstrate how it doesn't work for you?

Thanks

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