如何覆盖列表框的ItemTemplate并仍然保留DisplayMemberPath? [英] How can I overwrite my ListBox's ItemTemplate and still keep the DisplayMemberPath?

问题描述

我具有ListBox的通用样式，该样式会覆盖ItemTemplate以使用RadioButtons.很好，除了我设置DisplayMemberPath时.然后，我只需在ListBox中获得该项目的.ToString().

I have a generic style for a ListBox that overwrites the ItemTemplate to use RadioButtons. It works great, EXCEPT when I set a DisplayMemberPath. Then I just get the .ToString() of the item in the ListBox.

我觉得我在这里缺少一些简单的东西...有人可以帮助我发现它吗?

I feel like I'm missing something simple here... can someone help me spot it?

<Style x:Key="RadioButtonListBoxStyle" TargetType="{x:Type ListBox}">
    <Setter Property="BorderBrush" Value="Transparent"/>
    <Setter Property="KeyboardNavigation.DirectionalNavigation" Value="Cycle" />
    <Setter Property="ItemContainerStyle">
        <Setter.Value>
            <Style TargetType="{x:Type ListBoxItem}" >
                <Setter Property="Margin" Value="2, 2, 2, 0" />
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate>
                            <Border Background="Transparent">
                                <RadioButton
                                    Content="{TemplateBinding ContentPresenter.Content}" VerticalAlignment="Center"
                                    IsChecked="{Binding Path=IsSelected,RelativeSource={RelativeSource TemplatedParent},Mode=TwoWay}"/>

                            </Border>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </Setter.Value>
    </Setter>
</Style>

我的ListBox绑定到KeyValuePairs的List<T>.如果我删除了样式，则DisplayMemberPath会正确显示，因此它必须与样式有关.

My ListBox is bound to a List<T> of KeyValuePairs. If I remove the Style, the DisplayMemberPath shows up correctly so it must be something with the style.

<ListBox Style="{StaticResource RadioButtonListBoxStyle}"
         ItemsSource="{Binding MyCollection}"
         DisplayMemberPath="Value" SelectedValuePath="Key" />

推荐答案

为什么要保留DisplayMemberPath?它只是包含TextBlock的ItemTemplate的快捷方式，其中显示DisplayMemberPath中的值.有了自己的ItemTemplate，您可以更加灵活地显示内容和显示方式.

Why exactly do you want to keep DisplayMemberPath? Its just a shortcut for an ItemTemplate containing a TextBlock showing the value in DisplayMemberPath. With your own ItemTemplate you have much more flexibility what and how you want to display.

只需在ItemTemplate中添加一个TextBlock并设置Text="{Binding Value}"，您便拥有了想要的东西.

Just add a TextBlock into your ItemTemplate and set Text="{Binding Value}" and you have what you want.

如此处 :

此属性是定义默认模板的简单方法， 介绍如何显示数据对象.

This property is a simple way to define a default template that describes how to display the data objects.

DisplayMemberPath为模板提供了一种简单的方法，但是您想要一个不同的模板.您可以，也不需要.

DisplayMemberPath provides a simple way to a template, but you want a different one. You can't and you don't need both.

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