ItemsControl中按钮的WPF命令参数

Question

我正在使用MVVM设计模式开发WPF应用程序.在应用程序中,我有一个ItemsControl,它显示了几个按钮(根据应用程序的逻辑流程,按钮数量不是恒定的).ItemsControl绑定到ViewModel中的LinkedList.我能够为Buttons定义一个Command,只有在Command没有参数的情况下我才能在ViewModel中获取Command处理程序......我需要能够知道哪个按钮被点击了,因此我想要带参数的命令.

我如何定义我的视图？CommandParameter的语法是什么,我可以使用哪个参数来获取Button内容？ViewModel中的Command签名是什么？

请注意,我正在使用MVVM Light中的RelayCommand.View的relvant代码就在这里.提前致谢

<UserControl x:Class="Museum.Controls.CategoriesView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="130" d:DesignWidth="418">
    <UserControl.Resources>
        <DataTemplate x:Key="CategoriesButtonsTemplate">
            <Button Content="{Binding }" 
                    Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}, Path=DataContext.CategorySelectedCommand}" 
                    />
        </DataTemplate>
    </UserControl.Resources>
    <Grid ShowGridLines="True">
        <Grid.RowDefinitions>
            <RowDefinition Height="50"></RowDefinition>
            <RowDefinition Height=" 40"></RowDefinition>
            <RowDefinition Height=" 40"></RowDefinition>
        </Grid.RowDefinitions>
        <Grid x:Name="SubSubjectGrid" Grid.Row="0"></Grid>
        <Grid x:Name="CategoriesGrid" Grid.Row="1">
            <ItemsControl Grid.Row="1" 
                  ItemsSource="{Binding Path=CategoriesButtons}" 
                  ItemTemplate="{StaticResource CategoriesButtonsTemplate}" >
                <ItemsControl.ItemsPanel>
                    <ItemsPanelTemplate>
                        <StackPanel Orientation="Horizontal"  HorizontalAlignment="Stretch"/>
                    </ItemsPanelTemplate>
                </ItemsControl.ItemsPanel>
            </ItemsControl>
     </Grid>
        <Grid x:Name="SelectedCategoryGrid" Grid.Row="2"></Grid>
    </Grid>  
</UserControl>

Answer 1

您可以像这样简单地使用CommandParameter ="{Binding}"

       <DataTemplate x:Key="CategoriesButtonsTemplate">
        <Button Content="{Binding }" 
                Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}, Path=DataContext.CategorySelectedCommand}" 
                CommandParameter="{Binding }" 
                />
    </DataTemplate>