C# 如何在ViewModel中捕获动态按钮单击

我通过绑定ObservableCollection创建了一组按钮

在我的ViewModel中，我希望捕获单击事件

对于我通常使用的按钮：

RelayCommand launchCommand;

public ICommand LaunchCommand{
    get{
        if (launchCommand == null){
            launchCommand = new RelayCommand(LaunchCommandExecute, CanLaunchCommandExecute);
        }
        return launchCommand;
    }
}

private void LaunchCommandExecute(object parameter){
    //Do something to recognize the button.
    //Could use ObservableCollection<Module> module_objects
    //to match, if I could get the buttons content or name
}

private bool CanLaunchCommandExecute(object parameter){
    return true;
}

---

参数

由

命令参数

设置。在这种情况下，只需将其绑定到“ModuleName”：

---

（请注意，您也可以使用

{Binding RelativeSource={RelativeSource Self}，Path=Tag}

将

CommandParameter

设置为按钮的标记或内容，但在这种情况下，这是一种迂回的方法。）

奇怪的是，我发现我的LaunchCommand没有启动。我进行了编辑，包括XAML。你能看到什么奇怪的东西吗？

<Button Tag="{Binding ModuleName}" Content="{Binding ModuleAbbreviation}" Command="{Binding LaunchCommand}" IsEnabled="{Binding ModuleDisabled}" Style="{DynamicResource LauncherButton}" Background="{Binding ModuleColor}" />

<UserControl.DataContext>
    <viewmodel:LauncherViewModel />
</UserControl.DataContext>
<Grid >
    <ItemsControl ItemsSource="{Binding Source={x:Static m:ModuleKey._module_objects}}" >
        <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate>
                <my:AlignableWrapPanel HorizontalAlignment="Stretch" Name="alignableWrapPanel1" VerticalAlignment="Center" HorizontalContentAlignment="Center" />
            </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <StackPanel Margin="10">
                    <Button Content="{Binding ModuleAbbreviation}" Command="{Binding LaunchCommand}" CommandParameter="{Binding ModuleName}" IsEnabled="{Binding ModuleDisabled}" Style="{DynamicResource LauncherButton}" Background="{Binding ModuleColor}" FontSize="32" FontFamily="Tahoma" Width="130" Height="100" />
                </StackPanel>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>
</Grid>

Command="{Binding DataContext.LaunchCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"

<Button Command="{Binding LaunchCommand}" CommandParameter="{Binding ModuleName}" ...

private void LaunchCommandExecute(object parameter){
    string moduleName = parameter as string;
    // ...
}