如何从silverlight和MVVM中的datagrid中的按钮触发事件

public class MainViewModel : ViewModelBase
{
    public ObservableCollection<Item> Items { get; set; }
    public ICommand ButtonCommand { get; set; }

    public MainViewModel()
    {
        Items = new ObservableCollection<Item>();
        ButtonCommand = new RelayCommand(ButtonClick);
    }

    private void ButtonClick(object parameter)
    {
        // 处理按钮点击事件的逻辑
    }
}

public class Item : INotifyPropertyChanged
{
    // 实现INotifyPropertyChanged接口的代码
}

<DataGrid ItemsSource="{Binding Items}">
    <DataGrid.Columns>
        <!-- 其他列定义 -->
        <DataGridTemplateColumn>
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <Button Content="Click" Command="{Binding DataContext.ButtonCommand, RelativeSource={RelativeSource AncestorType=DataGrid}}" CommandParameter="{Binding}"/>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>