在边框WPF MVVM外检测鼠标左键按下(单击)

<Border Background="Transparent" BorderBrush="Black" BorderThickness="1" Width="200" Height="100">
    <Border.InputBindings>
        <MouseBinding MouseAction="LeftClick" Command="{Binding MouseLeftClickCommand}" />
    </Border.InputBindings>
</Border>

public class MainViewModel : INotifyPropertyChanged
{
    public ICommand MouseLeftClickCommand { get; }

    public MainViewModel()
    {
        MouseLeftClickCommand = new RelayCommand(MouseLeftClick);
    }

    private void MouseLeftClick()
    {
        // 处理鼠标左键按下事件的逻辑
    }

    // 其他ViewModel代码...
}

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        DataContext = new MainViewModel();
    }
}