将MainWindowViewModel中的命令绑定到UserControl中的滑块值更改事件

<Slider x:Name="slider" ValueChanged="{Binding SliderValueChangedCommand}" />

// MainWindowViewModel.cs

public class MainWindowViewModel : INotifyPropertyChanged
{
    private ICommand sliderValueChangedCommand;
    public ICommand SliderValueChangedCommand
    {
        get { return sliderValueChangedCommand; }
        set { sliderValueChangedCommand = value; NotifyPropertyChanged(); }
    }

    // 在构造函数中初始化命令
    public MainWindowViewModel()
    {
        SliderValueChangedCommand = new RelayCommand(OnSliderValueChanged);
    }

    // 处理滑块值更改事件的方法
    private void OnSliderValueChanged(object parameter)
    {
        double value = (double)parameter;
        // 执行相应的逻辑处理
    }

    // INotifyPropertyChanged接口的实现代码
    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void NotifyPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}