WPF实现slide控件拖动完成后改变变量值

  public class SliderIgnoreDelta : Slider
  {
    public int FinalValue
    {
      get { return (int)GetValue(FinalValueProperty); }
      set { SetValue(FinalValueProperty, value); }
    }

    public static readonly DependencyProperty FinalValueProperty =
      DependencyProperty.Register(
        "FinalValue", typeof(int), typeof(SliderIgnoreDelta),
        new FrameworkPropertyMetadata(0,
          FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnFinalValueChanged));

    private static void OnFinalValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
      int result;
      if (int.TryParse(e.NewValue.ToString(), out result))
      {
        if (((SliderIgnoreDelta) sender).Value != result)
        {
          ((SliderIgnoreDelta) sender).Value = result;
        }
      }
    }

    protected override void OnThumbDragCompleted(System.Windows.Controls.Primitives.DragCompletedEventArgs e)
    {
      base.OnThumbDragCompleted(e);
      FinalValue = (int)Value;
    }
　　}

  public class SliderIgnoreDelta : Slider
  {
    public int FinalValue
    {
      get { return (int)GetValue(FinalValueProperty); }
      set { SetValue(FinalValueProperty, value); }
    }

    public static readonly DependencyProperty FinalValueProperty =
      DependencyProperty.Register(
        "FinalValue", typeof(int), typeof(SliderIgnoreDelta),
        new FrameworkPropertyMetadata(0,
          FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnFinalValueChanged));

    private static void OnFinalValueChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
      int result;
      if (int.TryParse(e.NewValue.ToString(), out result))
      {
        if (((SliderIgnoreDelta) sender).Value != result)
        {
          ((SliderIgnoreDelta) sender).Value = result;
        }
      }
    }

    public bool IsDragging { get; protected set; }
    protected override void OnThumbDragCompleted(System.Windows.Controls.Primitives.DragCompletedEventArgs e)
    {
      IsDragging = false;
      base.OnThumbDragCompleted(e);
      OnValueChanged(Value, Value);
    }

    protected override void OnThumbDragStarted(System.Windows.Controls.Primitives.DragStartedEventArgs e)
    {
      IsDragging = true;
      base.OnThumbDragStarted(e);
    }

    protected override void OnValueChanged(double oldValue, double newValue)
    {
      if (!IsDragging)
      {
        base.OnValueChanged(oldValue, newValue);
        if (FinalValue != (int)Math.Round(Value, 0))
        {
          FinalValue = (int)Math.Round(Value, 0);
        }
      }
    }
  }