wpf 用户自定义事件传参

//自定义传参 ，对外联系的参数
public class ImageZoomChangedEventArgs : RoutedEventArgs
{
/// <summary>
/// 放大倍数，1：原始尺寸
/// </summary>
public int Zoom { get; set; }
public ImageZoomChangedEventArgs(RoutedEvent routedEvent, int value) : base(routedEvent)
{
this.Zoom = value;
}
}//用户自定义事件
public delegate void ZoomChangedEventHandler(object sender, EventArgs e);
public event ZoomChangedEventHandler ZoomChanged
{
add
{
this.AddHandler(ZoomChangedEvent, value);
} remove
{
this.RemoveHandler(ZoomChangedEvent, value);
}
}
public static readonly RoutedEvent ZoomChangedEvent = EventManager.RegisterRoutedEvent("ZoomChanged", RoutingStrategy.Bubble, typeof(ZoomChangedEventHandler), typeof(HZImageViewerEx)); //触发自定义事件
void OnPreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
this.RaiseEvent(new ImageZoomChangedEventArgs(ZoomChangedEvent, (int)slider.Value));
}//外部接收的事件处理方法
private void img_ZoomChanged(object sender, EventArgs e)
{
var args = (ImageZoomChangedEventArgs)e;
if(args.Zoom!=)
{
....
}
}