//自定義傳參 ，對外聯系的參數 public class ImageZoomChangedEventArgs : RoutedEventArgs{/// <summary>/// 放大倍數，1：原始尺寸/// </summary>public int Zoom { get; set; }public ImageZoomChangedEventArgs(RoutedEvent routedEvent, int value) : base(routedEvent){this.Zoom = value;}}//用戶自定義事件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));//觸發自定義事件void OnPreviewMouseWheel(object sender, MouseWheelEventArgs e){this.RaiseEvent(new ImageZoomChangedEventArgs(ZoomChangedEvent, (int)slider.Value));}//外部接收的事件處理方法 private void img_ZoomChanged(object sender, EventArgs e) {var args = (ImageZoomChangedEventArgs)e; if(args.Zoom!=1) {.... }}

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轉載于:https://www.cnblogs.com/zsx-blog/p/8193618.html

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