wpf自定义控件中使用自定义事件
1 创建自定义控件及自定义事件
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/// <summary> /// 演示用的自定义控件 /// </summary> public class ExtButton : Button { public ExtButton() { base.Click += ExtButton_Click; } private void ExtButton_Click(object sender, RoutedEventArgs e) { //定义传递参数 // RoutedPropertyChangedEventArgs<Object> args = new RoutedPropertyChangedEventArgs<Object>("1", "2", ControlLoadOverEvent); RoutedEventArgs args2 = new RoutedEventArgs(ControlLoadOverEvent, this); //引用自定义路由事件 this.RaiseEvent(args2); } /// <summary> /// 声明路由事件 /// 参数:要注册的路由事件名称，路由事件的路由策略，事件处理程序的委托类型(可自定义)，路由事件的所有者类类型 /// </summary> public static readonly RoutedEvent ControlLoadOverEvent = EventManager.RegisterRoutedEvent("ControlLoadOverEvent", RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventArgs<Object>), typeof(ExtButton)); /// <summary> /// 处理各种路由事件的方法 /// </summary> public event RoutedEventHandler ControlLoadOver { //将路由事件添加路由事件处理程序 add { AddHandler(ControlLoadOverEvent, value); } //从路由事件处理程序中移除路由事件 remove { RemoveHandler(ControlLoadOverEvent, value); } } } |
2 使用并绑定自定义控件的事件
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<!--i为System.Windows.Interactivity引用--> <ext:ExtButton x:Name="extButton" Content="绑定自定义事件" HorizontalAlignment="Left" Margin="123,10,0,0" VerticalAlignment="Top" Width="95"> <i:Interaction.Triggers> <i:EventTrigger EventName="ControlLoadOver"> <i:InvokeCommandAction Command="{Binding ButtonLoadOverCommand}" CommandParameter="{Binding ElementName=extButton}"></i:InvokeCommandAction> </i:EventTrigger> </i:Interaction.Triggers> </ext:ExtButton> |
3 触发自定义事件后的操作
方式1
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public DelegateCommand<Object> ButtonLoadOverCommand { get; set; } public void ButtonLoadOver(Object obj) { //这里的参数为自定义控件对象 ExtButton btn = obj as ExtButton; if (btn != null) { var content = btn.Content; } } |
方式2
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this.extButton.ControlLoadOver += ExtButton_ControlLoadOver; private void ExtButton_ControlLoadOver(object sender, RoutedEventArgs e) { var btn = (Button)e.Source; var str = btn.Content; }
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