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  • WPF 自定义一个控件,当点击按钮是触发到ViewModel(业务逻辑部分)和Xaml路由事件(页面逻辑部分)

    region - 用于绑定ViewModel部分 -

        public ICommand Command
        {
            get { return (ICommand)GetValue(CommandProperty); }
            set { SetValue(CommandProperty, value); }
        }
    
        // Using a DependencyProperty as the backing store for MyProperty.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty CommandProperty =
            DependencyProperty.Register("Command", typeof(ICommand), typeof(MyUserControl), new PropertyMetadata(default(ICommand)));
        
        public object CommandParameter
        {
            get { return (object)GetValue(CommandParameterProperty); }
            set { SetValue(CommandParameterProperty, value); }
        }
    
        // Using a DependencyProperty as the backing store for MyProperty.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty CommandParameterProperty =
            DependencyProperty.Register("CommandParameter", typeof(object), typeof(MyUserControl), new PropertyMetadata(default(object)));
    
        public IInputElement CommandTarget { get; set; }
    
        #endregion
    

    region 用于Xaml触发路由事件部分

        //声明和注册路由事件
        public static readonly RoutedEvent MyEventRoutedEvent =
            EventManager.RegisterRoutedEvent("MyEvent", RoutingStrategy.Bubble, typeof(EventHandler<RoutedEventArgs>), typeof(MyUserControl));
        //CLR事件包装
        public event RoutedEventHandler MyEvent
        {
            add { this.AddHandler(MyEventRoutedEvent, value); }
            remove { this.RemoveHandler(MyEventRoutedEvent, value); }
        }
    
        //激发路由事件,借用Click事件的激发方法
    
        protected void OnMyEvent()
        {
            RoutedEventArgs args = new RoutedEventArgs(MyEventRoutedEvent, this);
            this.RaiseEvent(args);
        }
    
        #endregion
    

    ///

    内部触发的路由事件和自定义命令方法
    private void Button_Click(object sender, RoutedEventArgs e)
    {
    //命令作用于命令目标
    if (this.Command != null)
    {
    this.Command.Execute(CommandParameter);

                this.OnMyEvent();
            }
        }
    

    <local:MyUserControl Grid.Row="1" Command="{Binding RelayCommand}" CommandParameter="Sumit">
    local:MyUserControl.Triggers







    </local:MyUserControl.Triggers>
    </local:MyUserControl>

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  • 原文地址:https://www.cnblogs.com/LCLBook/p/11853407.html
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