WPF 自定义事件

1.可传参数

namespace DrugInfo
{
    public class ChooseDrugRoutedEventArgs : RoutedEventArgs
    {
        public ChooseDrugRoutedEventArgs(RoutedEvent routedEvent, object source) : base(routedEvent, source) { }

        public string Message { get; set; }
    }
    
    public partial class ChooseDrug
    {
        //声明和注册路由事件
        public static readonly RoutedEvent ChooseDrugRoutedEvent = EventManager.RegisterRoutedEvent("ChooseDrug", RoutingStrategy.Bubble, typeof(ChooseDrugRoutedEventArgs), typeof(ChooseDrug));

        //自定义事件委托 
        public delegate void ChooseDrugRoutedEventHandler(object sender, ChooseDrugRoutedEventArgs e);

        //CLR事件包装
        public event ChooseDrugRoutedEventHandler ChooseDrugClick
        {
            add { AddHandler(ChooseDrugRoutedEvent, value); }
            remove { RemoveHandler(ChooseDrugRoutedEvent, value); }
        }
        //界面选择数据后确定
        private void Choose_OnClick(object sender, RoutedEventArgs routedEventArgs)
        {           
            
            ChooseDrugRoutedEventArgs args = new ChooseDrugRoutedEventArgs(ChooseDrugRoutedEvent, this);
            args.Message = "传数据过去";
            this.RaiseEvent(args);//UIElement及其派生类 
        }
    }
}

//调用
namespace Purchasing
{
    /// <summary>
    /// Main.xaml 的交互逻辑
    /// </summary>
    public partial class Main
    {    
        private void Control_Loaded(object sender, RoutedEventArgs e)
        {
            var popups = new ChooseDrug();
            popups.ChooseDrugClick += Popups_ChooseDrugClick;
        }
        
        private void Popups_ChooseDrugClick(object sender, ChooseDrugRoutedEventArgs e)
        {
            RadWindow.Alert(e.Message);
        }
    }
}

2.无参数，不需要自定义委托

1.可传参数

namespace DrugInfo
{
    public partial class ChooseDrug
    {
        //声明和注册路由事件
        public static readonly RoutedEvent ChooseDrugRoutedEvent = EventManager.RegisterRoutedEvent("ChooseDrug", RoutingStrategy.Bubble, typeof(EventHandler<RoutedEventHandler>), typeof(ChooseDrug));

        //CLR事件包装
        public event RoutedEventHandler ChooseDrugClick
        {
            add { AddHandler(ChooseDrugRoutedEvent, value); }
            remove { RemoveHandler(ChooseDrugRoutedEvent, value); }
        }
        //界面选择数据后确定
        private void Choose_OnClick(object sender, RoutedEventArgs routedEventArgs)
        {           
            RaiseEvent(new RoutedEventArgs(ChooseDrugRoutedEvent));
        }
    }
}

//调用
namespace Purchasing
{
    /// <summary>
    /// Main.xaml 的交互逻辑
    /// </summary>
    public partial class Main
    {    
        private void Control_Loaded(object sender, RoutedEventArgs e)
        {
            var popups = new ChooseDrug();
            popups.ChooseDrugClick += Popups_ChooseDrugClick;
        }
        
        private void Popups_ChooseDrugClick(object sender, RoutedEventArgs e)
        {
            RadWindow.Alert("OK");
        }
    }
}