Prism使用消息总线打开窗体的案例（中介者模式）

弹窗事件定义：

using Prism.Events;public class ShowPopupEvent : PubSubEvent<string> { }

弹窗管理类（中介）：

using Prism.Events;
using Prism.Services.Dialogs;public class PopupManager
{private readonly IEventAggregator _eventAggregator;private readonly IDialogService _dialogService;public PopupManager(IEventAggregator eventAggregator, IDialogService dialogService){_eventAggregator = eventAggregator;_dialogService = dialogService;_eventAggregator.GetEvent<ShowPopupEvent>().Subscribe(ShowDialog);}private void ShowDialog(string dialogName){_dialogService.ShowDialog(dialogName, null, result => {});}
}

启动和IOC注入：

 Prism.Ioc;
using Prism.Modularity;
using Prism.Unity;public class Bootstrapper : PrismBootstrapper
{protected override void RegisterTypes(IContainerRegistry containerRegistry){containerRegistry.RegisterDialog<LoginDialog>("LoginDialog");containerRegistry.RegisterDialog<SettingsDialog>("SettingsDialog");containerRegistry.RegisterSingleton<PopupManager>();containerRegistry.RegisterSingleton<IEventAggregator, EventAggregator>();}
}

发布消息：

using Prism.Commands;
using Prism.Events;public class MainViewModel
{private readonly IEventAggregator _eventAggregator;public DelegateCommand ShowLoginCommand { get; }public DelegateCommand ShowSettingsCommand { get; }public MainViewModel(IEventAggregator eventAggregator){_eventAggregator = eventAggregator;ShowLoginCommand = new DelegateCommand(() => _eventAggregator.GetEvent<ShowPopupEvent>().Publish("LoginDialog"));ShowSettingsCommand = new DelegateCommand(() =>_eventAggregator.GetEvent<ShowPopupEvent>().Publish("SettingsDialog"));}
}