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Prism框架实战：WPF企业级开发全解

news 2025/6/28 11:30:21

以下是一个完整的WPF项目示例，使用Prism框架实现依赖注入、导航、复合命令、模块化和聚合事件功能。项目结构清晰，包含核心功能实现：

项目结构

PrismDemoApp/
├── PrismDemoApp (主项目)
│   ├── Views/
│   │   ├── ShellView.xaml
│   │   ├── MainView.xaml
│   │   └── SettingsView.xaml
│   ├── ViewModels/
│   │   ├── ShellViewModel.cs
│   │   ├── MainViewModel.cs
│   │   └── SettingsViewModel.cs
│   ├── App.xaml
│   └── Bootstrapper.cs
├── ModuleA (模块项目)
│   ├── Views/
│   │   └── ModuleAView.xaml
│   ├── ViewModels/
│   │   └── ModuleAViewModel.cs
│   └── ModuleAModule.cs
└── Events/└── MessageSentEvent.cs

1. 依赖注入配置 (Bootstrapper.cs)

public class Bootstrapper : PrismBootstrapper
{protected override DependencyObject CreateShell(){return Container.Resolve<ShellView>();}protected override void RegisterTypes(IContainerRegistry containerRegistry){// 注册视图导航containerRegistry.RegisterForNavigation<MainView>();containerRegistry.RegisterForNavigation<SettingsView>();// 注册服务containerRegistry.Register<IDataService, DataService>();// 注册复合命令containerRegistry.RegisterSingleton<IApplicationCommands, ApplicationCommands>();}protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog){// 动态加载模块moduleCatalog.AddModule<ModuleAModule>();}
}

2. 复合命令实现 (ApplicationCommands.cs)

public interface IApplicationCommands
{CompositeCommand SaveAllCommand { get; }
}public class ApplicationCommands : IApplicationCommands
{public CompositeCommand SaveAllCommand { get; } = new CompositeCommand();
}

3. 主视图模型 (MainViewModel.cs)

public class MainViewModel : BindableBase
{private readonly IRegionManager _regionManager;private readonly IEventAggregator _eventAggregator;private readonly IApplicationCommands _commands;public DelegateCommand NavigateCommand { get; }public DelegateCommand SaveCommand { get; }public DelegateCommand SendEventCommand { get; }public MainViewModel(IRegionManager regionManager,IEventAggregator eventAggregator,IApplicationCommands commands){_regionManager = regionManager;_eventAggregator = eventAggregator;_commands = commands;NavigateCommand = new DelegateCommand(NavigateToSettings);SaveCommand = new DelegateCommand(Save);SendEventCommand = new DelegateCommand(SendEvent);// 注册到复合命令commands.SaveAllCommand.RegisterCommand(SaveCommand);}private void NavigateToSettings(){_regionManager.RequestNavigate("ContentRegion", "SettingsView");}private void Save(){// 保存逻辑}private void SendEvent(){_eventAggregator.GetEvent<MessageSentEvent>().Publish("Hello from Main!");}
}

4. 模块实现 (ModuleAModule.cs)

public class ModuleAModule : IModule
{private readonly IRegionManager _regionManager;private readonly IApplicationCommands _commands;public ModuleAModule(IRegionManager regionManager, IApplicationCommands commands){_regionManager = regionManager;_commands = commands;}public void OnInitialized(IContainerProvider containerProvider){_regionManager.RegisterViewWithRegion("ModuleRegion", typeof(ModuleAView));}public void RegisterTypes(IContainerRegistry containerRegistry){containerRegistry.RegisterForNavigation<ModuleAView>();// 订阅事件var ea = containerProvider.Resolve<IEventAggregator>();ea.GetEvent<MessageSentEvent>().Subscribe(HandleMessage);}private void HandleMessage(string message){// 处理接收到的消息}
}

5. 聚合事件 (MessageSentEvent.cs)

public class MessageSentEvent : PubSubEvent<string> { }

6. Shell视图导航 (ShellView.xaml)

<Window xmlns:prism="http://prismlibrary.com/"><DockPanel><Menu><MenuItem Header="导航"><MenuItem Command="{Binding NavigateCommand}" Header="主视图" /><MenuItem prism:CommandBehavior.Command="{Binding ApplicationCommands.SaveAllCommand}" Header="保存所有" /></MenuItem></Menu><ContentControl prism:RegionManager.RegionName="ContentRegion" /><ContentControl prism:RegionManager.RegionName="ModuleRegion" /></DockPanel>
</Window>

7. 模块视图 (ModuleAView.xaml)

<UserControl><StackPanel><Button Command="{Binding SendEventCommand}" Content="发送事件" /><TextBlock Text="{Binding ReceivedMessage}" /></StackPanel>
</UserControl>