--概述

這個項目演示了如何在WPF中使用各種Prism功能的示例。如果您剛剛開始使用Prism，建議您從第一個示例開始，按順序從列表中開始。每個示例都基于前一個示例的概念。

此項目平臺框架：.NET Core 3.1

Prism版本：8.0.0.1909

提示：這些項目都在同一解決方法下，需要依次打開運行，可以選中項目-》右鍵-》設(shè)置啟動項目，然后運行：

目錄介紹

Topic	描述
Bootstrapper and the Shell	創(chuàng)建一個基本的引導(dǎo)程序和shell
Regions	創(chuàng)建一個區(qū)域
Custom Region Adapter	為StackPanel創(chuàng)建自定義區(qū)域適配器
View Discovery	使用視圖發(fā)現(xiàn)自動注入視圖
View Injection	使用視圖注入手動添加和刪除視圖
View Activation/Deactivation	手動激活和停用視圖
Modules with App.config	使用應(yīng)用加載模塊。配置文件
Modules with Code	使用代碼加載模塊
Modules with Directory	從目錄加載模塊
Modules loaded manually	使用IModuleManager手動加載模塊
ViewModelLocator	使用ViewModelLocator
ViewModelLocator - Change Convention	更改ViewModelLocator命名約定
ViewModelLocator - Custom Registrations	為特定視圖手動注冊ViewModels
DelegateCommand	使用DelegateCommand和DelegateCommand<T>
CompositeCommands	了解如何使用CompositeCommands作為單個命令調(diào)用多個命令
IActiveAware Commands	使您的命令I(lǐng)ActiveAware僅調(diào)用激活的命令
Event Aggregator	使用IEventAggregator
Event Aggregator - Filter Events	訂閱事件時篩選事件
RegionContext	使用RegionContext將數(shù)據(jù)傳遞到嵌套區(qū)域
Region Navigation	請參見如何實現(xiàn)基本區(qū)域?qū)Ш?/td>
Navigation Callback	導(dǎo)航完成后獲取通知
Navigation Participation	通過INavigationAware了解視圖和視圖模型導(dǎo)航參與
Navigate to existing Views	導(dǎo)航期間控制視圖實例
Passing Parameters	將參數(shù)從視圖/視圖模型傳遞到另一個視圖/視圖模型
Confirm/cancel Navigation	使用IConfirmNavigationReqest界面確認或取消導(dǎo)航
Controlling View lifetime	使用IRegionMemberLifetime自動從內(nèi)存中刪除視圖
Navigation Journal	了解如何使用導(dǎo)航日志

部分項目演示和介紹

① BootstrapperShell啟動界面：

這個主要演示Prism框架搭建的用法：

step1：在nuget上引用Prsim.Unity

step2：修改App.xaml：設(shè)置引導(dǎo)程序

<Application x:Class="BootstrapperShell.App"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="clr-namespace:BootstrapperShell"><Application.Resources></Application.Resources> </Application>public partial class App : Application{protected override void OnStartup(StartupEventArgs e){base.OnStartup(e);var bootstrapper = new Bootstrapper();bootstrapper.Run();}}

step3：在引導(dǎo)程序中設(shè)置啟動項目：

using Unity; using Prism.Unity; using BootstrapperShell.Views; using System.Windows; using Prism.Ioc;namespace BootstrapperShell {class Bootstrapper : PrismBootstrapper{protected override DependencyObject CreateShell(){return Container.Resolve<MainWindow>();}protected override void RegisterTypes(IContainerRegistry containerRegistry){}} }

step4：在MainWindow.xaml中顯示個字符串

<Window x:Class="BootstrapperShell.Views.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="Shell" Height="350" Width="525"><Grid><ContentControl Content="Hello from Prism" /></Grid> </Window>

②ViewInjection：視圖注冊

MainWindow.xaml：通過ContentControl 關(guān)聯(lián)視圖

<Window x:Class="ViewInjection.Views.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:prism="http://prismlibrary.com/"Title="Shell" Height="350" Width="525"><DockPanel LastChildFill="True"><Button DockPanel.Dock="Top" Click="Button_Click">Add View</Button><ContentControl prism:RegionManager.RegionName="ContentRegion" /></DockPanel> </Window>

MainWindow.xaml.cs：鼠標點擊后通過IRegion 接口注冊視圖

public partial class MainWindow : Window{IContainerExtension _container;IRegionManager _regionManager;public MainWindow(IContainerExtension container, IRegionManager regionManager){InitializeComponent();_container = container;_regionManager = regionManager;}private void Button_Click(object sender, RoutedEventArgs e){var view = _container.Resolve<ViewA>();IRegion region = _regionManager.Regions["ContentRegion"];region.Add(view);}}

③ActivationDeactivation：視圖激活和注銷

MainWindow.xaml.cs：這里在窗體構(gòu)造函數(shù)中注入了一個容器擴展接口和一個regin管理器接口，分別用來裝載視圖和注冊regin，窗體的激活和去激活分別通過regions的Activate和Deactivate方法實現(xiàn)

public partial class MainWindow : Window{IContainerExtension _container;IRegionManager _regionManager;IRegion _region;ViewA _viewA;ViewB _viewB;public MainWindow(IContainerExtension container, IRegionManager regionManager){InitializeComponent();_container = container;_regionManager = regionManager;this.Loaded += MainWindow_Loaded;}private void MainWindow_Loaded(object sender, RoutedEventArgs e){_viewA = _container.Resolve<ViewA>();_viewB = _container.Resolve<ViewB>();_region = _regionManager.Regions["ContentRegion"];_region.Add(_viewA);_region.Add(_viewB);}private void Button_Click(object sender, RoutedEventArgs e){//activate view a_region.Activate(_viewA);}private void Button_Click_1(object sender, RoutedEventArgs e){//deactivate view a_region.Deactivate(_viewA);}private void Button_Click_2(object sender, RoutedEventArgs e){//activate view b_region.Activate(_viewB);}private void Button_Click_3(object sender, RoutedEventArgs e){//deactivate view b_region.Deactivate(_viewB);}}

④UsingEventAggregator：事件發(fā)布訂閱

事件類定義：

public class MessageSentEvent : PubSubEvent<string>{}

注冊兩個組件：ModuleA和ModuleB

protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog){moduleCatalog.AddModule<ModuleA.ModuleAModule>();moduleCatalog.AddModule<ModuleB.ModuleBModule>();}

ModuleAModule 中注冊視圖MessageView

public class ModuleAModule : IModule{public void OnInitialized(IContainerProvider containerProvider){var regionManager = containerProvider.Resolve<IRegionManager>();regionManager.RegisterViewWithRegion("LeftRegion", typeof(MessageView));}public void RegisterTypes(IContainerRegistry containerRegistry){}}

MessageView.xaml：視圖中給button俺妞妞綁定命令

<UserControl x:Class="ModuleA.Views.MessageView"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:prism="http://prismlibrary.com/" prism:ViewModelLocator.AutoWireViewModel="True" Padding="25"><StackPanel><TextBox Text="{Binding Message}" Margin="5"/><Button Command="{Binding SendMessageCommand}" Content="Send Message" Margin="5"/></StackPanel> </UserControl>

MessageViewModel.cs：在vm中把界面綁定的命令委托給SendMessage，然后在方法SendMessage中發(fā)布消息：

using Prism.Commands; using Prism.Events; using Prism.Mvvm; using UsingEventAggregator.Core;namespace ModuleA.ViewModels {public class MessageViewModel : BindableBase{IEventAggregator _ea;private string _message = "Message to Send";public string Message{get { return _message; }set { SetProperty(ref _message, value); }}public DelegateCommand SendMessageCommand { get; private set; }public MessageViewModel(IEventAggregator ea){_ea = ea;SendMessageCommand = new DelegateCommand(SendMessage);}private void SendMessage(){_ea.GetEvent<MessageSentEvent>().Publish(Message);}} }

在MessageListViewModel 中接收并顯示接收到的消息：

public class MessageListViewModel : BindableBase{IEventAggregator _ea;private ObservableCollection<string> _messages;public ObservableCollection<string> Messages{get { return _messages; }set { SetProperty(ref _messages, value); }}public MessageListViewModel(IEventAggregator ea){_ea = ea;Messages = new ObservableCollection<string>();_ea.GetEvent<MessageSentEvent>().Subscribe(MessageReceived);}private void MessageReceived(string message){Messages.Add(message);}}

以上就是這個開源項目比較經(jīng)典的幾個入門實例，其它就不展開講解了，有興趣的可以下載源碼自己閱讀學習。

源碼下載

github訪問速度較慢，所以我下載了一份放到的百度網(wǎng)盤

百度網(wǎng)盤鏈接：https://pan.baidu.com/s/10Gyks2w-R4B_3z9Jj5mRcA?

提取碼：0000

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開源項目鏈接：https://github.com/PrismLibrary/Prism-Samples-Wpf

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