--概述
這個專案演示瞭如何在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。每個示例都基於前一個示例的概念。
此專案平臺框架：.NET Core 3.1
Prism版本：8.0.0.1909
提示：這些專案都在同一解決方法下，需要依次開啟執行，可以選中專案-》右鍵-》設定啟動專案，然後執行：
目錄介紹
| Topic | 描述 |
| Bootstrapper and the Shell | 建立一個基本的載入程式和shell |
| Regions | 建立一個區域 |
| Custom Region Adapter | 為StackPanel建立自定義區域介面卡 |
| View Discovery | 使用檢視發現自動注入檢視 |
| View Injection | 使用檢視注入手動新增和刪除檢視 |
| View Activation/Deactivation | 手動啟用和停用檢視 |
| Modules with App.config | 使用應用載入模組。配置檔案 |
| Modules with Code | 使用程式碼載入模組 |
| Modules with Directory | 從目錄載入模組 |
| Modules loaded manually | 使用IModuleManager手動載入模組 |
| ViewModelLocator | 使用ViewModelLocator |
| ViewModelLocator - Change Convention | 更改ViewModelLocator命名約定 |
| ViewModelLocator - Custom Registrations | 為特定檢視手動註冊ViewModels |
| DelegateCommand | 使用DelegateCommand和DelegateCommand<T> |
| CompositeCommands | 瞭解如何使用CompositeCommands作為單個命令呼叫多個命令 |
| IActiveAware Commands | 使您的命令IActiveAware僅呼叫啟用的命令 |
| Event Aggregator | 使用IEventAggregator |
| Event Aggregator - Filter Events | 訂閱事件時篩選事件 |
| RegionContext | 使用RegionContext將資料傳遞到巢狀區域 |
| Region Navigation | 請參見如何實現基本區域導航 |
| Navigation Callback | 導航完成後獲取通知 |
| Navigation Participation | 通過INavigationAware瞭解檢視和檢視模型導航參與 |
| Navigate to existing Views | 導航期間控制檢視例項 |
| Passing Parameters | 將引數從檢視/檢視模型傳遞到另一個檢視/檢視模型 |
| Confirm/cancel Navigation | 使用IConfirmNavigationReqest介面確認或取消導航 |
| Controlling View lifetime | 使用IRegionMemberLifetime自動從記憶體中刪除檢視 |
| Navigation Journal | 瞭解如何使用導航日誌 |
部分專案演示和介紹
① BootstrapperShell啟動介面：
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：設定載入程式
<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：在載入程式中設定啟動專案：
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：檢視註冊
MainWindow.xaml：通過ContentControl 關聯檢視
<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：滑鼠點選後通過IRegion 介面註冊檢視
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：檢視啟用和登出
MainWindow.xaml.cs：這裡在窗體建構函式中注入了一個容器擴充套件介面和一個regin管理器介面，分別用來裝載檢視和註冊regin，窗體的啟用和去啟用分別通過regions的Activate和Deactivate方法實現
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：事件釋出訂閱
事件類定義：
public class MessageSentEvent : PubSubEvent<string>
{
}
註冊兩個元件：ModuleA和ModuleB
protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog)
{
moduleCatalog.AddModule<ModuleA.ModuleAModule>();
moduleCatalog.AddModule<ModuleB.ModuleBModule>();
}
ModuleAModule 中註冊檢視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：檢視中給button俺妞妞繫結命令
<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中把介面繫結的命令委託給SendMessage，然後在方法SendMessage中釋出訊息：
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 中接收並顯示接收到的訊息：
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);
}
}
以上就是這個開源專案比較經典的幾個入門例項，其它就不展開講解了，有興趣的可以下載原始碼自己閱讀學習。
原始碼下載
github訪問速度較慢，所以我下載了一份放到的百度網盤
百度網盤連結：https://pan.baidu.com/s/10Gyks2w-R4B_3z9Jj5mRcA
提取碼：0000
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開源專案連結：https://github.com/PrismLibrary/Prism-Samples-Wpf
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