wpf prism ViewInjection (view injection) ViewActivate (view activation) and ViewDeactive (deactivation)

1 Create a new wpf application and reference prism.unity (v8.0)

2 Modify App.xaml

<prism:PrismApplication x:Class="ViewInjection.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:ViewInjection"
             xmlns:prism="http://prismlibrary.com/"
             >
    <Application.Resources>
         
    </Application.Resources>
</prism:PrismApplication>

3 Modify App.xaml.cs

using Prism.Ioc;
using Prism.Unity;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;

namespace ViewInjection
{
    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : PrismApplication
    {
        protected override Window CreateShell()
        {
            return Container.Resolve<MainWindow>();
        }

        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            
        }
    }
}

4 Build the Views directory and add two user controls ViewA and ViewB

<UserControl x:Class="ViewInjection.Views.ViewA"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:ViewInjection.Views"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <TextBlock Text="ViewA" FontSize="36"/>
    </Grid>
</UserControl>

<UserControl x:Class="ViewInjection.Views.ViewB"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:ViewInjection.Views"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <TextBlock Text="ViewB" FontSize="36"/>
    </Grid>
</UserControl>

5 Modify MainWindow.xaml

<Window x:Class="ViewInjection.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ViewInjection"
        xmlns:prism="http://prismlibrary.com/"
        mc:Ignorable="d"
        Title="Shell" Height="450" Width="800">
    <DockPanel LastChildFill="True">
        <StackPanel DockPanel.Dock="Left">
            <Button x:Name="btnActive1"  Click="btnActive1_Click" Content="Active View1"/>
            <Button x:Name="btnDeactive1"  Click="btnDeactive1_Click" Content="Deactive View1"/>
            <Button x:Name="btnActive2"  Click="btnActive2_Click" Content="Active View2"/>
            <Button x:Name="btnDeactive2"  Click="btnDeactive2_Click" Content="Deactive View2"/>

        </StackPanel>
        <ContentControl prism:RegionManager.RegionName="ContentRegion" HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </DockPanel>
</Window>

6 Modify MainWindow.xaml.cs

using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Unity;
using ViewInjection.Views;

namespace ViewInjection
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        IUnityContainer _container;
        IRegionManager _manager;
        IRegion _region;
        ViewA _viewA;
        ViewB _viewB;
        public MainWindow(IUnityContainer container,IRegionManager manager)
        {
            InitializeComponent();
            this._container = container;
            this._manager = manager;
            this.Loaded += MainWindow_Loaded;
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            _viewA = _container.Resolve<ViewA>();
            _viewB = _container.Resolve<ViewB>();

            _region = _manager.Regions["ContentRegion"];
            _region.Add(_viewA);
            _region.Add(_viewB);
        }

        private void btnActive1_Click(object sender, RoutedEventArgs e)
        {
            _region.Activate(_viewA);
        }

        private void btnDeactive1_Click(object sender, RoutedEventArgs e)
        {
            _region.Deactivate(_viewA);
        }

        private void btnActive2_Click(object sender, RoutedEventArgs e)
        {
            _region.Activate(_viewB);
        }

        private void btnDeactive2_Click(object sender, RoutedEventArgs e)
        {
            _region.Deactivate(_viewB);
        }
    }
}