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> 個人的にはAutoWireしなければ親のDataContextを引き継ぎますから、どうにでもコントロールできていいと思うのですが(Prism的にはいまいちなんですかね)
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> あとd:DataContextにデザイン用VMなりVMでデザイン時を判断しデータを入れるようにしておくと気が利くなって思います。
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回答の私のコメントを回収しておきます。
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VMの条件によっては`AutoWire`してもいいと思います。
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`SetDefaultViewTypeToViewModelTypeResolver`が面倒だったら、本体の`ViewAViewModel`をカラ継承しておいておくとか?^^;
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本体はプラグインのことを知らないが、プラグインは本体のことを知っていていいんですよね?
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本体側
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```x
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```xml
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<Window
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x:Class="BlankCoreApp1.Views.MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:ViewModels="clr-namespace:BlankCoreApp1.ViewModels"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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xmlns:prism="http://prismlibrary.com/"
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Width="525"
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Height="350"
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d:DataContext="{d:DesignInstance {x:Type ViewModels:MainWindowViewModel}}"
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prism:ViewModelLocator.AutoWireViewModel="True"
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mc:Ignorable="d">
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<Grid>
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<GroupBox Header="ViewA">
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<ContentControl prism:RegionManager.RegionName="ContentRegion" DataContext="{Binding ViewAViewModel}" />
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</GroupBox>
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</Grid>
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</Window>
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```
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```x
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```xml
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<UserControl
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x:Class="BlankCoreApp1.Views.DefaultViewA"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:ViewModels="clr-namespace:BlankCoreApp1.ViewModels"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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d:DataContext="{d:DesignInstance {x:Type ViewModels:ViewAViewModel}, IsDesignTimeCreatable=True}"
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mc:Ignorable="d">
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<DockPanel>
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<TextBlock DockPanel.Dock="Top" Text="BlankCoreApp1.Views.DefaultViewA" />
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<TextBlock Text="{Binding Message}" />
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</DockPanel>
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</UserControl>
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```
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```
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```cs
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using BlankCoreApp1.Views;
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using Prism.Mvvm;
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using Prism.Regions;
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namespace BlankCoreApp1.ViewModels
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{
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public class MainWindowViewModel : BindableBase
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{
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// 本題でないので直接newするが好きにDIしてください
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public ViewAViewModel ViewAViewModel { get; } = new ViewAViewModel();
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public MainWindowViewModel() { }
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public MainWindowViewModel(IRegionManager regionManager)
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{
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// CustomViewがなければデフォルトを表示
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regionManager.RegisterViewWithRegion("ContentRegion", typeof(DefaultViewA));
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}
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}
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public class ViewAViewModel : BindableBase
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{
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private string _message;
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public string Message { get => _message; set => SetProperty(ref _message, value); }
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public
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public ViewAViewModel() => Message = $"{GetType().FullName}";
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}
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}
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```
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```cs
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using BlankCoreApp1.Views;
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using Prism.Ioc;
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using Prism.Modularity;
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using System.Windows;
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namespace BlankCoreApp1
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{
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public partial class App
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{
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protected override Window CreateShell() => Container.Resolve<MainWindow>();
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protected override IModuleCatalog CreateModuleCatalog()
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{
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//
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// 指定フォルダからモジュール読み込み
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return new DirectoryModuleCatalog() { ModulePath = @".\Modules" };
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}
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protected override void RegisterTypes(IContainerRegistry containerRegistry) { }
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}
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public class ViewAViewModel : BindableBase
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{
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private string _message;
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public string Message { get => _message; set => SetProperty(ref _message, value); }
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public ViewAViewModel() => Message = $"{GetType().FullName}";
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}
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}
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```
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```C#
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using BlankCoreApp1.Views;
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using Prism.Ioc;
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using Prism.Modularity;
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using System.Windows;
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namespace BlankCoreApp1
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{
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public partial class App
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{
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protected override Window CreateShell() => Container.Resolve<MainWindow>();
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protected override IModuleCatalog CreateModuleCatalog()
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{
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// 指定フォルダからモジュール読み込み
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return new DirectoryModuleCatalog() { ModulePath = @".\Modules" };
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}
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protected override void RegisterTypes(IContainerRegistry containerRegistry) { }
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}
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}
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```
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---
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プラグイン側
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```x
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```xml
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<UserControl
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x:Class="CustomViewAModule.Views.ViewA"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:ViewModels="clr-namespace:BlankCoreApp1.ViewModels;assembly=BlankCoreApp1"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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d:DataContext="{d:DesignInstance {x:Type ViewModels:ViewAViewModel}, IsDesignTimeCreatable=True}"
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mc:Ignorable="d">
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<DockPanel>
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<TextBlock DockPanel.Dock="Top" Text="CustomViewAModule.Views.ViewA" />
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<TextBlock Text="{Binding Message}" />
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</DockPanel>
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</UserControl>
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```
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```
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```cs
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using CustomViewAModule.Views;
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using Prism.Ioc;
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using Prism.Modularity;
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using Prism.Regions;
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namespace CustomViewAModule
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{
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public class CustomViewAModuleModule : IModule
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{
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public void OnInitialized(IContainerProvider containerProvider)
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{
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var regionManager = containerProvider.Resolve<IRegionManager>();
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// CustomViewで上書きナビゲート
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regionManager.RequestNavigate("ContentRegion", "ViewA");
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// こちらが後に呼ばれているのにうまく出なかった
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//regionManager.RegisterViewWithRegion("ContentRegion", typeof(ViewA));
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}
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public void RegisterTypes(IContainerRegistry containerRegistry)
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=> containerRegistry.RegisterForNavigation<ViewA>();
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}
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}
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```
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![アプリ画像](c0fd8a2818a07b8e5271510011e458de.png)
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