回答編集履歴
2
書き直し
test
CHANGED
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@@ -23,9 +23,18 @@
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---
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-
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-
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-
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`MainViewModel`を`RegisterSingleton`すれば上記で十分です。
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シングルトンにしたくない場合は、`TimerTrigger`に変更したら取れました（ぶっちゃけクソっぽいが^^;
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```xml
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<i:TimerTrigger EventName="Loaded" MillisecondsPerTick="100" TotalTicks="1">
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<i:InvokeCommandAction Command="{Binding LoadedCommand}" CommandParameter="{Binding DataContext, ElementName=MainView}" />
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</i:TimerTrigger>
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```
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100の根拠はありません（手元では1でも0でも!! 取れました）
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[TimerTrigger クラス (Microsoft.Expression.Interactivity.Core) | Microsoft Learn](https://learn.microsoft.com/ja-jp/previous-versions/visualstudio/design-tools/expression-studio-4/ff726469(v=expression.40))
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```xml:MainWindow.xaml
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<Window
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@@ -33,21 +42,20 @@
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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:prism="http://prismlibrary.com/"
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Title="{Binding Title}"
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Width="525"
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Height="350"
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prism:ViewModelLocator.AutoWireViewModel="True">
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<DockPanel>
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<StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
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<Button Command="{Binding NavigateCommand}" CommandParameter="ViewA">Navigate ViewA</Button>
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<Button Command="{Binding NavigateCommand}" CommandParameter="Main
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<Button Command="{Binding NavigateCommand}" CommandParameter="Main">Navigate Main</Button>
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<Button Command="{Binding ShowDialogCommand}">Show Main
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<Button Command="{Binding ShowDialogCommand}">Show MainDialog</Button>
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</StackPanel>
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<ContentControl prism:RegionManager.RegionName="ContentRegion" />
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</DockPanel>
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</Window>
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```
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```cs:MainWindow
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```cs:MainWindowViewModel.cs
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using Prism.Mvvm;
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using Prism.Regions;
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using Prism.Services.Dialogs;
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@@ -58,39 +66,31 @@
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public class MainWindowViewModel : BindableBase
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{
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private string _title = "Prism Application";
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public string Title { get => _title; set => SetProperty(ref _title, value); }
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-
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public ReactiveCommand<string> NavigateCommand { get; }
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public ReactiveCommand ShowDialogCommand { get; }
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private IRegionManager _regionManager;
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private IDialogService _dialogService;
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public MainWindowViewModel(IRegionManager regionManager, IDialogService dialogService)
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{
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_regionManager = regionManager;
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_dialogService = dialogService;
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NavigateCommand = new ReactiveCommand<string>()
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.WithSubscribe(x =>
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.WithSubscribe(x => regionManager.RequestNavigate("ContentRegion", x));
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ShowDialogCommand = new ReactiveCommand()
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.WithSubscribe(() =>
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.WithSubscribe(() => dialogService.ShowDialog(nameof(Main)));
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}
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}
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}
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}
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```
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```
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-
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```xml:Main
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```xml:Main.xaml
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<UserControl
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x:Class="Q07l0vpm2ryc05t.Views.Main
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x:Class="Q07l0vpm2ryc05t.Views.Main"
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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:TestArea="clr-namespace:Q07l0vpm2ryc05t.Views"
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xmlns:prism="http://prismlibrary.com/"
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x:Name="MainView"
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prism:ViewModelLocator.AutoWireViewModel="True">
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<StackPanel>
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<TextBlock Text="Main
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<TextBlock Text="Main" />
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<TextBlock Text="{Binding HashCode}" />
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<GroupBox Margin="5">
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<TestArea:ChildArea />
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@@ -98,7 +98,7 @@
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</StackPanel>
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</UserControl>
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```
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```cs:MainView
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```cs:MainViewModel.cs
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using System;
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using Prism.Mvvm;
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using Prism.Services.Dialogs;
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@@ -108,8 +108,8 @@
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public class MainViewModel : BindableBase, IDialogAware
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{
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public string HashCode => $"MainViewModel.HashCode:{GetHashCode()}";
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public string Title => "Main
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public string Title => "MainDialog";
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public event Action<IDialogResult> RequestClose;
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public MainViewModel() { }
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x:Class="Q07l0vpm2ryc05t.Views.ChildArea"
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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:i="http://schemas.microsoft.com/xaml/behaviors"
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xmlns:prism="http://prismlibrary.com/"
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x:Name="ChildAreaView"
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prism:ViewModelLocator.AutoWireViewModel="True">
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<i:Interaction.Triggers>
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<!--<i:EventTrigger EventName="Loaded">
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<i:InvokeCommandAction Command="{Binding LoadedCommand}" CommandParameter="{Binding DataContext, ElementName=MainView}" />
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</i:EventTrigger>-->
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<i:TimerTrigger
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EventName="Loaded"
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MillisecondsPerTick="0"
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TotalTicks="1">
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<i:InvokeCommandAction Command="{Binding LoadedCommand}" CommandParameter="{Binding DataContext, ElementName=MainView}" />
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</i:TimerTrigger>
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</i:Interaction.Triggers>
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<StackPanel>
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<TextBlock Text="ChildArea" />
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<TextBlock Text="{Binding HashCode}" />
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</StackPanel>
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</UserControl>
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```
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```cs:ChildArea
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```cs:ChildAreaViewModel.cs
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using Prism.Mvvm;
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using Reactive.Bindings;
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namespace Q07l0vpm2ryc05t.ViewModels;
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public class ChildAreaViewModel : BindableBase
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{
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public string HashCode => $"
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public string HashCode => $"MainViewModel.HashCode:{_mainViewModel?.GetHashCode()}";
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public ReactiveCommand<object> LoadedCommand { get; }
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private MainViewModel _mainViewModel;
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public ChildAreaViewModel(MainViewModel mainViewModel)
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public ChildAreaViewModel(MainViewModel mainViewModel)
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{
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// RegisterSingletonでいいならこれだけ
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//_mainViewModel = mainViewModel;
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LoadedCommand = new ReactiveCommand<object>().WithSubscribe(Loaded);
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}
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private void Loaded(object mainViewModel)
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{
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_mainViewModel = mainViewModel as MainViewModel;
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RaisePropertyChanged(nameof(HashCode));
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}
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}
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```
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@@ -161,13 +193,13 @@
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protected override void RegisterTypes(IContainerRegistry containerRegistry)
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{
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containerRegistry.RegisterSingleton<MainViewModel>();
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//containerRegistry.RegisterSingleton<MainViewModel>();
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containerRegistry.RegisterForNavigation<ViewA>();
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containerRegistry.RegisterForNavigation<Main
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containerRegistry.RegisterForNavigation<Main>();
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containerRegistry.RegisterDialog<Main
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containerRegistry.RegisterDialog<Main>();
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}
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}
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}
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}
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```
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```
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1
追記
test
CHANGED
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@@ -20,3 +20,154 @@
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> そうすると、ChildViewModelのLoadedコマンドが呼ばれなくなりました…。
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`DataContext`はひとつしか持てないので、`AutoWireViewModel`しているViewに違う`DataContext`を設定したら当然動かなくなりますよね。
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---
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> MainViewModelをシングルトン設定にしてもうまくいきませんでした・・・。
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こちらの手元では`RegisterSingleton`すれば同一インスタンスになりましたが、何か前提が違いますか？
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```xml:MainWindow.xaml
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<Window
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x:Class="Q07l0vpm2ryc05t.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:prism="http://prismlibrary.com/"
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Title="{Binding Title}"
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Width="525"
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Height="350"
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prism:ViewModelLocator.AutoWireViewModel="True">
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<DockPanel>
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<StackPanel DockPanel.Dock="Top" Orientation="Horizontal">
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<Button Command="{Binding NavigateCommand}" CommandParameter="ViewA">Navigate ViewA</Button>
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<Button Command="{Binding NavigateCommand}" CommandParameter="MainView">Navigate MainView</Button>
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<Button Command="{Binding ShowDialogCommand}">Show MainView Dialog</Button>
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</StackPanel>
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<ContentControl prism:RegionManager.RegionName="ContentRegion" />
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</DockPanel>
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</Window>
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```
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```cs:MainWindow.xaml.cs
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using Prism.Mvvm;
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using Prism.Regions;
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53
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using Prism.Services.Dialogs;
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using Q07l0vpm2ryc05t.Views;
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55
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using Reactive.Bindings;
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namespace Q07l0vpm2ryc05t.ViewModels;
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public class MainWindowViewModel : BindableBase
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{
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private string _title = "Prism Application";
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public string Title { get => _title; set => SetProperty(ref _title, value); }
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public ReactiveCommand<string> NavigateCommand { get; }
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public ReactiveCommand ShowDialogCommand { get; }
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private IRegionManager _regionManager;
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private IDialogService _dialogService;
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public MainWindowViewModel(IRegionManager regionManager, IDialogService dialogService)
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{
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_regionManager = regionManager;
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_dialogService = dialogService;
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NavigateCommand = new ReactiveCommand<string>()
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.WithSubscribe(x => _regionManager.RequestNavigate("ContentRegion", x));
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ShowDialogCommand = new ReactiveCommand()
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.WithSubscribe(() => _dialogService.ShowDialog(nameof(MainView)));
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}
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}
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```
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```xml:MainView.xaml
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<UserControl
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x:Class="Q07l0vpm2ryc05t.Views.MainView"
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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:TestArea="clr-namespace:Q07l0vpm2ryc05t.Views"
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xmlns:prism="http://prismlibrary.com/"
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prism:ViewModelLocator.AutoWireViewModel="True">
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<StackPanel>
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<TextBlock Text="MainView" />
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<TextBlock Text="{Binding HashCode}" />
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95
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<GroupBox Margin="5">
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96
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<TestArea:ChildArea />
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97
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</GroupBox>
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</StackPanel>
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</UserControl>
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```
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```cs:MainView.xaml.cs
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using System;
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using Prism.Mvvm;
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104
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using Prism.Services.Dialogs;
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105
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+
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106
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namespace Q07l0vpm2ryc05t.ViewModels;
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108
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public class MainViewModel : BindableBase, IDialogAware
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{
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public string HashCode => $"MainViewModel.HashCode:{GetHashCode()}";
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public string Title => "MainView";
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public event Action<IDialogResult> RequestClose;
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public MainViewModel() { }
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public bool CanCloseDialog() => true;
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public void OnDialogClosed() { }
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public void OnDialogOpened(IDialogParameters parameters) { }
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}
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```
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```xml:ChildArea.xaml
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<UserControl
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x:Class="Q07l0vpm2ryc05t.Views.ChildArea"
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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:prism="http://prismlibrary.com/"
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prism:ViewModelLocator.AutoWireViewModel="True">
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<StackPanel>
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<TextBlock Text="ChildArea" />
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<TextBlock Text="{Binding HashCode}" />
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</StackPanel>
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</UserControl>
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```
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```cs:ChildArea.xaml.cs
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using Prism.Mvvm;
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namespace Q07l0vpm2ryc05t.ViewModels;
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141
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public class ChildAreaViewModel : BindableBase
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142
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{
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143
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public string HashCode => $"Inject MainViewModel.HashCode:{_mainViewModel.GetHashCode()}";
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144
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+
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145
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private MainViewModel _mainViewModel;
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public ChildAreaViewModel(MainViewModel mainViewModel) => _mainViewModel = mainViewModel;
|
|
147
|
+
}
|
|
148
|
+
```
|
|
149
|
+
|
|
150
|
+
```cs:App.xaml.cs
|
|
151
|
+
using System.Windows;
|
|
152
|
+
using Prism.Ioc;
|
|
153
|
+
using Q07l0vpm2ryc05t.ViewModels;
|
|
154
|
+
using Q07l0vpm2ryc05t.Views;
|
|
155
|
+
|
|
156
|
+
namespace Q07l0vpm2ryc05t;
|
|
157
|
+
|
|
158
|
+
public partial class App
|
|
159
|
+
{
|
|
160
|
+
protected override Window CreateShell() => Container.Resolve<MainWindow>();
|
|
161
|
+
|
|
162
|
+
protected override void RegisterTypes(IContainerRegistry containerRegistry)
|
|
163
|
+
{
|
|
164
|
+
containerRegistry.RegisterSingleton<MainViewModel>();
|
|
165
|
+
|
|
166
|
+
containerRegistry.RegisterForNavigation<ViewA>();
|
|
167
|
+
containerRegistry.RegisterForNavigation<MainView>();
|
|
168
|
+
|
|
169
|
+
containerRegistry.RegisterDialog<MainView>();
|
|
170
|
+
}
|
|
171
|
+
}
|
|
172
|
+
```
|
|
173
|
+
|