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ViewModelLocator to create ViewModel from DI container and initialize DataContext of View #75

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e7f108a
ViewModelLocator
denis-tsv Mar 12, 2022
d3c2877
format
denis-tsv Mar 12, 2022
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27 changes: 23 additions & 4 deletions samples/MvvmSampleUwp/App.xaml.cs
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Expand Up @@ -2,6 +2,7 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System.Linq;
using Windows.ApplicationModel.Activation;
using Windows.ApplicationModel.Core;
using Windows.UI.Xaml;
Expand Down Expand Up @@ -41,9 +42,7 @@ protected override void OnLaunched(LaunchActivatedEventArgs e)
TitleBarHelper.StyleTitleBar();
TitleBarHelper.ExpandViewIntoTitleBar();

// Register services
Ioc.Default.ConfigureServices(
new ServiceCollection()
var serviceProvider = new ServiceCollection()
//Services
.AddSingleton<IDialogService, DialogService>()
.AddSingleton<IFilesService, FilesService>()
Expand All @@ -60,7 +59,27 @@ protected override void OnLaunched(LaunchActivatedEventArgs e)
.AddTransient<ValidationFormWidgetViewModel>()
.AddTransient<RelayCommandPageViewModel>()
.AddTransient<SamplePageViewModel>()
.BuildServiceProvider());
.BuildServiceProvider();

// Register services
Ioc.Default.ConfigureServices(serviceProvider);

ViewModelLocator.SetViewModelFactory(view =>
{
var viewName = view.GetType().Name;
var viewModelName = $"{viewName}ViewModel";
var viewModelType = typeof(SamplePageViewModel).Assembly.GetTypes().FirstOrDefault(x => x.Name == viewModelName);

if (viewModelType == null)
{
if (viewModelName.Contains("Messenger"))
viewModelType = typeof(MessengerPageViewModel);
else
viewModelType = typeof(SamplePageViewModel);
}

return serviceProvider.GetService(viewModelType);
});
}

// Enable the prelaunch if needed, and activate the window
Expand Down
843 changes: 422 additions & 421 deletions samples/MvvmSampleUwp/MvvmSampleUwp.csproj
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34 changes: 34 additions & 0 deletions samples/MvvmSampleUwp/ViewModelLocator.cs
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@@ -0,0 +1,34 @@
using System;
using Windows.UI.Xaml;

namespace MvvmSampleUwp;
public static class ViewModelLocator
{
private static Func<object, object>? _viewModelFactory;

public static readonly DependencyProperty InitViewModelProperty =
DependencyProperty.RegisterAttached("InitViewModel", typeof(bool?), typeof(ViewModelLocator), new PropertyMetadata(null, OnInitViewModelChanged));

public static bool? GetInitViewModel(DependencyObject dependencyObject)
{
return (bool?)dependencyObject.GetValue(InitViewModelProperty);
}

public static void SetInitViewModel(DependencyObject dependencyObject, bool? value)
{
dependencyObject.SetValue(InitViewModelProperty, value);
}

private static void OnInitViewModelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var needSet = (bool?)e.NewValue;
if (needSet == true && d is FrameworkElement element)
{
var viewModel = _viewModelFactory?.Invoke(d);
element.DataContext = viewModel;
}
}

public static void SetViewModelFactory(Func<object, object> factory)
=> _viewModelFactory = factory;
}
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/AsyncRelayCommandPage.xaml
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Expand Up @@ -8,9 +8,11 @@
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="AsyncRelayCommand" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/AsyncRelayCommandPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,8 +15,6 @@ public sealed partial class AsyncRelayCommandPage : Page
public AsyncRelayCommandPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<AsyncRelayCommandPageViewModel>();
}

public AsyncRelayCommandPageViewModel ViewModel => (AsyncRelayCommandPageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/BuildingTheUIPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="PuttingThingsTogether" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/BuildingTheUIPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,8 +15,6 @@ public sealed partial class BuildingTheUIPage : Page
public BuildingTheUIPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<SamplePageViewModel>();
}

public SamplePageViewModel ViewModel => (SamplePageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/IntroductionPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="Introduction" />
Expand Down
5 changes: 1 addition & 4 deletions samples/MvvmSampleUwp/Views/IntroductionPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,9 +15,7 @@ public sealed partial class IntroductionPage : Page
public IntroductionPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<ObservableObjectPageViewModel>();
}

public ObservableObjectPageViewModel ViewModel => (ObservableObjectPageViewModel)DataContext;
public SamplePageViewModel ViewModel => (SamplePageViewModel)DataContext;
}
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/IocPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="Ioc" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/IocPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,8 +15,6 @@ public sealed partial class IocPage : Page
public IocPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<IocPageViewModel>();
}

public IocPageViewModel ViewModel => (IocPageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/MessengerPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="Messenger" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/MessengerPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,8 +15,6 @@ public sealed partial class MessengerPage : Page
public MessengerPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<MessengerPageViewModel>();
}

public MessengerPageViewModel ViewModel => (MessengerPageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/MessengerRequestPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="Messenger" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/MessengerRequestPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
Expand All @@ -17,8 +16,6 @@ public sealed partial class MessengerRequestPage : Page
public MessengerRequestPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<MessengerPageViewModel>();
}

public MessengerPageViewModel ViewModel => (MessengerPageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/MessengerSendPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="Messenger" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/MessengerSendPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
Expand All @@ -17,8 +16,6 @@ public sealed partial class MessengerSendPage : Page
public MessengerSendPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<MessengerPageViewModel>();
}

public MessengerPageViewModel ViewModel => (MessengerPageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/ObservableObjectPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="ObservableObject" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/ObservableObjectPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,8 +15,6 @@ public sealed partial class ObservableObjectPage : Page
public ObservableObjectPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<ObservableObjectPageViewModel>();
}

public ObservableObjectPageViewModel ViewModel => (ObservableObjectPageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/ObservableValidatorPage.xaml
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Expand Up @@ -7,9 +7,11 @@
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:widgets="using:MvvmSampleUwp.Views.Widgets"
xmlns:widgets="using:MvvmSampleUwp.Views.Widgets"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="ObservableValidator" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/ObservableValidatorPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,8 +15,6 @@ public sealed partial class ObservableValidatorPage : Page
public ObservableValidatorPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<ObservableValidatorPageViewModel>();
}

public ObservableValidatorPageViewModel ViewModel => (ObservableValidatorPageViewModel)DataContext;
Expand Down
6 changes: 4 additions & 2 deletions samples/MvvmSampleUwp/Views/PuttingThingsTogetherPage.xaml
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Expand Up @@ -6,9 +6,11 @@
xmlns:core="using:Microsoft.Xaml.Interactions.Core"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:mvvmSampleUwp="using:MvvmSampleUwp"
NavigationCacheMode="Enabled"
mc:Ignorable="d">
mc:Ignorable="d"
mvvmSampleUwp:ViewModelLocator.InitViewModel="True">
<interactivity:Interaction.Behaviors>
<core:EventTriggerBehavior EventName="Loaded">
<core:InvokeCommandAction Command="{x:Bind ViewModel.LoadDocsCommand}" CommandParameter="PuttingThingsTogether" />
Expand Down
3 changes: 0 additions & 3 deletions samples/MvvmSampleUwp/Views/PuttingThingsTogetherPage.xaml.cs
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Expand Up @@ -2,7 +2,6 @@
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using CommunityToolkit.Mvvm.DependencyInjection;
using MvvmSample.Core.ViewModels;
using Windows.UI.Xaml.Controls;

Expand All @@ -16,8 +15,6 @@ public sealed partial class PuttingThingsTogetherPage : Page
public PuttingThingsTogetherPage()
{
this.InitializeComponent();

DataContext = Ioc.Default.GetRequiredService<SamplePageViewModel>();
}

public SamplePageViewModel ViewModel => (SamplePageViewModel)DataContext;
Expand Down
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