更新客户端渲染，更新了壳

参考/wpfui-main/samples/Wpf.Ui.Demo.Mvvm/ViewModels/DashboardViewModel.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+namespace Wpf.Ui.Demo.Mvvm.ViewModels;
+
+public partial class DashboardViewModel : ViewModel
+{
+    [ObservableProperty]
+    private int _counter = 0;
+
+    [RelayCommand]
+    private void OnCounterIncrement()
+    {
+        Counter++;
+    }
+}

参考/wpfui-main/samples/Wpf.Ui.Demo.Mvvm/ViewModels/DataViewModel.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+using System.Windows.Media;
+using Wpf.Ui.Demo.Mvvm.Models;
+
+namespace Wpf.Ui.Demo.Mvvm.ViewModels;
+
+public partial class DataViewModel : ViewModel
+{
+    private bool _isInitialized = false;
+
+    [ObservableProperty]
+    private List<DataColor> _colors = [];
+
+    public override void OnNavigatedTo()
+    {
+        if (!_isInitialized)
+        {
+            InitializeViewModel();
+        }
+    }
+
+    private void InitializeViewModel()
+    {
+        var random = new Random();
+        Colors.Clear();
+
+        for (int i = 0; i < 8192; i++)
+        {
+            Colors.Add(
+                new DataColor
+                {
+                    Color = new SolidColorBrush(
+                        Color.FromArgb(
+                            (byte)200,
+                            (byte)random.Next(0, 250),
+                            (byte)random.Next(0, 250),
+                            (byte)random.Next(0, 250)
+                        )
+                    ),
+                }
+            );
+        }
+
+        _isInitialized = true;
+    }
+}

参考/wpfui-main/samples/Wpf.Ui.Demo.Mvvm/ViewModels/MainWindowViewModel.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+using System.Collections.ObjectModel;
+using Wpf.Ui.Controls;
+
+namespace Wpf.Ui.Demo.Mvvm.ViewModels;
+
+public partial class MainWindowViewModel : ViewModel
+{
+    private bool _isInitialized = false;
+
+    [ObservableProperty]
+    private string _applicationTitle = string.Empty;
+
+    [ObservableProperty]
+    private ObservableCollection<object> _navigationItems = [];
+
+    [ObservableProperty]
+    private ObservableCollection<object> _navigationFooter = [];
+
+    [ObservableProperty]
+    private ObservableCollection<MenuItem> _trayMenuItems = [];
+
+    [System.Diagnostics.CodeAnalysis.SuppressMessage(
+        "Style",
+        "IDE0060:Remove unused parameter",
+        Justification = "Demo"
+    )]
+    public MainWindowViewModel(INavigationService navigationService)
+    {
+        if (!_isInitialized)
+        {
+            InitializeViewModel();
+        }
+    }
+
+    private void InitializeViewModel()
+    {
+        ApplicationTitle = "WPF UI - MVVM Demo";
+
+        NavigationItems =
+        [
+            new NavigationViewItem()
+            {
+                Content = "Home",
+                Icon = new SymbolIcon { Symbol = SymbolRegular.Home24 },
+                TargetPageType = typeof(Views.Pages.DashboardPage),
+            },
+            new NavigationViewItem()
+            {
+                Content = "Data",
+                Icon = new SymbolIcon { Symbol = SymbolRegular.DataHistogram24 },
+                TargetPageType = typeof(Views.Pages.DataPage),
+            },
+        ];
+
+        NavigationFooter =
+        [
+            new NavigationViewItem()
+            {
+                Content = "Settings",
+                Icon = new SymbolIcon { Symbol = SymbolRegular.Settings24 },
+                TargetPageType = typeof(Views.Pages.SettingsPage),
+            },
+        ];
+
+        TrayMenuItems = [new() { Header = "Home", Tag = "tray_home" }];
+
+        _isInitialized = true;
+    }
+}

参考/wpfui-main/samples/Wpf.Ui.Demo.Mvvm/ViewModels/SettingsViewModel.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+namespace Wpf.Ui.Demo.Mvvm.ViewModels;
+
+public partial class SettingsViewModel : ViewModel
+{
+    private bool _isInitialized = false;
+
+    [ObservableProperty]
+    private string _appVersion = string.Empty;
+
+    [ObservableProperty]
+    private Wpf.Ui.Appearance.ApplicationTheme _currentApplicationTheme = Wpf.Ui
+        .Appearance
+        .ApplicationTheme
+        .Unknown;
+
+    public override void OnNavigatedTo()
+    {
+        if (!_isInitialized)
+        {
+            InitializeViewModel();
+        }
+    }
+
+    private void InitializeViewModel()
+    {
+        CurrentApplicationTheme = Wpf.Ui.Appearance.ApplicationThemeManager.GetAppTheme();
+        AppVersion = $"Wpf.Ui.Demo.Mvvm - {GetAssemblyVersion()}";
+
+        _isInitialized = true;
+    }
+
+    private static string GetAssemblyVersion()
+    {
+        return System.Reflection.Assembly.GetExecutingAssembly().GetName().Version?.ToString()
+            ?? string.Empty;
+    }
+
+    [RelayCommand]
+    private void OnChangeTheme(string parameter)
+    {
+        switch (parameter)
+        {
+            case "theme_light":
+                if (CurrentApplicationTheme == Wpf.Ui.Appearance.ApplicationTheme.Light)
+                {
+                    break;
+                }
+
+                Wpf.Ui.Appearance.ApplicationThemeManager.Apply(Wpf.Ui.Appearance.ApplicationTheme.Light);
+                CurrentApplicationTheme = Wpf.Ui.Appearance.ApplicationTheme.Light;
+
+                break;
+
+            default:
+                if (CurrentApplicationTheme == Wpf.Ui.Appearance.ApplicationTheme.Dark)
+                {
+                    break;
+                }
+
+                Wpf.Ui.Appearance.ApplicationThemeManager.Apply(Wpf.Ui.Appearance.ApplicationTheme.Dark);
+                CurrentApplicationTheme = Wpf.Ui.Appearance.ApplicationTheme.Dark;
+
+                break;
+        }
+    }
+}

参考/wpfui-main/samples/Wpf.Ui.Demo.Mvvm/ViewModels/ViewModel.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+using Wpf.Ui.Abstractions.Controls;
+
+namespace Wpf.Ui.Demo.Mvvm.ViewModels;
+
+public abstract class ViewModel : ObservableObject, INavigationAware
+{
+    /// <inheritdoc />
+    public virtual Task OnNavigatedToAsync()
+    {
+        OnNavigatedTo();
+
+        return Task.CompletedTask;
+    }
+
+    /// <summary>
+    /// Handles the event that is fired after the component is navigated to.
+    /// </summary>
+    // ReSharper disable once MemberCanBeProtected.Global
+    public virtual void OnNavigatedTo() { }
+
+    /// <inheritdoc />
+    public virtual Task OnNavigatedFromAsync()
+    {
+        OnNavigatedFrom();
+
+        return Task.CompletedTask;
+    }
+
+    /// <summary>
+    /// Handles the event that is fired before the component is navigated from.
+    /// </summary>
+    // ReSharper disable once MemberCanBeProtected.Global
+    public virtual void OnNavigatedFrom() { }
+}