少有人走的路

如下图所示的“

菜单与工具条

MainWindowViewModel.cs

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

namespace _12_MenuToolbar.ViewModels;

public partial class MainWindowViewModel : ObservableObject
{
    [ObservableProperty]
    private string _statusMessage = "就绪";

    [ObservableProperty]
    private string _currentFile = "未保存";

    [ObservableProperty]
    private bool _isBold;

    [ObservableProperty]
    private bool _isItalic;

    [ObservableProperty]
    private bool _isUnderline;

    [RelayCommand]
    private void NewFile()
    {
        CurrentFile = "未命名.txt";
        StatusMessage = "新建文件";
    }

    [RelayCommand]
    private void OpenFile()
    {
        StatusMessage = "打开文件对话框";
    }

    [RelayCommand]
    private void SaveFile()
    {
        StatusMessage = $"保存文件: {CurrentFile}";
    }

    [RelayCommand]
    private void Exit()
    {
        StatusMessage = "退出应用程序";
    }

    [RelayCommand]
    private void Undo()
    {
        StatusMessage = "撤销";
    }

    [RelayCommand]
    private void Redo()
    {
        StatusMessage = "重做";
    }

    [RelayCommand]
    private void Cut()
    {
        StatusMessage = "剪切";
    }

    [RelayCommand]
    private void Copy()
    {
        StatusMessage = "复制";
    }

    [RelayCommand]
    private void Paste()
    {
        StatusMessage = "粘贴";
    }

    [RelayCommand]
    private void About()
    {
        StatusMessage = "关于 - 菜单和工具栏演示 v1.0";
    }
}

SVG图形显示

SVG资源：

heart.svg

<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
  <path d="M20.84 4.61a5.5 5.5 0 0 0-7.78 0L12 5.67l-1.06-1.06a5.5 5.5 0 0 0-7.78 7.78l1.06 1.06L12 21.23l7.78-7.78 1.06-1.06a5.5 5.5 0 0 0 0-7.78z"></path>
</svg>

多语言

LocalizationService.cs

using System.Collections.Generic;
using System.Globalization;

namespace _10_Localization.Services;

public class LocalizationService
{
    private static LocalizationService? _instance;
    public static LocalizationService Instance => _instance ??= new LocalizationService();

    private string _currentLanguage = "zh-CN";
    public string CurrentLanguage => _currentLanguage;

    public event System.Action? LanguageChanged;

    private readonly Dictionary<string, Dictionary<string, string>> _translations = new()
    {
        ["zh-CN"] = new Dictionary<string, string>
        {
            ["WelcomeText"] = "欢迎",
            ["WelcomeMessage"] = "欢迎使用多语言演示应用",
            ["UsernameLabel"] = "用户名",
            ["PasswordLabel"] = "密码",
            ["LoginButtonText"] = "登录",
            ["RegisterButtonText"] = "注册",
            ["LanguageLabel"] = "语言",
            ["SelectLanguageText"] = "选择语言",
            ["CurrentLanguageText"] = "当前语言：简体中文"
        },
        ["en-US"] = new Dictionary<string, string>
        {
            ["WelcomeText"] = "Welcome",
            ["WelcomeMessage"] = "Welcome to Localization Demo App",
            ["UsernameLabel"] = "Username",
            ["PasswordLabel"] = "Password",
            ["LoginButtonText"] = "Login",
            ["RegisterButtonText"] = "Register",
            ["LanguageLabel"] = "Language",
            ["SelectLanguageText"] = "Select Language",
            ["CurrentLanguageText"] = "Current Language: English"
        },
        ["ja-JP"] = new Dictionary<string, string>
        {
            ["WelcomeText"] = "ようこそ",
            ["WelcomeMessage"] = "多言語デモアプリへようこそ",
            ["UsernameLabel"] = "ユーザー名",
            ["PasswordLabel"] = "パスワード",
            ["LoginButtonText"] = "ログイン",
            ["RegisterButtonText"] = "登録",
            ["LanguageLabel"] = "言語",
            ["SelectLanguageText"] = "言語を選択",
            ["CurrentLanguageText"] = "現在の言語：日本語"
        }
    };

    public string[] AvailableLanguages => new[] { "zh-CN", "en-US", "ja-JP" };

    public string GetLanguageDisplayName(string code) => code switch
    {
        "zh-CN" => "简体中文",
        "en-US" => "English",
        "ja-JP" => "日本語",
        _ => code
    };

    public void SetLanguage(string languageCode)
    {
        if (_translations.ContainsKey(languageCode) && _currentLanguage != languageCode)
        {
            _currentLanguage = languageCode;
            LanguageChanged?.Invoke();
        }
    }

    public string this[string key]
    {
        get
        {
            if (_translations.TryGetValue(_currentLanguage, out var dict) && dict.TryGetValue(key, out var value))
                return value;
            return key;
        }
    }
}

页面导航

HomeViewModel.cs

namespace _09_Navigation.ViewModels;

public partial class HomeViewModel : ViewModelBase
{
    public override void OnNavigatedTo()
    {
        System.Console.WriteLine("Home page activated");
    }
}

样式

App.axaml

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="_08_Styles.App">

  <Application.Styles>
    <FluentTheme />
  </Application.Styles>

  <Application.Resources>
    <ResourceDictionary>
      <SolidColorBrush x:Key="PrimaryBrush" Color="#6200EE"/>
      <SolidColorBrush x:Key="SecondaryBrush" Color="#03DAC6"/>
      <SolidColorBrush x:Key="DangerBrush" Color="#CF6679"/>
      <SolidColorBrush x:Key="SuccessBrush" Color="#4CAF50"/>
    </ResourceDictionary>
  </Application.Resources>

</Application>

MVVM演示

TodoItem.cs

namespace _07_MVVM.Models;

public class TodoItem
{
    public required string Title { get; set; }
    public bool IsCompleted { get; set; }
    public string Priority { get; set; } = "Normal";
}

数据绑定

App.axaml

注意如果没有写<FluentTheme/>，则这些Fluent控件将没有效果，比如滑块控件成了一个Lable控件，只显示文字了。

ListBox演示

MainWindow.axaml

MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="_04_TextInput.MainWindow"
        Title="Text Input - 文本输入演示"
        Width="450"
        Height="400">
  <StackPanel Margin="30" Spacing="20">

    <TextBlock Text="TextBox（文本框）" FontSize="16" FontWeight="Bold"/>

    <StackPanel Spacing="5">
      <TextBlock Text="请输入您的名字:"/>
      <TextBox x:Name="NameTextBox"
               Watermark="在这里输入..."
               MaxLength="50"/>
    </StackPanel>

    <StackPanel Spacing="5">
      <TextBlock Text="多行文本框:"/>
      <TextBox x:Name="MultiLineTextBox"
               AcceptsReturn="True"
               AcceptsTab="True"
               TextWrapping="Wrap"
               Height="80"
               Watermark="支持多行输入..."/>
    </StackPanel>

    <Button x:Name="SubmitButton"
            Content="提交"
            HorizontalAlignment="Center"
            Padding="30,10"/>

    <TextBlock x:Name="ResultText"
               Text=""
               FontSize="14"
               Foreground="#2196F3"
               TextWrapping="Wrap"/>

  </StackPanel>
</Window>