■ ObservablePropertyAttribute 클래스에서 필드를 사용해 의존 속성을 만드는 방법을 보여준다.
※ CommunityToolkit.Mvvm 누겟을 설치한다.
▶ 예제 코드 (C#)
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using System.Reflection; using System.Windows.Input; using Windows.ApplicationModel; using Microsoft.UI.Xaml; using CommunityToolkit.Mvvm.ComponentModel; using CommunityToolkit.Mvvm.Input; namespace TestProject; /// <summary> /// 설정 뷰 모델 /// </summary> public partial class SettingViewModel : ObservableRecipient { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 테마 셀렉터 서비스 /// </summary> private readonly IThemeSelectorService themeSelectorService; /// <summary> /// 엘리먼트 테마 /// </summary> [ObservableProperty] private ElementTheme elementTheme; /// <summary> /// 버전 설명 /// </summary> [ObservableProperty] private string versionDescription; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 스위치 테마 명령 - SwitchThemeCommand /// <summary> /// 스위치 테마 명령 /// </summary> public ICommand SwitchThemeCommand { get; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - SettingViewModel(themeSelectorService) /// <summary> /// 생성자 /// </summary> /// <param name="themeSelectorService">테마 셀렉터 서비스</param> public SettingViewModel(IThemeSelectorService themeSelectorService) { this.themeSelectorService = themeSelectorService; this.elementTheme = this.themeSelectorService.Theme; this.versionDescription = GetVersionDescription(); SwitchThemeCommand = new RelayCommand<ElementTheme> ( async (parameter) => { if(ElementTheme != parameter) { ElementTheme = parameter; await this.themeSelectorService.SetThemeAsync(parameter); } } ); } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 버전 설명 구하기 - GetVersionDescription() /// <summary> /// 버전 설명 구하기 /// </summary> /// <returns>버전 설명</returns> private static string GetVersionDescription() { Version version; if(RuntimeHelper.IsMSIX) { PackageVersion packageVersion = Package.Current.Id.Version; version = new(packageVersion.Major, packageVersion.Minor, packageVersion.Build, packageVersion.Revision); } else { version = Assembly.GetExecutingAssembly().GetName().Version!; } return $"{"AppDisplayName".GetLocalString()} - {version.Major}.{version.Minor}.{version.Build}.{version.Revision}"; } #endregion } |