■ IsListNullOrEmptyConverter 엘리먼트에서 IEnumerable 객체가 null이거나 비어있는지 여부 변환자를 사용하는 방법을 보여준다.
▶ MainPage.xaml
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<?xml version="1.0" encoding="utf-8" ?> <ContentPage x:Class="TestProject.MainPage" xmlns="http://schemas.microsoft.com/dotnet/2021/maui" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"> <ContentPage.Resources> <toolkit:IsListNullOrEmptyConverter x:Key="IsListNullOrEmptyConverterKey" /> </ContentPage.Resources> <Label HorizontalOptions="Center" VerticalOptions="Center" FontSize="24" Text="{Binding SelectedList, Converter={StaticResource IsListNullOrEmptyConverterKey}}" /> </ContentPage> |
▶ MainPage.xaml.cs
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namespace TestProject; /// <summary> /// 메인 페이지 /// </summary> public partial class MainPage : ContentPage { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 선택 리스트 - SelectedList /// <summary> /// 선택 리스트 /// </summary> public List<int> SelectedList { get; set; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainPage() /// <summary> /// 생성자 /// </summary> public MainPage() { InitializeComponent(); SelectedList = new List<int>() { 10, 20, 30 }; BindingContext = this; } #endregion } |
▶ MauiProgram.cs
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using CommunityToolkit.Maui; namespace TestProject; /// <summary> /// MAUI 프로그램 /// </summary> public static class MauiProgram { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region MAUI 앱 생성하기 - CreateMauiApp() /// <summary> /// MAUI 앱 생성하기 /// </summary> /// <returns>MAUI 앱</returns> public static MauiApp CreateMauiApp() { MauiAppBuilder builder = MauiApp.CreateBuilder(); builder .UseMauiApp<App>() .UseMauiCommunityToolkit() .ConfigureFonts ( fontCollection => { fontCollection.AddFont("OpenSans-Regular.ttf" , "OpenSansRegular" ); fontCollection.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold"); } ); return builder.Build(); } #endregion } |
