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阿新 • • 發佈:2021-12-07
當某個值發生變化時,將觸發事件;
using System; using System.ComponentModel; namespace ConsoleApp1 { class Program { static void Main(string[] args) { //TestClassCSharp6 test = new TestClassCSharp6(); //Console.WriteLine(test.Name); #region 事件 NotfifyPropertyChanged notfifyPropertyChanged = new NotfifyPropertyChanged(); notfifyPropertyChanged.PropertyChanged += NotfifyPropertyChanged_PropertyChanged; notfifyPropertyChanged.LastName = "SHa.Jazy"; notfifyPropertyChanged.LastName = "SHa.Jazyfdasf"; #endregion } private static void NotfifyPropertyChanged_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e) { Console.WriteLine($"值發生了變化!"); } } public class NotfifyPropertyChanged : INotifyPropertyChanged { public event PropertyChangedEventHandler PropertyChanged; private string lastName; public string LastName { get => lastName; set { if (value != lastName) { lastName = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(LastName))); } } } } }