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c# 註冊event用匿名函數的方法

admin 11月 11, 2020 0

之前介紹過Event以下的用法:

var worker = new Worker();
worker.WorkPerformed += new EventHandler<WorkPerformedEventArgs>(Worker_WorkPerformed);

public static void Worker_WorkPerformed(object sender, WorkPerformedEventArgs e)
{
    Console.WriteLine(e.Hours + " " + e.WorkType);
}

但是如果不想要特別定義一個函數的話其實可以用匿名函數的方式:

var worker = new Worker();
worker.WorkPerformed += delegate(object sender, WorkPerformedEventArgs e)
    {
        Console.WriteLine(e.Hours + " " + e.WorkType);
    }

不過這個方法的缺點就是函數無法被重複使用了。