C#中的Action<>和Func<>以及传统的委托

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委托就是函数的引用,action<>指定那些只有输入参数,没有返回值的委托,Fun<>是有返回值的委托


1: 传统的Delegate的代码

public delegate void myDelegate(string str);public static void HellowChinese(string strChinese){Console.WriteLine("Good morning," + strChinese);Console.ReadLine();}myDelegate d = new myDelegate(HellowChinese);d("Mr wang");

2: public delegate void Action<T>(T arg)

public static void HellowChinese(string strChinese){Console.WriteLine("Good morning," + strChinese);Console.ReadLine();}Action<string> action = HellowChinese;action("Spring.");

3: public delegate TResult Func<T,TResult>(T arg)这个和上面的那个是一样的,区别是这个有返回值!

public static string HelloEnglish(string strEnglish){return "Hello." + strEnglish;}Func<string, string> f = HelloEnglish;Console.WriteLine(f("Srping ji"));Console.ReadLine();



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