泛型(Generic)委托
您可以通过类型参数定义泛型委托。例如:
delegate T NumberChanger<T>(T n);
下面的实例演示了委托的使用:
using System;
using System.Collections.Generic;
delegate T NumberChanger<T>(T n);
namespace GenericDelegateAppl
{
class TestDelegate
{
static int num = 10;
public static int AddNum(int p)
{
num += p;
return num;
}
public static int MultNum(int q)
{
num *= q;
return num;
}
public static int getNum()
{
return num;
}
static void Main(string[] args)
{
// 创建委托实例
NumberChanger<int> nc1 = new NumberChanger<int>(AddNum);
NumberChanger<int> nc2 = new NumberChanger<int>(MultNum);
// 使用委托对象调用方法
nc1(25);
Console.WriteLine("Value of Num: {0}", getNum());
nc2(5);
Console.WriteLine("Value of Num: {0}", getNum());
Console.ReadKey();
}
}
}
当上面的代码被编译和执行时,它会产生下列结果:
Value of Num: 35 Value of Num: 175