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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ActionDemo
{
class Program
{
static void Main(string[] args)
{
// 无参数无返回值的委托
Action action1 = new Action(ActionWithNoParaNoReturn);
action1();
Console.WriteLine("----------------------------");
// 使用delegate
Action action2 = delegate { Console.WriteLine("这里是使用delegate"); };
// 执行
action2();
Console.WriteLine("----------------------------");
// 使用匿名委托
Action action3 = () => { Console.WriteLine("这里是匿名委托"); };
action3();
Console.WriteLine("----------------------------");
// 有参数无返回值的委托
Action<int> action4 = new Action<int>(ActionWithPara);
action4(23);
Console.WriteLine("----------------------------");
// 使用delegate
Action<int> action5 = delegate (int i) { Console.WriteLine($"这里是使用delegate的委托，参数值是：{i}"); };
action5(45);
Console.WriteLine("----------------------------");
// 使用匿名委托
Action<string> action6 = (string s) => { Console.WriteLine($"这里是使用匿名委托，参数值是:{s}"); };
action6("345");
Console.WriteLine("----------------------------");
// 多个参数无返回值的委托
Action<int, string> action7 = new Action<int, string>(ActionWithMulitPara);
action7(7, "abc");
Console.WriteLine("----------------------------");
// 使用delegate
Action<int, int, string> action8 = delegate (int i1, int i2, string s)
{
Console.WriteLine($"这里是三个参数的Action委托，参数1的值是：{i1}，参数2的值是：{i2}，参数3的值是：{s}");
};
action8(12, 34, "abc");
Console.WriteLine("----------------------------");
Action<int,int,string, string> action9 = (int i1,int i2, string s1,string s2) =>
{
Console.WriteLine($"这里是使用四个参数的委托，参数1的值是：{i1},参数2的值是：{i2}，参数3的值是：{s1}，参数4的值是：{s2}");
};
// 执行委托
action9(34,56, "abc","def");
Console.ReadKey();
}
static void ActionWithNoParaNoReturn()
{
Console.WriteLine("这是无参数无返回值的Action委托");
}
static void ActionWithPara(int i)
{
Console.WriteLine($"这里是有参数无返回值的委托，参数值是：{i}");
}
static void ActionWithMulitPara(int i,string s)
{
Console.WriteLine($"这里是有两个参数无返回值的委托，参数1的值是：{i}，参数2的值是：{s}");
}
}
}
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