c#编码技巧(三)：EventArgs的使用

 c#编码技巧(三)：EventArgs的使用

如果有多个类要打印信息，如Student类，Teacher类，School类...如下代码。各类统一继承于EventArgs的话，那么传参就很方便了。

using System;
using System.Collections.Generic;namespace ConsoleTest
{class Program{//把打印信息统一为一个函数，一个EventArgs参数。private static string ShowMessage(EventArgs e){if (e is Student)               //判断参数类型{var student = e as Student; //把参数转换为Student类return student.Name + ", address = " + student.Address;}else if (e is Teacher){var teacher = e as Teacher;return teacher.Name + ", course = " + teacher.Course;}elsereturn "Not found";}static void Main(string[] args){Console.WriteLine(ShowMessage(new Student("James","杭州")));Console.WriteLine(ShowMessage(new Teacher("Jack", "英语")));Console.ReadKey();}//继承于EventArgs，便于传参public class Student : EventArgs    {public string Name { get; set; }public int Age { get; set; }public string Address { get; set; }public Student(string name, string address){this.Name = name;this.Address = address;}}//继承于EventArgs，便于传参public class Teacher : EventArgs{public string Name { get; set; }public string ClassId { get; set; }public string Course { get; set; }public Teacher(string name, string course){this.Name = name;this.Course = course;}}}
}

输出：

James, address = 杭州
Jack, course = 英语