program.cs

C#2.0宝典源码,C#经典书籍,很多例子

using System;
using System.Collections.Generic;
using System.Text;

namespace Example12_2 {
    class Program {
        static void Main(string[] args) {
            StudentList myStudentList = new StudentList();			//创建一个StudentList型的变量。

            //使用迭代器获得myStudentList的字段值
            foreach (object student in myStudentList) {
                Console.WriteLine(student.ToString());				//输出当前遍历的变量值。
            }

            Console.ReadLine();
        }
    }

    /// <summary>
    /// StudentList类
    /// </summary>
    class StudentList {
        string student1 = "甲";
        string student2 = "乙";
        string student3 = "丙";
        string student4 = "丁";
        string student5 = "戊";

        /// <summary>
        /// Student1属性
        /// </summary>
        public string Student1 {
            get {
                return student1;
            }
            set {
                student1 = value;
            }
        }

        /// <summary>
        /// Student2属性
        /// </summary>
        public string Student2 {
            get {
                return student2;
            }
            set {
                student2 = value;
            }
        }

        /// <summary>
        /// Student3属性
        /// </summary>
        public string Student3 {
            get {
                return student3;
            }
            set {
                student3 = value;
            }
        }

        /// <summary>
        /// Student4属性
        /// </summary>
        public string Student4 {
            get {
                return student4;
            }
            set {
                student4 = value;
            }
        }

        /// <summary>
        /// Student5属性
        /// </summary>
        public string Student5 {
            get {
                return student5;
            }
            set {
                student5 = value;
            }
        }

        /// <summary>
        /// 类StudentList的迭代器
        /// </summary>
        public System.Collections.IEnumerator GetEnumerator() {
            //通过for循环对StudentList类中的5个string类型的变量进行处理。
            for (int i = 0; i < 5; i++) {
                //通过switch对for循环中的i进行判断，返回相应的变量。
                switch (i) {
                    case 0:
                        yield return student1;
                        break;
                    case 1:
                        yield return student2;
                        break;
                    case 2:
                        yield return student3;
                        break;
                    case 3:
                        yield return student4;
                        break;
                    case 4:
                        yield return student5;
                        break;
                }
            }
        }
    }
}