C#练习笔记3：分部类分部方法，索引结合异常的使用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {

            //分部类测试
            Test01 tt = new Test01();

            tt[0] = "adfad";
            tt[1] = "adsfa";
            tt[2] = "fadsaf";

            Console.WriteLine(tt[0]);
            Console.WriteLine(tt[3]);


            //分部类分部方法测试
            Test te = new Test();
            te.Add(8, 9);

            Console.Read();

        }

        /// <summary>
        /// 分部类，
        /// </summary>
        partial class Test
        {

            //分部方法
            partial void PrintSum(int x, int y);

            public void Add(int x, int y)
            {
                PrintSum(x, y);
            }
        }

        partial class Test
        {
            partial void PrintSum(int x, int y)
            {
                Console.WriteLine(x + y);
            }
        }


        class Test01
        {
            string str1;
            string str2;

            //索引的运用
　　　　　　　//类似于属性

            public string this[int index]
            {
                set
                {
                    switch (index)
                    {
                        case 0:
                            str1 = value;
                            break;
                        case 1:
                            str2 = value;
                            break;
                        default:
                            //throw new IndexOutOfRangeException("索引越界");
                            Console.WriteLine("索引越界");
                            break;
                    }
                }

                get
                {
                    try
                    {

                        if (index == 0)
                            return str1;
                        if(index==1)
                            return str2;
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine(e.Message);
                    }
                    return "索引超出界限";
                }

            }

        }
    }
}