IO预约

namespace IODemo
{
    class Program
    {
        static void Main(string[] args)
        {
            String path = "C:\\YuYue.txt";
            StreamWriter sw = null;
            try
            {
                Console.WriteLine("1.Add Appointments\n2.View Appointments\n3.Search\n4.Exit");
                Console.Write("Enter Choice：");
                int i = int.Parse(Console.ReadLine());
                switch (i)
                {
                    case 1:
                        FileInfo fi = new FileInfo(path);
                        sw = fi.AppendText();
                        Console.Write("请输入约定日期(YYYY-MM-DD):");
                        String date = Console.ReadLine();
                        sw.Write(date + " " + "\t");
                        Console.Write("预约人:");
                        String peo = Console.ReadLine();
                        sw.Write(peo + " " + "\t");
                        Console.Write("请输入约定时间:");
                        String time = Console.ReadLine();
                        sw.Write(time + " " + "\t");
                        sw.WriteLine();
                        Console.WriteLine("数据写入成功!");
                        sw.Close();
                        break;
                    case 2:
                        using (StreamReader sr = new StreamReader(path))
                        {
                            String text = sr.ReadToEnd();
                            Console.WriteLine("显示所添加的预约信息：");
                            Console.WriteLine("预约时间\t预约人\t预约信息");
                            Console.WriteLine(text);
                        }

                        break;
                    case 3:
                        using (StreamReader sr = new StreamReader(path))
                        {
                            Console.Write("请输入要查看约定信息的日期(YYYY-MM-DD)：");
                            date = Console.ReadLine();
                            String str;//读取一行
                            while ((str = sr.ReadLine()) != null)
                            {
                                String[] arr = str.Split(' ');
                                if (date == arr[0])
                                {
                                    Console.WriteLine(arr[0] + arr[1] + arr[2]);
                                }
                            }
                        }
                        break;
                    case 4:
                        Console.WriteLine();
                        return;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            Console.ReadKey();
        }
    }
}