C# 控制台 文件保存教师信息 实现教师注册登陆功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace Student_Teacher
{
    struct StructOfTeacher
    {
        public string Name;
        public string Password;
        public string Course;
    }
    class Program
    {
        static void Main(string[] args)
        {
            StructOfTeacher TheLoginTeacher = new StructOfTeacher();

            WelComeTeacher(ref TheLoginTeacher);
            if (TheLoginTeacher.Name!="")
            ShowTeacherInfo(TheLoginTeacher);
            Console.ReadKey();
        }

        //教师登录模块1--用途：询问“注册教师信息还是教师登录”，并调用相应函数
        static void WelComeTeacher(ref StructOfTeacher Teacher)
        {
            Console.WriteLine("欢迎使用学生管理系统，为确保你是教师身份，请输入密钥：");
            string Key = Console.ReadLine().Trim();
            if (Key == "123")
            {
                Console.WriteLine("老师好，现在你可以开始使用学生管理系统了！");
                Console.WriteLine("1.没有账号？请先注册教师账号！");
                Console.WriteLine("2.我有账号？请先使用账号登录！");
                Console.WriteLine("3.时机未成熟，放弃使用本系统！");
                Console.WriteLine("<------------选择操作选项------------>");
                string Type=Console.ReadLine().Trim();
                Console.WriteLine("<------------选择操作完毕------------>");
                Console.WriteLine();
                switch (Type)
                {
                    case "1": { RegisterTeacher(); Teacher=LoginTeacher(); } break;
                    case "2": Teacher=LoginTeacher(); break;
                    default: Teacher.Name=""; break;
                }
                
            }
            else
            {
                Console.WriteLine("真不好意思，你不是教师，本系统不能为你服务！");
                Teacher.Name = "";
            }
        }

        //教师登录模块2--用途：注册教师信息，并追加至教师文件中
        static void RegisterTeacher()
        {
            Console.WriteLine("<------------注册教师信息------------>");
            bool ReDoIt = true;
            while (ReDoIt)
            {   
                bool HaveName = false;
              
                Console.WriteLine("请在以下一行填写你的信息，格式为‘姓名-密码-课程’：");
                string TeacherInfo = Console.ReadLine().Trim();
                StrWillBeOk1(ref TeacherInfo);//验证输入的字符串是否有效
                string[] theTeacherInfo = TeacherInfo.Split('-');
                if (File.Exists(@"..\..\Teacher.txt"))
                {
                    string[] TeachersHave = File.ReadAllLines(@"..\..\Teacher.txt");

                    foreach (string s in TeachersHave)
                    {
                        string[] oneTeacherInfo = s.Split('-');
                        if (oneTeacherInfo[0] == theTeacherInfo[0])
                        {
                            Console.WriteLine("用户名已经存在！");
                            HaveName = true;
                            break;
                        }
                    }
                    if (!HaveName)
                    {
                        AppendTextToFile(@"..\..\Teacher.txt", TeacherInfo);
                        ReDoIt = false;
                    }
                    else
                    {
                        ReDoIt = true;
                    }
                }
                else
                {
                    AppendTextToFile(@"..\..\Teacher.txt", TeacherInfo);
                    ReDoIt = false;
                }
            }
            Console.WriteLine("注册成功！");
            Console.WriteLine("<------------注册教师完毕------------>");
            Console.WriteLine();
        }

        //教师登录模块3--用途：教师登录界面
        static StructOfTeacher LoginTeacher()
        {
            bool HaveYourName = false;//用于验证姓名是否存在
            bool YourPasswordRight = false;//验证密码是否正确
            bool toBecontinue = true;//如果登录不成功，则需要重新输入信息以便登录
            StructOfTeacher TheLoginTeacher = new StructOfTeacher();
            Console.WriteLine("<------------教师登录验证------------>");
            while (toBecontinue)
            {
                Console.WriteLine("请在以下一行输入你的信息，格式为‘姓名-密码’：");
                string yourInfo = Console.ReadLine();
                StrWillBeOk2(ref yourInfo);//验证输入的字符串是否有效
                string[] theTeacherInfo = yourInfo.Split('-');

                if (File.Exists(@"..\..\Teacher.txt"))
                {
                    string[] TeachersInfo = File.ReadAllLines(@"..\..\Teacher.txt");
                    foreach (string s in TeachersInfo)
                    {
                        string[] oneTeacherInfo = s.Split('-');
                        if (oneTeacherInfo[0] == theTeacherInfo[0])//验证姓名是否存在
                        {
                            HaveYourName = true;
                            if (oneTeacherInfo[1] == theTeacherInfo[1])//验证密码是否正确
                            { 
                                YourPasswordRight = true;
                                toBecontinue = false;
                                //保存成功登陆的教师的所有信息
                                TheLoginTeacher.Name = oneTeacherInfo[0];
                                TheLoginTeacher.Password = oneTeacherInfo[1];
                                TheLoginTeacher.Course = oneTeacherInfo[2];
                            }
                            break;
                        }
                    }
                    if (!HaveYourName)
                    {
                        Console.WriteLine("姓名不存在！");
                        toBecontinue = true;
                    }
                    else
                        if (!YourPasswordRight)
                        {
                            Console.WriteLine("密码不正确！");
                            toBecontinue = true;
                        }
                }
            }
            Console.WriteLine("登录成功！");

            Console.WriteLine("<------------登录验证完毕------------>");
            Console.WriteLine();
            return TheLoginTeacher;
        }
        
        //教师登录模块4--用途：显示教师的详细信息
        static void ShowTeacherInfo(StructOfTeacher Teacher)
        {
            Console.WriteLine(" ----------------");
            Console.WriteLine("|姓名：{0,-10}|", Teacher.Name);
            Console.WriteLine("|密码：{0,-10}|", Teacher.Password);
            Console.WriteLine("|课程：{0,-10}|", Teacher.Course);
            Console.WriteLine(" ----------------");
        }

        //文件操作函数1--用途：追加若干字符串到现有的文件当中。如果文件不存在，则自动创建文件，然后追加。
        static void AppendTextToFile(string path,params string[] strWillAdd)
        { 
            try
            {
                using (StreamWriter sw = File.AppendText(path))
                {
                    foreach (string s in strWillAdd)
                    {
                        sw.WriteLine(s);
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }

        //文件操作函数2--用途:创建一个新文件，在其中写入若干行字符串，然后关闭该文件。如果目标文件已存在，则覆盖该文件以及文件以内的所有内容。
        static void CreateTextToFile(string path, params string[] strWillAdd)
        {
            try
            {
                using (StreamWriter sw = File.CreateText(path))
                {
                    foreach (string s in strWillAdd)
                    {
                        sw.WriteLine(s);
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }

        //文件操作函数3--用途：创建一个新文件，在其中写入指定的字符串数组，然后关闭该文件。如果目标文件已存在，则覆盖该文件。
        static void WriteAllLinesToFile(string path, string[] strArrayWillAdd)
        {
            try
            {
                File.WriteAllLines(path, strArrayWillAdd);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }

        //输入格式验证1--用途：验证输入的‘姓名-密码-课程’是否符合格式，不符合，则提示重新输入，并覆盖原来的值
        static void StrWillBeOk1(ref String str)
        {
             bool toBeContinue = false;
             string[] strSplit = new string[3];

             while (!toBeContinue)
             {
                 strSplit = str.Split('-');
                 try
                 {
                     bool strIsOk = true;
                     if (strSplit.Length != 3)
                         strIsOk = false;
                     foreach (string s in strSplit)
                         if (s == "")
                         {
                             strIsOk = false;
                             break;
                         }
                     if (!strIsOk)
                         throw new ArgumentException();
                     else
                         toBeContinue = true;
                        
                 }
                 catch (ArgumentException e)
                 { 
                     Console.WriteLine("格式不正确，请严格按照‘姓名-密码-课程’输入！");
                     str = Console.ReadLine();
                 }
             }   
        }

        //输入格式验证2--用途：验证输入的‘姓名-密码’是否符合格式，不符合，则提示重新输入，并覆盖原来的值
        static void StrWillBeOk2(ref String str)
        {
             bool toBeContinue = false;
             string[] strSplit = new string[2];

             while (!toBeContinue)
             {
                 strSplit = str.Split('-');
                 try
                 {
                     bool strIsOk = true;
                     if (strSplit.Length != 2)
                         strIsOk = false;
                     foreach (string s in strSplit)
                         if (s == "")
                         {
                             strIsOk = false;
                             break;
                         }
                     if (!strIsOk)
                         throw new ArgumentException();
                     else
                         toBeContinue = true;
                        
                 }
                 catch (ArgumentException e)
                 { 
                     Console.WriteLine("格式不正确，请严格按照‘姓名-密码’输入！");
                     str = Console.ReadLine();
                 }
             }   
        }

    }
}