今天我来给大家说说说C#这东西的用处吧。
就拿MyBank系统来讲解吧，望大家好好看将会得到不少的收获哦。
那么这个MyBank系统我们应该怎样来写呢？请看看下面的详细解答。
首先先看一些部分功能的效果图：
想要实现以上的功能以及页面我们改怎么操作呢？
关键时候到了，看清楚了哟：
1.帐户类 User
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace MyBank 7 { 8 /// 9 /// 帐户类 10 /// 11 public class User 12 { 13 #region 成员变量 14 /// 15 /// 帐户姓名 16 /// 17 private string _name; 18 19 public string Name 20 { 21 get { return _name; } 22 set { _name = value; } 23 } 24 25 /// 26 /// 密码 27 /// 28 private string _password; 29 30 public string Password 31 { 32 get { return _password; } 33 set { _password = value; } 34 } 35 36 /// 37 /// 身份证号 38 /// 39 private string _identityNum; 40 41 public string IdentityNum 42 { 43 get { return _identityNum; } 44 set { _identityNum = value; } 45 } 46 47 /// 48 /// 帐户余额 49 /// 50 private double _balance; 51 52 public double Balance 53 { 54 get { return _balance; } 55 set { _balance = value; } 56 } 57 58 /// 59 /// 帐号 60 /// 61 private string _account; 62 63 public string Account 64 { 65 get { return _account; } 66 set { _account = value; } 67 } 68 #endregion 69 70 #region 取款 71 /// 72 /// 取款操作 73 /// 74 /// 要取的金额 75 /// 返回余额，输入有误返回-1 76 public double MinusMoney(double money) 77 { 78 if (money > 0) 79 { 80 if (money <= _balance) 81 { 82 _balance -= money; 83 return _balance; 84 } 85 else 86 { 87 return -1; 88 } 89 90 } 91 else 92 { 93 return -1; 94 } 95 } 96 #endregion 97 98 #region 存款 99 /// 100 /// 存款101 /// 102 /// 存款金额103 public double SaveMoney(double money)104 {105 if (money > 0)106 {107 108 _balance += money;109 return _balance;110 }111 else112 {113 return -1;114 } 115 }116 #endregion117 118 }119 } 2.银行类 Bank
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace MyBank 7 { 8 public class Bank 9 { 10 #region 成员变量的定义 11 User user = new User(); //实例化User对象并赋值 12 User[] _userGroup = new User[3]; 13 const string MESSAGE = "操作成功！"; 14 #endregion 15 16 #region 初始化三个帐户 17 /// 18 /// 初始化三个帐户 19 /// 20 public void Initial() 21 { 22 _userGroup[0] = new User(); 23 _userGroup[0].Account = "179708064356"; 24 _userGroup[0].Name = "王丽丽"; 25 _userGroup[0].Password = "1234"; 26 _userGroup[0].IdentityNum = "210050619890808185"; 27 _userGroup[0].Balance = 1000.1111; 28 29 _userGroup[1] = new User(); 30 _userGroup[1].Account = "179708064359"; 31 _userGroup[1].Name = "张颖颖"; 32 _userGroup[1].Password = "4321"; 33 _userGroup[1].IdentityNum = "510010619891231127"; 34 _userGroup[1].Balance = 2000; 35 36 _userGroup[2] = new User(); 37 _userGroup[2].Account = "179708064368"; 38 _userGroup[2].Name = "刘华"; 39 _userGroup[2].Password = "4567"; 40 _userGroup[2].IdentityNum = "410207198904051271"; 41 _userGroup[2].Balance = 8000; 42 } 43 #endregion 44 45 #region 显示所有帐户信息 46 /// 47 /// 显示所有帐户的帐号、姓名、密码、身份证号、帐户余额 48 /// 49 public void ShowAllUser() 50 { 51 foreach (User userItem in _userGroup) 52 { 53 Console.WriteLine("帐户姓名:" + userItem.Name + " 帐号：" + userItem.Account + " 存款余额：" + userItem.Balance + " 密码：" + userItem.Password + " 身份证号：" + userItem.IdentityNum); 54 } 55 } 56 #endregion 57 58 #region 显示菜单 59 /// 60 /// 显示菜单 61 /// 62 public void ShowCustomMenu() 63 { 64 string option = ""; 65 do 66 { 67 Console.WriteLine(); 68 Console.WriteLine("==================欢迎使用自动银行服务=================="); 69 Console.WriteLine("1:开户 2:存款 3:取款 4:转帐 5:查询余额 6:修改密码 0:退出"); 70 Console.WriteLine("========================================================"); 71 option = Console.ReadLine(); 72 switch (option) 73 { 74 case "1": 75 CreateAccount(); 76 continue; 77 case "2": 78 Deposit(); 79 continue; 80 case "3": 81 WithDraw(); 82 continue; 83 case "4": 84 InputTransferData(); 85 continue; 86 case "5": 87 ShowBalance(); 88 continue; 89 case "6": 90 ModifyPwd(); 91 continue; 92 case "0": 93 break; //结束switch 94 default: 95 Console.WriteLine("输入无效！"); 96 continue; 97 } 98 99 break; //结束do-while循环100 } while (true);101 }102 #endregion103 104 #region 开户105 /// 106 /// 开户107 /// 108 public void CreateAccount()109 {110 //接受输入的数据111 Console.WriteLine("请输入帐户名");112 user.Name = Console.ReadLine();113 user.Account = "179708064356";114 Console.WriteLine("请输入帐户密码");115 user.Password = Console.ReadLine();116 Console.WriteLine("请输入帐户身份证号");117 user.IdentityNum = Console.ReadLine();118 Console.WriteLine("请输入帐户存款金额");119 user.Balance = double.Parse(Console.ReadLine());120 121 Console.WriteLine("帐户：{0}，帐户名：{1}，存款金额：{2}创建成功!", user.Account, user.Name, user.Balance);122 //Console.ReadLine();123 }124 #endregion125 126 #region 取款127 /// 128 /// 取款129 /// 130 public void WithDraw()131 {132 string account = ""; //帐号133 string pwd; //密码134 135 Console.WriteLine("请输入帐号:");136 account = Console.ReadLine();137 if (account.Length == 0)138 {139 Console.WriteLine("输入的帐号不正确！");140 return;141 }142 // 新增：在3个帐户中查找指定的帐户143 User user = CheckUserByAccount(account);144 if (user == null)145 {146 Console.WriteLine("输入的帐号不正确！");147 return;148 }149 150 151 //接收帐户密码，并验证152 Console.WriteLine("请输入帐户密码:");153 pwd = Console.ReadLine();154 155 if (user.Password != pwd)156 {157 Console.WriteLine("密码有误!");158 return;159 }160 161 Console.WriteLine("请输入取款金额");162 double money = double.Parse(Console.ReadLine());163 double result = user.MinusMoney(money);164 if (result == -1)165 {166 Console.WriteLine("取款失败");167 }168 else169 {170 Console.WriteLine("取款成功!当前余额:" + result);171 }172 }173 #endregion174 175 176 #region 存款177 /// 178 /// 存款179 /// 180 public void Deposit()181 {182 string account = ""; //帐号183 double money = 0; //存款金额184 185 Console.WriteLine("请输入帐号:");186 account = Console.ReadLine();187 Console.WriteLine("请输入存入金额:");188 money = double.Parse(Console.ReadLine());189 190 User user;191 if ((user = CheckUserByAccount(account)) == null)192 {193 Console.WriteLine("您输入的帐号不存在!");194 }195 196 if (user.SaveMoney(money) > 0)197 {198 Console.WriteLine(MESSAGE + "当前余额：" + user.Balance);199 }200 else201 {202 Console.WriteLine("存款失败！");203 }204 205 }206 #endregion207 208 #region 判断帐户是否存在209 /// 210 /// 通过帐号判断帐户是否存在211 /// 212 /// 帐号213 /// 存在返回user对象，不存在返回null 214 private User CheckUserByAccount(string account)215 {216 foreach (User user in _userGroup)217 {218 if (user.Account == account)219 {220 return user;221 }222 }223 return null;224 }225 226 /// 227 /// 根据帐号和密码判定帐户是否存在228 /// 229 /// 帐号230 /// 密码231 /// User & null 232 private User CheckUser(string account,string pwd)233 {234 foreach (User user in _userGroup)235 {236 if (user.Account == account && user.Password ==pwd)237 {238 return user;239 }240 }241 return null;242 }243 #endregion244 245 #region 转帐246 /// 247 /// 转帐输入输出信息248 /// 249 public void InputTransferData()250 {251 Console.WriteLine("请输入转出帐号：");252 string fromAccount = Console.ReadLine();253 Console.WriteLine("请输入转出帐户密码：");254 string fromPwd = Console.ReadLine();255 Console.WriteLine("请输入转入帐号：");256 string toAccount = Console.ReadLine();257 Console.WriteLine("请输入转帐金额：");258 double money = double.Parse(Console.ReadLine());259 double fbalance = 0, tbalance = 0;260 261 // 执行转帐操作262 int iRet = Transfer(fromAccount, fromPwd, toAccount, money, ref fbalance, ref tbalance);263 if (iRet == 1)264 {265 Console.WriteLine("转帐成功，转出帐号{0}的余额为：{1}，转入帐号{2}的余额为：{3}", fromAccount, fbalance, toAccount, tbalance);266 }267 else if (iRet == -1)268 {269 Console.WriteLine("转出帐户的帐号或密码输入错误！");270 }271 else if (iRet == -2)272 {273 Console.WriteLine("转入帐号不正确！");274 }275 else if (iRet == -3)276 {277 Console.WriteLine("转帐操作失败！");278 }279 280 }281 282 /// 283 /// 执行转帐操作284 /// 285 /// 当前帐号286 /// 帐号密码287 /// 转帐帐号288 /// 转帐金额289 /// 当前帐号余额290 /// -1：帐号或密码输入错误；1：转帐成功；0：转帐帐号不存在 291 private int Transfer(string fAccount, string fPwd, string tAccount, double money, ref double fBalance, ref double tBalance)292 {293 //检查转出帐号和密码294 User userfrom = CheckUser(fAccount, fPwd);295 if (userfrom == null) //转出帐户和密码不正确296 {297 return -1;298 }299 //检查转入帐号300 User userTo = CheckUserByAccount(tAccount);301 if (userTo == null) //转入帐号不正确302 {303 return -2;304 }305 306 //取款307 if (userfrom.MinusMoney(money) == -1) //转帐操作失败308 {309 return -3;310 }311 //取得余额312 fBalance = userfrom.Balance;313 314 //存款315 if (userTo.SaveMoney(money) == -1) //转帐操作失败316 {317 return -3;318 }319 320 tBalance = userTo.Balance;321 322 return 1;323 324 }325 #endregion326 327 328 #region 显示帐户余额329 /// 330 /// 显示帐户余额331 /// 332 public void ShowBalance()333 {334 string accountName = ""; //当前帐号335 string password = ""; //当前帐户密码336 Console.WriteLine("请输入帐号");337 accountName = Console.ReadLine();338 Console.WriteLine("请输入密码");339 password = Console.ReadLine();340 User user = CheckUser(accountName, password);341 if (user == null)342 {343 Console.WriteLine("当前帐号不存在");344 }345 else346 {347 Console.WriteLine("帐户的余额是:" + user.Balance.ToString ("0.00"));348 }349 }350 #endregion351 352 #region 修改密码353 public void ModifyPwd()354 {355 string accountName = ""; //当前帐号356 string password = ""; //当前帐户密码357 Console.WriteLine("请输入帐号");358 accountName = Console.ReadLine();359 Console.WriteLine("请输入原密码");360 password = Console.ReadLine();361 362 string newPwd1, newPwd2;363 Console.WriteLine("请输入新密码");364 newPwd1 = Console.ReadLine();365 Console.WriteLine("请再次输入新密码");366 newPwd2 = Console.ReadLine();367 368 if(CheckPwd(accountName, password, newPwd1, newPwd2)==true)369 Console.WriteLine("帐户密码修改成功！");370 else371 Console.WriteLine("帐户密码修改失败！");372 373 }374 375 public bool CheckPwd(string accountName, string password, string newPwd1, string newPwd2)376 {377 User user = CheckUser(accountName, password);378 if (user == null)379 {380 Console.WriteLine("当前帐号不存在");381 return false;382 }383 384 if (newPwd1 != newPwd2)385 {386 Console.WriteLine("两只输入的帐户密码不一致！");387 return false;388 }389 else390 {391 user.Password = newPwd1;392 return true;393 } 394 }395 #endregion396 }397 398 }
3.最关键的也是最后的了，Program类， 关于系统运行
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace MyBank 7 { 8 class Program 9 {10 static void Main(string[] args)11 {12 Bank myBank = new Bank();13 14 //开户15 //myBank.CreateAccount();16 17 //初始化数据18 myBank.Initial();19 20 //显示所有帐户21 myBank.ShowAllUser();22 23 //显示菜单24 myBank.ShowCustomMenu();25 26 //取款27 //myBank.WithDraw();28 }29 }30 } 好了，以上就是MyBank银行管理系统了哟