C# 返回到我的应用程序中的特定代码块

我是C#的新手，目前正在开发一个简单的ATM应用程序。我试图编写代码，根据用户输入的字母M将其返回主菜单。在我的场景中，break、continue、goto或return关键字似乎不起作用；也许我用错了。下面的陈述正是我想跳到的地方

Console.WriteLine("Select an option? \n VIEW BALANCE (B1) checking, (B2) saving \n DEPOSIT (C1) checking, (C2) saving \n WITHDRAW (W1) checking, (W2) saving");

我想从switch语句中嵌套的else if语句中的行jump（下面）跳转到上面的代码部分。我怎样才能做到这一点？感谢您的帮助…谢谢

switch (response)
{
    case "C1": 
        Console.WriteLine("How much would you like to deposit to your checking account?");
        string depositEntry = Console.ReadLine();
        double checkingBalance = Convert.ToInt32(depositEntry) + currentCheckingBalance;
        currentCheckingBalance += checkingBalance;
        Console.WriteLine("Your current checking balance is " + checkingBalance + "\n (X) Exit, (M) Main Menu" );

        string selection = Console.ReadLine().ToUpper();
        if (selection == "X")
        {
            return;
        }
        else if (selection == "M")
        {
            ***JUMP***
        }
        else
        {
            Console.WriteLine("Your entry was invalid");
        }


        break;

    case "C2":      

        break;

    case "W1":

---

将跳转代码放入函数中并返回

public void MainMenu() {
    // Show the main menu
}

public void Response(string response) {
    switch (response)
    {
        case "C1": 
            Console.WriteLine("How much would you like to deposit to your checking account?");
            string depositEntry = Console.ReadLine();
            double checkingBalance = Convert.ToInt32(depositEntry) + currentCheckingBalance;
            currentCheckingBalance += checkingBalance;
            Console.WriteLine("Your current checking balance is " + checkingBalance + "\n (X) Exit, (M) Main Menu" );

            string selection = Console.ReadLine().ToUpper();
            if (selection == "X")
            {
                return;
            }
            else if (selection == "M")
            {
                ***JUMP***
                MainMenu();
                return;
            }
            else
            {
                Console.WriteLine("Your entry was invalid");
            }


            break;

        case "C2":      

            break;

        case "W1":
    }
}

---

与已经给出的答案类似，我建议将其打破。下面是一个例子：

Main

方法：

static void Main(string[] args) {
    string input = null;

    do {
        input = Console.ReadLine();
        ParseInput(input);
    } while (input != "X");
}

ParseInput

：

static void ParseInput(string input) {
    switch (input) {
        case "X": //from Main(), this will close the app
            return;
        case "M":
            MainMenu();
            break;
        case "C1":
            ShowAccount("C1"); //move your deposit/withdraw logic into a method and call with the selected account
            return;
        //other accounts
        default:
            break; //error message?
    }
}

和

主菜单

：

static void MainMenu() {
    Console.WriteLine("Select an option? \n VIEW BALANCE (B1) checking, (B2) saving \n DEPOSIT (C1) checking, (C2) saving \n WITHDRAW (W1) checking, (W2) saving");
}

这将允许您在循环中读取输入，

ParseInput

函数可以处理您的个别情况。您可能还想在开始时调用

main menu（）

，因此它会从头开始显示

它的工作原理如下：

从用户处获取输入

将输入传递到

ParseInput（）

，由其决定下一步的方向

在

ParseInput（）

中命中的任何函数都将执行，写入控制台或请求进一步输入

一旦该函数返回，

while（input！=“X”）

进行计算。如果

输入！=“X”

，转到1，否则退出

---

我建议您使用

goto

C#参考

static void Main()
{
    int x = 200, y = 4;
    int count = 0;
    string[,] array = new string[x, y];

    // Initialize the array:
    for (int i = 0; i < x; i++)

        for (int j = 0; j < y; j++)
            array[i, j] = (++count).ToString();

    // Read input:
    Console.Write("Enter the number to search for: ");

    // Input a string:
    string myNumber = Console.ReadLine();

    // Search:
    for (int i = 0; i < x; i++)
    {
        for (int j = 0; j < y; j++)
        {
            if (array[i, j].Equals(myNumber))
            {
                goto Found;
            }
        }
    }

    Console.WriteLine("The number {0} was not found.", myNumber);
    goto Finish;

    Found:
        Console.WriteLine("The number {0} is found.", myNumber);

    Finish:
        Console.WriteLine("End of search.");


    // Keep the console open in debug mode.
    Console.WriteLine("Press any key to exit.");
    Console.ReadKey();
}

static void Main（）
{
int x=200，y=4；
整数计数=0；
字符串[，]数组=新字符串[x，y]；
//初始化阵列：
对于（int i=0；i

输入44的输出为：

• 输入要搜索的号码：44
• 找到44号了
• 搜索结束

---

有关MSDN参考，请参阅。

使用跳转语句通常表示逻辑流混乱。如果有必要，我会尽量避免任何形式的跳跃。下面的代码打印出主菜单，如果用户键入“x”，程序将退出。如果用户选择其他选项之一，则只需打印一条消息，指示用户选择的内容。用户按下任意键后，控制台将清除，并重新显示主菜单

static void Main()
{
    int x = 200, y = 4;
    int count = 0;
    string[,] array = new string[x, y];

    // Initialize the array:
    for (int i = 0; i < x; i++)

        for (int j = 0; j < y; j++)
            array[i, j] = (++count).ToString();

    // Read input:
    Console.Write("Enter the number to search for: ");

    // Input a string:
    string myNumber = Console.ReadLine();

    // Search:
    for (int i = 0; i < x; i++)
    {
        for (int j = 0; j < y; j++)
        {
            if (array[i, j].Equals(myNumber))
            {
                goto Found;
            }
        }
    }

    Console.WriteLine("The number {0} was not found.", myNumber);
    goto Finish;

    Found:
        Console.WriteLine("The number {0} is found.", myNumber);

    Finish:
        Console.WriteLine("End of search.");


    // Keep the console open in debug mode.
    Console.WriteLine("Press any key to exit.");
    Console.ReadKey();
}

在主菜单中，如果用户未键入其中一个选项，则忽略该选项，清除控制台，并重新打印菜单。没有显示错误，表明选择无效

这不需要用户键入“m”返回主菜单。选择存款/取款/…方法完成后，代码将自动返回主菜单

我猜这可能就是你要找的。希望这有帮助

static void Main(string[] args) {

  string userInput = "";
  while ((userInput = GetMainSelection()) != "x") {
    switch (userInput) {
      case "c1":
        Console.WriteLine("C1 Deposit Checking method");
        break;
      case "c2":
        Console.WriteLine("C2 Deposit Savings method");
        break;
      case "b1":
        Console.WriteLine("B1 View Balance Checking method");
        break;
      case "b2":
        Console.WriteLine("B2 View Balance Savings method");
        break;
      case "w1":
        Console.WriteLine("W1 Withdraw Checking method");
        break;
      case "w2":
        Console.WriteLine("W2 withdraw Savings method");
        break;
    }
    Console.WriteLine("Press Any Key to continue"); // <-- show what method was just used
    Console.ReadKey();
    Console.Clear();
  }
  Console.Write("Press any key to exit the program");
  Console.ReadKey();
}

private static string GetMainSelection() {
  string userInput = "";
  while (true) {
    Console.WriteLine("Select an option? \n VIEW BALANCE (B1) checking, (B2) saving \n DEPOSIT (C1) checking, (C2) saving \n WITHDRAW (W1) checking, (W2) saving. (X) to EXit");
    userInput = Console.ReadLine().ToLower();
    if (userInput == "b1" || userInput == "b2" || userInput == "c1" || userInput == "c2" || userInput == "w1" || userInput == "w2" || userInput == "x") {
      return userInput;
    }
    else {
      Console.Clear();
    }
  }
}

static void Main（字符串[]args）{
字符串userInput=“”；
而（（userInput=GetMainSelection（））！=“x”）{
开关（用户输入）{
案例“c1”：
控制台写入线（“C1存款检查方法”）；
打破
案例“c2”：
控制台。WriteLine（“C2存款储蓄法”）；
打破
案例“b1”：
Console.WriteLine（“B1视图余额检查方法”）；
打破
案例“b2”：
Console.WriteLine（“B2视图余额节省方法”）；
打破
案例“w1”：
控制台写入线（“W1撤消检查方法”）；
打破
案例“w2”：
Console.WriteLine（“W2提取储蓄方法”）；
打破
}
Console.WriteLine（“按任意键继续”）；//为什么不干脆中断！我尝试了中断，它返回到if语句块的开头。我想返回到开头。非常感谢。以我目前的技能水平，非常清晰且易于解释。非常感谢你的建议！非常感谢你的建议！非常感谢你的建议！非常感谢你的建议！