在数组中应用验证

private static bool GetNumberFromConsole()
    {
        bool isValid = false;
        int input = -1;
        while (!isValid)
            if (int.TryParse(Console.ReadLine(), out input))
                isValid = true;
            else
                Console.WriteLine("not a number");
        Console.WriteLine("number entered:" + input);
        return isValid;
}

请注意，这段代码可能会使用大量的压缩和泛化，但这是一个想法，您可以使用int.tryparse():

 public void calculate_Tickets()
    {
        int adult = adult_Tickets();
        int child = child_Tickets();
        ticket_Prices(adult, child);
    }
    private int adult_Tickets()
    {
        Console.Write("Please enter the number of tickets sold for Adult:(100 for exit)");
        int adultTickets = 0;
        if (int.TryParse(Console.ReadLine(),out adultTickets)){
            if (adultTickets == 100)
            {
                Console.WriteLine("Good Bye");
                Environment.Exit(0);
            }
            else
            {
                Console.WriteLine("you may only inter numbers");
                adult_Tickets();
            }
        }
        return adultTickets;
    }
    private int child_Tickets() {
        Console.Write("Please enter the number of tickets sold for child:(100 for exit)");
        int childTickets = 0;
        if (int.TryParse((Console.ReadLine(), out childTickets)){
            if (childTickets == 100)
            {
                Console.WriteLine("Good Bye");
                Environment.Exit(0);
            }
        } else
        {
            Console.WriteLine("you may only inter numbers");
            child_Tickets();
        }
        return childTickets;
    }
    private void ticket_Prices(int adultTickets, int childTickets) {
        int[] arrAmt = new int[] { 30, 20 };
        int[] tickets = new int[] { adultTickets, childTickets };
        int totalCost = 0;
        if (tickets[0] >= 5 && tickets[0] <= 30)
        {
            totalCost += tickets[0] * arrAmt[0];
            Console.Write("The sale amount of tickets for Adult: ${0} 'n", (arrAmt[0] * tickets[0]));
        }
        else
        {
            Console.Write("Not Valid 'n");
        }
        if (tickets[1] >= 5 && tickets[1] <= 30)
        {
            totalCost += tickets[1] * arrAmt[1];
            Console.Write("The sale amount of tickets for child: ${0} 'n", (arrAmt[1] * tickets[1]));
        }
        Console.WriteLine("The total sale amount: {0}", totalCost);
    }

在一个方法中(同样需要大量优化-这是试图尽可能接近原始代码):

private void doTickets()
    {
        AdultTix:
        Console.Write("Please enter the number of tickets sold for Adult:(100 for exit)");
        int adultTickets = 0;
        while (!int.TryParse(Console.ReadLine(), out adultTickets))
        {
            Console.WriteLine("You may only enter numbers");
            Console.ReadLine();
            if (int.TryParse(Console.ReadLine(), out adultTickets))
            {
                break;
            }
        }
        if (adultTickets == 100)
        {
            Console.WriteLine("Good Bye");
            Environment.Exit(0);
        }
        if (adultTickets > 0 && (adultTickets < 5 || adultTickets > 30))
        {
            Console.WriteLine("You may only purchase between 5 and 30 adult tickets. You tried to purchase " + adultTickets.ToString() + ". Please try again.");
            goto AdultTix;
        }
        ChildTix:
        Console.Write("Please enter the number of tickets sold for Child:(100 for exit)");
        int childTickets = 0;
        while (!int.TryParse(Console.ReadLine(), out childTickets))
        {
            Console.WriteLine("You may only enter numbers");
            Console.ReadLine();
            if (int.TryParse(Console.ReadLine(), out childTickets))
            {
                break;
            }
        }
        if (childTickets == 100)
        {
            Console.WriteLine("Good Bye");
            Environment.Exit(0);
        }
        if (childTickets > 0 && (childTickets < 5 || childTickets > 30))
        {
            Console.WriteLine("You may only purchase between 5 and 30 child tickets. You tried to purchase " + childTickets.ToString() + ". Please try again.");
            goto ChildTix;
        }

        int[] arrAmt = new int[] { 30, 20 };
        int[] tickets = new int[] { adultTickets, childTickets };
        int totalCost = 0;

        totalCost += tickets[0] * arrAmt[0];
        Console.Write("The sale amount of tickets for Adult: ${0} 'n", (arrAmt[0] * tickets[0]));


        totalCost += tickets[1] * arrAmt[1];
        Console.Write("The sale amount of tickets for child: ${0} 'n", (arrAmt[1] * tickets[1]));

        Console.WriteLine("The total sale amount: {0}", totalCost);
    }