（C＃）我正在开发一个类似于RedBox的程序，该程序将具有客户和经理功能。在开始实现更多功能之前，我只是试图使所有菜单正常工作，但是遇到一个我似乎无法理解的错误。我的问题似乎在CustomerMenu（）方法和MainMenu（）方法中。我已经添加了所有内容，因此您可以获得完整图片。感谢您提供任何帮助，因为我仍然有些陌生，因此感谢您提供任何提示，谢谢。
MainMenu();
Console.ReadKey();
}
static void MainMenu()
{
int userChoice = MainMenuChoice(); // Reading in the userChoice with the MenuChoice method
if (userChoice == 3) // if user enters 3, the program ends
{
Console.WriteLine("Thank you, Goodbye!");
}
while (userChoice != 3)
{
if (userChoice == 1)
{
Console.WriteLine("Welcome to the customer menu!\n"); // The customer menu is brought up if user enters 1
CustomerMenu();
}
if (userChoice == 2)
{
Console.WriteLine("Welcome to the manager menu!\n"); // The manager menu is brought up if user enters 2
//ManagerMenu();
}
userChoice = MainMenuChoice(); // program ends
if (userChoice == 3)
{
Console.WriteLine("Thank you for visiting VideoMart at University Boulevard, Goodbye!");
}
}
}
static int MainMenuChoice()
{
Console.WriteLine("-----------------------------------------------------------------------------------------------------------"); // introducing the user with the menu
Console.WriteLine("Welcome to VideoMart at University Boulevard! \nAt VideoMart you are able to rent a variety of movies from many genres such as action, family, horror, etc!");
Console.WriteLine("\nPress 1 if you are a customer");
Console.WriteLine("\nPress 2 if you are a manager");
Console.WriteLine("\nPress 3 to Exit");
Console.WriteLine("-----------------------------------------------------------------------------------------------------------");
string choice = Console.ReadLine();
Console.WriteLine();
while (!(choice == "1" || choice == "2" || choice == "3")) // error checking
{
Console.WriteLine("Please try again");
Console.WriteLine("Press 1 if you are a customer");
Console.WriteLine("Press 2 if you are a manager");
Console.WriteLine("Press 3 to Exit");
choice = Console.ReadLine();
}
return int.Parse(choice);
}
}
static void CustomerMenu() {
int customerChoice = CustomerMenuChoice(); // Reading in the customerChoice into the CustomerMenuChoice method
if (customerChoice == 5) // if user enters 5, the program ends
{
Console.WriteLine("Thank you for using VideoMart!");
}
while (customerChoice != 5)
{
if (customerChoice == 1)
{
Console.WriteLine("Press 1 to view movies available to rent.\n"); // this option gives the user the opportunity to view all movies available to rent
//MoviesAvailable();
}
if (customerChoice == 2)
{
Console.WriteLine("Press 2 to rent a movie.\n"); // this option gives the user the opportunity to rent a movie, with email address
//RentMovie();
}
if (customerChoice == 3)
{
Console.WriteLine("Press 3 to view a list of movies you currently have rented.\n"); // this option gives the user the opportunity to view movies a user currently has rented, with email address
//RentMovie();
}
if (customerChoice == 4)
{
Console.WriteLine("Press 4 to return a movie rented.\n"); // this option gives the user the opportunity to return a movie rented
//RentMovie();
}
customerChoice = CustomerMenuChoice();
if (customerChoice == 5)
{
Console.WriteLine("Thank you for visiting VideoMart at University Boulevard, Goodbye!");
}
}
}
static int CustomerMenuChoice()
{
Console.WriteLine("-----------------------------------------------------------------------------------------------------------"); // introducing the user with the menu
Console.WriteLine("Welcome to VideoMart at University Boulevard! \nBelow is a list of actions that can be performed by customers!");
Console.WriteLine("\nPress 1 to view movies available to rent.");
Console.WriteLine("\nPress 2 to rent a movie.");
Console.WriteLine("\nPress 3 to view a list of movies you currently have rented.");
Console.WriteLine("\nPress 4 to return a movie rented.");
Console.WriteLine("\nPress 5 to exit.");
Console.WriteLine("-----------------------------------------------------------------------------------------------------------");
string customerChoice2 = Console.ReadLine();
Console.WriteLine();
while (!(customerChoice2 == "1" || customerChoice2 == "2" || customerChoice2 == "3" || customerChoice2 == "4") || customerChoice2 == "5") // error checking
{
Console.WriteLine("\nPress 1 to view movies available to rent.");
Console.WriteLine("\nPress 2 to rent a movie.");
Console.WriteLine("\nPress 3 to view a list of movies you currently have rented.");
Console.WriteLine("\nPress 4 to return a movie rented.");
Console.WriteLine("\nPress 5 to exit.");
customerChoice2 = Console.ReadLine();
}
return int.Parse(customerChoice2);
}
}
您可以尝试对此进行更正和重构。
我们创建了一种获取用户选择的方法，因此不再需要重复代码。我们使用uint是因为choice是肯定的，而TryParse可以转换输入的字符串。如果发生错误，它将返回0，所以在这里很好。
此外，我们也使用lamda来打印选择字符串以免重复。
接下来，我们使用开关来管理选择，以便代码更清晰和可维护。
在菜单之间清除了控制台，我们提供了根菜单和子菜单之间的导航。
未来的改进是通过运行这些表的自动菜单管理器来创建菜单标题，选项和相关方法的表。只是稍微复杂一点而不会太多。可以通过创建一些集合和MenuManager类来完成。有了这样的东西，您将拥有一个健壮的系统，该系统具有很少的代码，并且不再重复。让我知道您是否有兴趣。
static void Test()
{
MainMenu();
}
static uint GetUserChoice(Action printMenu, int choiceMax)
{
uint choice = 0;
Action getInput = () =>
{
uint.TryParse(Console.ReadLine(), out choice);
};
getInput();
Console.WriteLine();
while ( choice < 1 || choice > choiceMax )
{
Console.WriteLine();
Console.WriteLine("Please try again");
printMenu();
getInput();
}
return choice;
}
static void MainMenu()
{
Action printMenu = () =>
{
Console.WriteLine("Press 1 if you are a customer");
Console.WriteLine("Press 2 if you are a manager");
Console.WriteLine("Press 3 to Exit");
};
Console.Clear();
Console.WriteLine("-----------------------------------------------------------------------------------------------------------"); // introducing the user with the menu
Console.WriteLine("Welcome to VideoMart at University Boulevard!");
Console.WriteLine("At VideoMart you are able to rent a variety of movies from many genres such as action, family, horror, etc!");
Console.WriteLine();
printMenu();
Console.WriteLine("-----------------------------------------------------------------------------------------------------------");
uint choice = GetUserChoice(printMenu, 3);
switch ( choice )
{
case 1:
CustomerMenu();
break;
case 2:
//ManagerMenu();
break;
case 3:
Console.WriteLine("Thank you for visiting VideoMart at University Boulevard, Goodbye!");
break;
default:
throw new NotImplementedException();
}
}
static void CustomerMenu()
{
Action printMenu = () =>
{
Console.WriteLine("Press 1 to view movies available to rent.");
Console.WriteLine("Press 2 to rent a movie.");
Console.WriteLine("Press 3 to view a list of movies you currently have rented.");
Console.WriteLine("Press 4 to return a movie rented.");
Console.WriteLine("Press 5 to return to main menu.");
};
Console.Clear();
Console.WriteLine("-----------------------------------------------------------------------------------------------------------"); // introducing the user with the menu
Console.WriteLine("Below is a list of actions that can be performed by customers!");
Console.WriteLine();
printMenu();
Console.WriteLine("-----------------------------------------------------------------------------------------------------------");
Console.WriteLine();
uint choice = GetUserChoice(printMenu, 5);
switch ( choice )
{
case 1:
//MoviesAvailable();
break;
case 2:
//RentMovie();
break;
case 3:
//RentedMovies();
break;
case 4:
//ReturnMovie();
break;
case 5:
MainMenu();
break;
default:
throw new NotImplementedException();
}
}