Question

我不知道为什么我会收到以下错误：

控件不能从一个案例标签（'case“h”：'）转到另一个案例标签（CS0163）

仅适用于H和S - 非常奇怪。

switch(myChoice)
{
    case "K":
    case "k":
        Console.WriteLine("You have chosen the Kanto region");
        break;
    case "O":
    case "o":
        Console.WriteLine("You have chosen the Orange Islands");
        break;
    case "J":
    case "j":
        Console.WriteLine("You have chosen the Johto region");
        break;
    case "H":
    case "h":
        Console.WriteLine("You have chosen the Hoenn region");
    case "S":
    case "s":
        Console.WriteLine("You have chosen the Sinoh region");
    case "U":
    case "u":
        Console.WriteLine("You have chosen the Unova region");
        break;
    case "R":
    case "r":
        Console.WriteLine("Return");
        break;
    default:
        Console.WriteLine("{0} is not a valid choice", myChoice);
        break;
}

Answer 1

Fallthrough仅在case语句没有正文时才有效。由于您的“h”和“s”案例中存在代码，因此您需要break。

此外，作为建议：您可以在String.ToUpper()参数上执行switch，这样就可以避免检查myChoice的小写和大写变体。您的switch语句将变为：

switch(myChoice.ToUpper())
{
    case "K":
        Console.WriteLine("You have chosen the Kanto region");
        break;
    case "O":
        ...
}

Answer 2

在s和h案例之后你错过了break

Answer 3

您错过了break; - 来自switch语句的文档"Unlike C++, C# does not allow execution to continue from one switch section to the next."

Answer 4

你忘记了H和S之间的中断声明。

Answer 5

你错过了

break;

...声明

case "H":
case "h":
     Console.WriteLine("You have chosen the Hoenn region");
     break;
case "S":
case "s":
     Console.WriteLine("You have chosen the Sinoh region");
break;

Answer 6

案例＆＃34; H＆＃34;添加转到案例＆＃34; h＆＃34; 案例＆＃34; S＆＃34;添加转到案例＆＃34; s＆＃34;

case "H":
    goto case "h";
case "h":
    Console.WriteLine("You have chosen the Hoenn region");
    break;
case "S":
    goto case "s";
case "s":
     Console.WriteLine("You have chosen the Sinoh region");
break;

是的，随着C＃goto的回归！

C＃开关通过错误？

6 个答案: