c# - 检查用户输入是否在我的数组中

Question

我想检查用户输入是否在我的数组中。如果不是，则应写入“无效输入”。线阅读已经工作。我只想检查一下。但是就像我做的那样，它不起作用。听说要用for循环。但是如何呢？

[...]
char[] menuChars = { 'e', 'E', 'l', 'L', 'k', 'K', 't', 'T', 's', 'S', 'b', 'B' };

if (userKeyPress == !menuChars)
        {
          Console.WriteLine("Please insert a valid char: ");
        }
Console.ReadLine()
[...]

Answer 1

我宁愿将集合类型从数组改为HashSet<Char> :

  HashSet<Char> menuChars = new HashSet<Char>() {
    'e', 'E', 'l', 'L', 'k', 'K', 't', 'T', 's', 'S', 'b', 'B'
  };

  ...

  Char userKeyPress;

  // and condition check from "if" to "do..while" 
  // in order to repeat asking user until valid character has been provided
  do {
    Console.WriteLine("Please insert a valid char: ");
    // Or this:
    // userKeyPress = Console.Read();
    userKeyPress = Console.ReadKey().KeyChar;
  }
  while (!menuChars.Contains(userKeyPress));