我尝试了下面的代码…

string pass = "";
Console.Write("Enter your password: ");
ConsoleKeyInfo key;

do
{
    key = Console.ReadKey(true);

    // Backspace Should Not Work
    if (key.Key != ConsoleKey.Backspace)
    {
        pass += key.KeyChar;
        Console.Write("*");
    }
    else
    {
        Console.Write("\b");
    }
}
// Stops Receving Keys Once Enter is Pressed
while (key.Key != ConsoleKey.Enter);

Console.WriteLine();
Console.WriteLine("The Password You entered is : " + pass);

但是这样的话,退格键在输入密码时就不起作用了。 任何建议吗?


当前回答

如果我理解正确,你试图使退格删除屏幕上可见的*字符和缓存字符在你的传递变量?

如果是这样,那么只需将你的else块更改为:

            else
            {
                Console.Write("\b");
                pass = pass.Remove(pass.Length -1);
            }

其他回答

控制台。写(“b \ b \”);将从屏幕上删除星号字符,但在else块中没有任何代码可以从传递字符串变量中删除先前输入的字符。

这里是相关的工作代码,应该做你需要的:

var pass = string.Empty;
ConsoleKey key;
do
{
    var keyInfo = Console.ReadKey(intercept: true);
    key = keyInfo.Key;

    if (key == ConsoleKey.Backspace && pass.Length > 0)
    {
        Console.Write("\b \b");
        pass = pass[0..^1];
    }
    else if (!char.IsControl(keyInfo.KeyChar))
    {
        Console.Write("*");
        pass += keyInfo.KeyChar;
    }
} while (key != ConsoleKey.Enter);

为此,您应该使用System.Security.SecureString

public SecureString GetPassword()
{
    var pwd = new SecureString();
    while (true)
    {
        ConsoleKeyInfo i = Console.ReadKey(true);
        if (i.Key == ConsoleKey.Enter)
        {
            break;
        }
        else if (i.Key == ConsoleKey.Backspace)
        {
            if (pwd.Length > 0)
            {
                pwd.RemoveAt(pwd.Length - 1);
                Console.Write("\b \b");
            }
        }
        else if (i.KeyChar != '\u0000' ) // KeyChar == '\u0000' if the key pressed does not correspond to a printable character, e.g. F1, Pause-Break, etc
        {
            pwd.AppendChar(i.KeyChar);
            Console.Write("*");
        }
    }
    return pwd;
}
 string pass = "";
 Console.WriteLine("Enter your password: ");
 ConsoleKeyInfo key;

 do {
  key = Console.ReadKey(true);

  if (key.Key != ConsoleKey.Backspace) {
   pass += key.KeyChar;
   Console.Write("*");
  } else {
   Console.Write("\b \b");
   char[] pas = pass.ToCharArray();
   string temp = "";
   for (int i = 0; i < pass.Length - 1; i++) {
    temp += pas[i];
   }
   pass = temp;
  }
 }
 // Stops Receving Keys Once Enter is Pressed
 while (key.Key != ConsoleKey.Enter);

 Console.WriteLine();
 Console.WriteLine("The Password You entered is : " + pass);

您可以将键附加到一个累加链表中。

当接收到退格键时,从列表中删除最后一个键。

当您接收到enter键时,将列表折叠成字符串并执行其余工作。

如果我理解正确,你试图使退格删除屏幕上可见的*字符和缓存字符在你的传递变量?

如果是这样,那么只需将你的else块更改为:

            else
            {
                Console.Write("\b");
                pass = pass.Remove(pass.Length -1);
            }