密码屏蔽控制台应用程序

一尘不染

密码屏蔽控制台应用程序

我尝试了以下代码…

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);

但是这种方式在输入密码时不能使用退格功能。有什么建议吗？

阅读 203

2020-05-19

共1个答案

一尘不染

Console.Write("\b \b");将从屏幕上删除星号字符，但是您的else块中没有任何代码可从pass字符串变量中删除先前输入的字符。

以下是应满足您要求的相关工作代码：

string pass = "";
do
{
    ConsoleKeyInfo key = Console.ReadKey(true);
    // Backspace Should Not Work
    if (key.Key != ConsoleKey.Backspace && key.Key != ConsoleKey.Enter)
    {
        pass += key.KeyChar;
        Console.Write("*");
    }
    else
    {
        if (key.Key == ConsoleKey.Backspace && pass.Length > 0)
        {
            pass = pass.Substring(0, (pass.Length - 1));
            Console.Write("\b \b");
        }
        else if(key.Key == ConsoleKey.Enter)
        {
            break;
        }
    }
} while (true);

2020-05-19