支持退格的把输入的符号变成*号的程序怎么写?

Question

新人求教

Answer 1

TextBox?
textBox1.PasswordChar='*';ortextBox1.UseSystemPasswordChar=true;

Answer 2

using System;
using System.Collections.Generic;
using System.Text;namespace ConsoleApplication4
{    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(getPassword());
        }   
        public static   String getPassword()
        {
            String result = "";
            ConsoleKeyInfo info = Console.ReadKey(true);
            while (info.KeyChar != '\r')
            {
                if ((info.KeyChar >= '0' && info.KeyChar <= '9') || (info.KeyChar >= 'a' && info.KeyChar <= 'z')
                    || (info.KeyChar >= 'A' && info.KeyChar <= 'Z'))
                {
                    Console.Write("*");
                    result += info.KeyChar;
                }
                info = Console.ReadKey(true);
            }
            return result;
        }     }
}

Answer 3

using System;
using System.Collections.Generic;
using System.Text;namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            char cPassword;    //登陆时要用的密码 
            StringBuilder cPass = new StringBuilder();//关键方法 
            Console.Write("请输入密码：");
            cPassword = Console.ReadKey(true).KeyChar;//输入字符可以让他不显示出来 
            while (cPassword != '\r')//回车 
            {
                if (cPassword == '\b')//退格 
                {
                    if (cPass.Length == 0)
                    {
                        cPassword = (char)Console.ReadKey(true).KeyChar;//输入字符可以让他不显示出来 
                    }
                    else
                    {
                        cPass.Remove(cPass.Length - 1, 1);
                        Console.SetCursorPosition(12 + cPass.Length, 0);//光标定位    根据光标位置自己改动  x,y坐标 
                        Console.Write(" ");
                        Console.SetCursorPosition(12 + cPass.Length, 0);//光标定位    根据光标位置自己改动 
                        cPassword = (char)Console.ReadKey(true).KeyChar;
                    }
                }
                else
                {
                    cPass.Append(cPassword);
                    Console.Write('*');
                    cPassword = (char)Console.ReadKey(true).KeyChar;
                }
            }
            string cPassword2 = cPass.ToString();//密码    字符转换成String形式 
            Console.WriteLine(cPassword2);//测试验证你的密码 
            Console.ReadLine();
        }
    }
} //退格的