请教一个关于esc键的问题

Question

我在(c#）dos窗口下编一个输出三角形的程序。通过consolekey获取键值来判定是否为esc键并退出，通过console.readline()获取要打印的三角形行数。  但这样输入数字的时候需要按两次(consolekey 和readline)--比如输入行数3，需要将3键按两次，怎么解决比较好?
部分代码如下
...
if ((key = Console.ReadKey(true).Key) != ConsoleKey.Escape)
                //判断用户是否按下esc键，不是则继续
{
                    try
                    {
                        lines = int.Parse(console.readline());
                    }
                    catch
                    {                        Console.WriteLine("请输入正确的整数值!");
                        continue;
                    }
.........能用readkey获取输入的数值吗？但这个只能接收单一键值，而且我调试时输入3的时候，console.write()输出的是D3而不是3.

Answer 1

你用if的话就需要输入2次，第一次被if()的条件捕获，第2次才会被lines = int.Parse(console.readline()); 捕获
用while来判断每次输入的值，

Answer 2

貌似不行，跟条件判断语句没关系，console.readline()和Console.ReadKey()会导致两次获取

Answer 3

bool state = true;
            List<string> list = new List<string>();
            while (state)
            {
                ConsoleKeyInfo keyinfo = Console.ReadKey();
                if (keyinfo.Key == ConsoleKey.Escape)
                {
                    state = false;
                }
                else
                {
                    if (keyinfo.Key == ConsoleKey.Enter)
                    {
                    }
                    else
                    {
                        list.Add(keyinfo.Key.ToString());
                    }
                }
            }

Answer 4

using System;
using System.Collections.Generic;
namespace gets
{
class class2
    {
            static void Main()
        {
                bool state = true;
                string b=string.Empty;
                List<string> list = new List<string>();
                while (state)
                {
                    ConsoleKeyInfo keyinfo = Console.ReadKey();
                    if (keyinfo.Key == ConsoleKey.Escape)
                    {
                        state = false;
                        break;
                    }
                    else
                    {
                        if (keyinfo.Key == ConsoleKey.Enter)
                        {
                            Console.WriteLine("");
                            break;
                        }
                        else
                        {
                            list.Add(keyinfo.Key.ToString());
                           
                        }
                    }
                }
                foreach (string n in list)
                {
                    b=b+n;
                }
                Console.WriteLine(b);             }        
    }
}比如上面的程序，你输入23，得到的b值的输出是D2D3