可以在c＃.net控制台中暂停，缓存，刷新键盘输入吗？

Question

我想知道是否可以暂停，然后在c＃.net控制台中缓存和刷新键盘输入。例如，假设我创建了一个线程来设置控制台光标位置，写入字符以绘制进度条的板（ANSI字符），并且随着后台任务完成更改的百分比，线程再次更改光标位置以添加进度条中的另一个条，光标变回原始位置。在发生这种情况的同时，我想要原始线程来处理Console.ReadLine（）;我想知道是否有我可以暂停，然后缓存，刷新键盘输入，或者是否有一种方法来支持双向输入输出而没有副作用。这是一个例子：你会注意到，如果按住键，它会中断。

public void DrawScreenBackground()
{
    List<ConsoleColor> ColourArray = new List<ConsoleColor>();
    //ColourArray.Add(ConsoleColor.Black);
    ColourArray.Add(ConsoleColor.DarkGray);
    ColourArray.Add(ConsoleColor.DarkGreen);
    ColourArray.Add(ConsoleColor.Green);
    ColourArray.Add(ConsoleColor.Green);
    ColourArray.Add(ConsoleColor.DarkGreen);
    ColourArray.Add(ConsoleColor.DarkGray);

    int minProgress = 0;
    int maxProgress = 20;
    int currentProgress = minProgress;
    bool reverse = false;
    while (1 == 1)
    {
        if (!reverse)
        {
            if (currentProgress == maxProgress)
                reverse = !reverse;
            else
                currentProgress += 1;
        }
        else
        {
            if (currentProgress == minProgress)
                reverse = !reverse;
            else
                currentProgress -= 1;
        }
        //draw/////
        int curLeft = Console.CursorLeft;
        int curTop = Console.CursorTop;
        ConsoleColor defaultColor = Console.ForegroundColor;
        ConsoleColor item = ColourArray[0];
        ColourArray.RemoveAt(0);
        ColourArray.Insert(ColourArray.Count-1, item);
        DrawDoubleBorder(9, 9, 21, 2);
        Console.ForegroundColor = item;
        Console.SetCursorPosition(10, 10);
        for (int i = 0; i < maxProgress - minProgress; i += 1)
            Console.Write(" ");
        Console.SetCursorPosition(10, 10);
        for (int i = 0; i < currentProgress - minProgress; i += 1)
            Console.Write("#");
        Console.ForegroundColor = defaultColor;
        Console.SetCursorPosition(curLeft, curTop);
        ///////////
        Thread.Sleep(125);
    }
}
private void DrawDoubleBorder(int x, int y, int width, int height)
{
    Console.SetCursorPosition(x, y);
    int currentX = x;
    int currentY = y;
    for (int h = 0; h <= height; h += 1)
    {
        for (int w = 0; w <= width; w += 1)
        {
            if (w == 0 && h == 0)
                Console.Write(ConsoleChars.DoubleBorderTopLeft);
            else if (w == width && h == height)
                Console.Write(ConsoleChars.DoubleBorderBottomRight);
            else if (w == width && h == 0)
                Console.Write(ConsoleChars.DoubleBorderTopRight);
            else if (w == 0 && h == height)
                Console.Write(ConsoleChars.DoubleBorderBottomLeft);
            else if (w == 0 || w == width)
                Console.Write(ConsoleChars.DoubleBorderVerticle);
            else if (h == 0 || h == height)
                Console.Write(ConsoleChars.DoubleBorderHorizontal);
            else
                Console.Write(" ");
        }
        currentY += 1;
        Console.SetCursorPosition(currentX, currentY);
    }
}
public struct ConsoleChars
{
    public static char DoubleBorderHorizontal = (char)205;
    public static char DoubleBorderVerticle = (char)186;
    public static char DoubleBorderBottomLeft = (char)200;
    public static char DoubleBorderTopRight = (char)187;
    public static char DoubleBorderBottomRight = (char)188;
    public static char DoubleBorderFourWaySplit = (char)206;
    public static char DoubleBorderTopLeft = (char)201;
    public static char DoubleBorderLeftThreeWaySplit = (char)204;
    public static char DoubleBorderRightThreeWaySplit = (char)185;
}

        Thread thread = new Thread(new ThreadStart(DrawScreenBackground));
        thread.Start();
        Console.ReadLine();

编辑：解决方案=

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace ConsoleApplication1
{
    public class Program
    {
        static void Main(string[] args)
        {
            Console.OutputEncoding = System.Text.Encoding.GetEncoding(1252);
            Thread thread = new Thread(new ParameterizedThreadStart(DrawScreenBackground));
            object locker = new object();
            thread.Start(locker);
            string input = string.Empty;
            while(!input.Contains("\r\n"))
            {
                string temp = FlushKeyBoardInput();
                if(temp!=string.Empty)
                {
                    lock(locker)
                    {
                        Console.Write(temp);
                        input+=temp;
                    }
                }
            }
        }

        public static string FlushKeyBoardInput()
        {
            string output = string.Empty;
            while (Console.KeyAvailable)
            {
                ConsoleKeyInfo key = Console.ReadKey(true);
                output += key.KeyChar;
            }
            return output;
        }

        public static void DrawScreenBackground(object locker)
        {
            List<ConsoleColor> ColourArray = new List<ConsoleColor>();
            //ColourArray.Add(ConsoleColor.Black);
            ColourArray.Add(ConsoleColor.DarkGray);
            ColourArray.Add(ConsoleColor.DarkGreen);
            ColourArray.Add(ConsoleColor.Green);
            ColourArray.Add(ConsoleColor.Green);
            ColourArray.Add(ConsoleColor.DarkGreen);
            ColourArray.Add(ConsoleColor.DarkGray);

            int minProgress = 0;
            int maxProgress = 20;
            int currentProgress = minProgress;
            bool reverse = false;
            while (1 == 1)
            {
                if (!reverse)
                {
                    if (currentProgress == maxProgress)
                        reverse = !reverse;
                    else
                        currentProgress += 1;
                }
                else
                {
                    if (currentProgress == minProgress)
                        reverse = !reverse;
                    else
                        currentProgress -= 1;
                }
                //draw/////
                lock (locker)
                {
                    int curLeft = Console.CursorLeft;
                    int curTop = Console.CursorTop;
                    ConsoleColor defaultColor = Console.ForegroundColor;
                    ConsoleColor item = ColourArray[0];
                    ColourArray.RemoveAt(0);
                    ColourArray.Insert(ColourArray.Count - 1, item);
                    DrawDoubleBorder(9, 9, 21, 2);
                    Console.ForegroundColor = item;
                    Console.SetCursorPosition(10, 10);
                    for (int i = 0; i < maxProgress - minProgress; i += 1)
                        Console.Write(" ");
                    Console.SetCursorPosition(10, 10);
                    for (int i = 0; i < currentProgress - minProgress; i += 1)
                        Console.Write("#");
                    Console.ForegroundColor = defaultColor;
                    Console.SetCursorPosition(curLeft, curTop);
                    ///////////
                }
                Thread.Sleep(50);
            }
        }
        public static void DrawDoubleBorder(int x, int y, int width, int height)
        {
            Console.SetCursorPosition(x, y);
            int currentX = x;
            int currentY = y;
            for (int h = 0; h <= height; h += 1)
            {
                for (int w = 0; w <= width; w += 1)
                {
                    if (w == 0 && h == 0)
                        Console.Write(ConsoleChars.DoubleBorderTopLeft);
                    else if (w == width && h == height)
                        Console.Write(ConsoleChars.DoubleBorderBottomRight);
                    else if (w == width && h == 0)
                        Console.Write(ConsoleChars.DoubleBorderTopRight);
                    else if (w == 0 && h == height)
                        Console.Write(ConsoleChars.DoubleBorderBottomLeft);
                    else if (w == 0 || w == width)
                        Console.Write(ConsoleChars.DoubleBorderVerticle);
                    else if (h == 0 || h == height)
                        Console.Write(ConsoleChars.DoubleBorderHorizontal);
                    else
                        Console.Write(" ");
                }
                currentY += 1;
                Console.SetCursorPosition(currentX, currentY);
            }
        }
        public struct ConsoleChars
        {
            public static char DoubleBorderHorizontal = (char)205;
            public static char DoubleBorderVerticle = (char)186;
            public static char DoubleBorderBottomLeft = (char)200;
            public static char DoubleBorderTopRight = (char)187;
            public static char DoubleBorderBottomRight = (char)188;
            public static char DoubleBorderFourWaySplit = (char)206;
            public static char DoubleBorderTopLeft = (char)201;
            public static char DoubleBorderLeftThreeWaySplit = (char)204;
            public static char DoubleBorderRightThreeWaySplit = (char)185;
        }
    }
}

注意：不支持退格键，最好自己绘制光标

Answer 1

请勿使用Console.ReadLine()或Console.Read()。相反，请查看Console.ReadKey()和Console.KeyAvailable()

刷新键盘队列非常简单：

public void FlushKeyBoardInput()
{
  while ( Console.KeyAvailable )
  {
    ConsoleKeyInfo key = Console.ReadKey() ;
  }
}

Console.ReadKey()甚至有一个过载，可让您控制是否将键回显到屏幕。

就暂停或缓存键盘输入而言，命令shell本身具有一定数量的键盘缓冲区，但是您需要将按键刷入队列而不将它们作为缓存回显到屏幕并将输入方法写入在从实际键盘拉出之前从缓存中读取。