1

我正在编写 ac# 控制台俄罗斯方块游戏。一旦我到达应用程序准备就绪的部分。我到了必须解决滞后的部分。我是这样写的：

static void writeCol(string a, ConsoleColor b)
        {
            ConsoleColor c = Console.ForegroundColor;
            Console.ForegroundColor = b;
            Console.Write(a);
            Console.ForegroundColor = c;
        }

所以当一个新的块来了/我想移动一些东西：

writeCol(blokk, ConsoleColor.Magenta);

blokk 在哪里：

private const string blokk = "█";

我找到了一种更快地“写入”控制台的方法：

using System;
using System.IO;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;

namespace ConsoleApplication1
{
  class Program
  {

    [DllImport("Kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    static extern SafeFileHandle CreateFile(
        string fileName,
        [MarshalAs(UnmanagedType.U4)] uint fileAccess,
        [MarshalAs(UnmanagedType.U4)] uint fileShare,
        IntPtr securityAttributes,
        [MarshalAs(UnmanagedType.U4)] FileMode creationDisposition,
        [MarshalAs(UnmanagedType.U4)] int flags,
        IntPtr template);

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern bool WriteConsoleOutput(
      SafeFileHandle hConsoleOutput, 
      CharInfo[] lpBuffer, 
      Coord dwBufferSize, 
      Coord dwBufferCoord, 
      ref SmallRect lpWriteRegion);

    [StructLayout(LayoutKind.Sequential)]
    public struct Coord
    {
      public short X;
      public short Y;

      public Coord(short X, short Y)
      {
        this.X = X;
        this.Y = Y;
      }
    };

    [StructLayout(LayoutKind.Explicit)]
    public struct CharUnion
    {
      [FieldOffset(0)] public char UnicodeChar;
      [FieldOffset(0)] public byte AsciiChar;
    }

    [StructLayout(LayoutKind.Explicit)]
    public struct CharInfo
    {
      [FieldOffset(0)] public CharUnion Char;
      [FieldOffset(2)] public short Attributes;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct SmallRect
    {
      public short Left;
      public short Top;
      public short Right;
      public short Bottom;
    }


    [STAThread]
    static void Main(string[] args)
    {
      SafeFileHandle h = CreateFile("CONOUT$", 0x40000000, 2, IntPtr.Zero, FileMode.Open, 0, IntPtr.Zero);

      if (!h.IsInvalid)
      {
        CharInfo[] buf = new CharInfo[80 * 25];
        SmallRect rect = new SmallRect() { Left = 0, Top = 0, Right = 80, Bottom = 25 };

        for (byte character = 65; character < 65 + 26; ++character)
        {
          for (short attribute = 0; attribute < 15; ++attribute)
          {
            for (int i = 0; i < buf.Length; ++i)
            {
              buf[i].Attributes = attribute;
              buf[i].Char.AsciiChar = character;
            }

            bool b = WriteConsoleOutput(h, buf,
              new Coord() { X = 80, Y = 25 },
              new Coord() { X = 0, Y = 0 },
              ref rect);
          }
        }
      }
      Console.ReadKey();
    }
  }
}

（此代码打印出 AZ 中的所有字符）。所以最后的问题是： 我如何修改这段代码以利用它？

提前致谢。祝你今天过得愉快。

编辑： 我找到了一种方法，但它给了我错误的文本。有任何想法吗？

 public static void Writetocol(string s)
            {
               var kiir = s;
            byte[] barr;
            kiir = Convert.ToString(kiir);
            barr = Encoding.ASCII.GetBytes(kiir);
            SafeFileHandle h = CreateFile("CONOUT$", 0x40000000, 2, IntPtr.Zero, FileMode.Open, 0, IntPtr.Zero);

            if (!h.IsInvalid)
            {
                CharInfo[] buf = new CharInfo[80 * 25];
                SmallRect rect = new SmallRect() { Left = 0, Top = 0, Right = 80, Bottom = 25 };
                for (short attribute = 0; attribute < 15; ++attribute)
                {
                    for (int i = 0; i < barr.Length; ++i)
                    {
                        buf[i].Attributes = attribute;
                        buf[i].Char.AsciiChar = barr[i];
                    }

                    bool b = WriteConsoleOutput(h, buf,
                      new Coord() { X = 80, Y = 25 },
                      new Coord() { X = 0, Y = 0 },
                      ref rect);
                }
            }
         }

它给了我这个： 1 什么时候应该给我这个： 2

（如果有人想知道，它是用匈牙利语写的）

4

1 回答 1

1

您可以通过处理自己的换行符和位置来解析您提供的字符串以填充缓冲区，如下所示：

    static void writeCol(string a, ConsoleColor b)
    {
        byte x = 0, y = 0;
        // parsing to make it  fly
        // fill the buffer with the string 
        for(int ci=0; ci<a.Length;ci++)
        {
            switch (a[ci])
            {
                case '\n': // newline char, move to next line, aka y=y+1
                    y++;
                    break;
                case '\r': // carriage return, aka back to start of line
                    x = 0;
                    break;
                case ' ': // a space, move the cursor to the right
                    x++;
                    break;
                default:
                    // calculate where we should be in the buffer
                    int i = y * 80 + x;
                    // color
                    buf[i].Attributes= (short) b;
                    // put the current char from the string in the buffer
                    buf[i].Char.AsciiChar = (byte) a[ci];
                    x++;
                    break;
            }
        }
        // we handled our string, let's write the whole screen at once
        bool success = WriteConsoleOutput(h, buf,
                     new Coord() { X = 80, Y = 25 },
                     new Coord() { X = 0, Y = 0 },
                     ref rect);
    }

h请注意，我已经将安全句柄和本机缓冲区重构为buf静态状态，因此我们在应用程序中只有一次：

static IntPtr h= GetStdHandle(STD_OUTPUT_HANDLE); 
static CharInfo[] buf = new CharInfo[80 * 25];
static SmallRect rect = new SmallRect() { Left = 0, Top = 0, Right = 80, Bottom = 25 };

我添加了GetStdHandle

    //http://www.pinvoke.net/default.aspx/kernel32/GetStdHandle.html
    const int STD_OUTPUT_HANDLE = -11;
    [DllImport("kernel32.dll", SetLastError = true)]
    static extern IntPtr GetStdHandle(int nStdHandle);

您需要将方法签名更改WriteConsoleOutput为接受 anIntPtr而不是SafeFileHandle在这种情况下。

我使用以下测试调用测试了此方法：

writeCol(@"

     TEST
     ======
     1 test

     FuBar", ConsoleColor.Blue);

这给出了这个结果：

在此处输入图像描述

所以请记住buf首先在正确的位置填充缓冲区，然后调用WriteConsoleOutput将缓冲区立即复制到屏幕上。如果你经常打电话给你，你又回到了原点......

请注意，您不需要编写整个屏幕。通过使用不同的矩形，您可以只写屏幕的一部分。

对于这个演示，我省略了所有的错误检查。这由你来检查。

您可能想阅读msdn 文档中使用的本机调用

于 2015-02-08T22:39:27.880 回答