c# 通过win32 api 得到指定Console application Content

已知的问题：
　
   1. Windows 应用程序才可以使用,可以用非windows应用程序包一层

 public class ConsoleContentRead
    {
        [DllImport("kernel32.dll", SetLastError = true)]
        static extern bool AttachConsole(uint dwProcessId);

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern bool FreeConsole(uint dwProcessId);

        [DllImport("kernel32.dll", SetLastError = true)]
        static extern IntPtr GetStdHandle(int nStdHandle);

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

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        static extern bool ReadConsoleOutputCharacter(IntPtr hConsoleOutput, [Out] StringBuilder lpCharacter, uint length, Coord bufferCoord, out uint lpNumberOfCharactersRead);

        public static string ReadCharacterAt(int x, int y, int length)
        {
            IntPtr consoleHandle = GetStdHandle(-11);

            if (consoleHandle == IntPtr.Zero)
            {
                return null;
            }
            Coord position = new Coord
            {
                X = (short)x,
                Y = (short)y
            };
            StringBuilder result = new StringBuilder(length);
            uint read = 0;
            if (ReadConsoleOutputCharacter(consoleHandle, result, (uint)length, position, out read))
            {
                return result.ToString();
            }
            else
            {
                return null;
            }
        }



        public static string GetContent(int pid, int x, int y, int length)
        {
            //注意要是 Windows 应用程序才可以 AttachConsole成功
            var flag = AttachConsole((uint)pid);
            string content = ReadCharacterAt(x, y, length);
            var freeflag = FreeConsole((uint)pid);
            return content;
        }
    }

 

//使用
   var content = ConsoleContentRead.GetContent(process.Id, 0, 2, 45);