【.NET进程通信】初探.NET中进程间通信的简单的实现

转载请注明出处：http://blog.csdn.net/xiaoy_h/article/details/26090277

废话不多说，IPC就是进程间通信。

进程间通信能够採用的方法非常多，比方创建port后採用组播技术进行握手连接，这里要讲到的就是通过内存文件映射的方法实现。

先在项目中加入相关API函数：

        [DllImport("kernel32.dll", EntryPoint = "OpenFileMapping", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern IntPtr OpenFileMapping(uint dwDesiredAccess, bool bInheritHandle, String lpName);
        [DllImport("Kernel32.dll")]
        private static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject, uint dwDesiredAccess, uint dwFileOffsetHigh, uint dwFileOffsetLow, uint dwNumberOfBytesToMap);
        [DllImport("Kernel32.dll", EntryPoint = "UnmapViewOfFile", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern bool UnmapViewOfFile(IntPtr lpBaseAddress);
        [DllImport("kernel32.dll", EntryPoint = "CloseHandle", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern bool CloseHandle(IntPtr hHandle);
        [DllImport("Kernel32.dll", EntryPoint = "CreateFileMapping", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern IntPtr CreateFileMapping(uint hFile, IntPtr lpAttributes, uint flProtect, uint dwMaximumSizeHigh, uint dwMaximumSizeLow, string lpName);
        

然后在共享端加入代码：

            string shareName = "XiaoY_H的内存共享";
            char[] myShrCntnt="共享内存passwordFuck985211".ToCharArray();
            IntPtr hMapFile = CreateFileMapping(INVALID_HANDLE_VALUE, IntPtr.Zero, PAGE_READWRITE, 0, 256, shareName);
            IntPtr pBuf = MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, 256);
            Marshal.Copy(myShrCntnt, 0, pBuf, myShrCntnt.Length);

            Console.WriteLine("共享内存建立完成,它就在这儿:IntPtr->{0:G}",pBuf.ToInt32());
            Console.ReadKey();
            UnmapViewOfFile(pBuf);
            CloseHandle(hMapFile);                   

在被共享端加入代码：

            string shareName = "XiaoY_H的内存共享";
            IntPtr hMapFile = OpenFileMapping(FILE_MAP_ALL_ACCESS, false, shareName);
            if (hMapFile==IntPtr.Zero)
            {
                Console.WriteLine("Null MapFile!");
                return;
            }
            IntPtr pBuf = MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, 256);
            if (pBuf==IntPtr.Zero)
            {
                Console.WriteLine("Null Buffer!");
                return;
            }
            Console.WriteLine("共享内存数据：" + Marshal.PtrToStringUni(pBuf));
            Console.ReadKey();
            UnmapViewOfFile(pBuf);
            CloseHandle(hMapFile);