首页 > 代码库 > 【.NET进程通信】初探.NET中进程间通信的简单的实现
【.NET进程通信】初探.NET中进程间通信的简单的实现
废话不多说,IPC就是进程间通信。
进程间通信可以采用的方法很多,比如创建端口后采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。
先在项目中添加相关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);然后在共享端添加代码:
string shareName = "XiaoY_H的内存共享"; char[] myShrCntnt="共享内存密码Fuck985211".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("共享内存建立完毕,它就在这儿:IntPtr->{0:G}",pBuf.ToInt32()); Console.ReadKey(); UnmapViewOfFile(pBuf); CloseHandle(hMapFile);在被共享端添加代码:
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);
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