【. NET process communication ". The simple implementation of interprocess communication in net

Needless to say, IPC is inter-process communication.

interprocess communication can be used in a number of ways, such as the creation of a port after the use of multicast technology handshake connection, here is to be described through the memory file mapping method implementation.

Add the relevant API functions to your project first:

        [DllImport ("kernel32.dll", EntryPoint = "OpenFileMapping", SetLastError = true, CharSet = CharSet.Auto)] pr        Ivate static extern IntPtr openfilemapping (UINT dwdesiredaccess, bool binherithandle, String lpname); [DllImport ("Kernel32.dll")] private static extern IntPtr MapViewOfFile (IntPtr hfilemappingobject, uint DWDESIREDACC        ESS, uint Dwfileoffsethigh, uint dwfileoffsetlow, uint dwnumberofbytestomap); [DllImport ("Kernel32.dll", EntryPoint = "UnmapViewOfFile", SetLastError = true, CharSet = CharSet.Auto)] Private St        atic 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);         

Then add the code on the shared side:

            String shareName = "Xiaoy_h memory sharing";            Char[] myshrcntnt= "Shared memory password Fuck985211". ToCharArray ();            IntPtr hmapfile = createfilemapping (Invalid_handle_value, IntPtr.Zero, page_readwrite, 0, N, shareName);            IntPtr PBuf = MapViewOfFile (hmapfile, file_map_all_access, 0, 0, N);            Marshal.Copy (myshrcntnt, 0, PBuf, myshrcntnt.length);                        Console.WriteLine ("Shared memory is established, it is here: intptr->{0:g}", Pbuf.toint32 ());            Console.readkey ();            UnmapViewOfFile (PBUF);            CloseHandle (Hmapfile);                   

Add code on the shared side:

            String shareName = "Xiaoy_h memory sharing";            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, N);            if (Pbuf==intptr.zero)            {                Console.WriteLine ("Null buffer!");                return;            }            Console.WriteLine ("Shared Memory data:" + Marshal.ptrtostringuni (PBuf));            Console.readkey ();            UnmapViewOfFile (PBUF);            CloseHandle (Hmapfile);