轉載請註明出處:http://blog.csdn.net/xiaoy_h/article/details/26090277
廢話不多說,IPC就是進程間通信。
進程間通信可以採用的方法很多,比如創建端口後採用組播技術進行握手連接,這裏要講到的就是通過內存文件映射的方法實現。
先在項目中添加相關API函數:
[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);
然後在共享端添加代碼:
string shareName = "XiaoY_H的內存共享";
char[] myShrCntnt="共享內存密碼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("共享內存建立完畢,它就在這兒:IntPtr->{0:G}",pBuf.ToInt32());
Console.ReadKey();
UnmapViewOfFile(pBuf);
CloseHandle(hMapFile);
在被共享端添加代碼:
string shareName = "XiaoY_H的內存共享";
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("共享內存數據:" + Marshal.PtrToStringUni(pBuf));
Console.ReadKey();
UnmapViewOfFile(pBuf);
CloseHandle(hMapFile);