C# 跨程序传图（共享内存块传图）跨exe传图

最新推荐文章于 2023-06-08 16:51:26 发布

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最新推荐文章于 2023-06-08 16:51:26 发布 · 1.2k 阅读

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CC 4.0 BY-SA版权

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本文介绍了如何使用C#的ShareMemory_Api类操作共享内存，包括创建文件映射、内存映射和数据复制，展示了如何将图像数据在进程间共享并进行读写操作。

共享内存的API

public class ShareMemory_Api
    {

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, int wParam, IntPtr lParam);

        [DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr CreateFileMapping(int hFile, IntPtr lpAttributes, uint flProtect, uint dwMaxSizeHi, uint dwMaxSizeLow, string lpName);

        [DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr OpenFileMapping(int dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, string lpName);

        [DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr MapViewOfFile(IntPtr hFileMapping, uint dwDesiredAccess, uint dwFileOffsetHigh, uint dwFileOffsetLow, uint dwNumberOfBytesToMap);

        [DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
        public static extern bool UnmapViewOfFile(IntPtr pvBaseAddress);

        [DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
        public static extern bool CloseHandle(IntPtr handle);

        [DllImport("kernel32", EntryPoint = "GetLastError")]
        public static extern int GetLastError();

        public const int INVALID_HANDLE_VALUE = -1;