[DllImport("mpr.dll", CharSet = CharSet.Ansi)]
        private static extern int WNetAddConnection2(NetResource netResource, string password, string username, int flag);
        [DllImport("mpr.dll", CharSet = CharSet.Ansi)]
        private static extern int WNetCancelConnection2(string lpname, int flag, bool force);
        /// <summary>
        /// 映射网络驱动器
        /// </summary>
        /// <param name="localName">本地盘符 如U:</param>
        /// <param name="remotePath">远程路经 如\\\\172.18.118.106\\f</param>
        /// <param name="userName">远程服务器用户名</param>
        /// <param name="password">远程服务器密码</param>
        /// <returns>true映射成功，false映射失败</returns>
        public static bool WNetReflectDrive(string localName, string remotePath, string userName, string password)
        {
            NetResource netResource = new NetResource();
            netResource.dwScope = 2;
            netResource.dwType = 0x1;
            netResource.dwDisplayType = 3;
            netResource.dwUsage = 1;
            netResource.LocalName = localName;
            netResource.RemoteName = remotePath;
            netResource.provider = null;
            int ret = WNetAddConnection2(netResource, password, userName, 0);
            if (ret == 0)
                return true;
            return false;
        }

        /// <summary>
        /// 断开网路驱动器
        /// </summary>
        /// <param name="lpName">映射的盘符</param>
        /// <param name="flag">true时如果打开映射盘文件夹，也会断开,返回成功 false时打开映射盘文件夹，返回失败</param>
        /// <returns></returns>
        public static bool WNetDisconnectDrive(string lpName, bool flag)
        {
            int ret = WNetCancelConnection2(lpName, 0, flag);
            if (ret == 0)
                return true;
            return false;
        }