海康卫视 NET_DVR_GetDVRWorkState 错误

 

    /// <summary>
    /// 通道信息(通道状态)
    ///     NET_DVR_CHANNELSTATE, *LPNET_DVR_CHANNELSTATE;
    /// </summary>
    public struct NET_DVR_CHANNELSTATE
    {
        public byte byRecordStatic; //通道是否在录像,0-不录像,1-录像
        public byte bySignalStatic; //连接的信号状态,0-正常,1-信号丢失
        public byte byHardwareStatic;//通道硬件状态,0-正常,1-异常,例如DSP死掉
        public char reservedData;
        public uint dwBitRate;//实际码率
        public uint dwLinkNum;//客户端连接的个数
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]  //MAX_LINK
        public uint[] dwClientIP;//客户端的IP地址
    }



    /// <summary>
    /// 14.2.1 硬盘信息结构体
    ///     NET_DVR_DISKSTATE, *LPNET_DVR_DISKSTATE;
    /// </summary>
    public struct NET_DVR_DISKSTATE
    {
        public uint dwVolume;//硬盘的容量
        public uint dwFreeSpace;//硬盘的剩余空间
        public uint dwHardDiskStatic; //硬盘的状态,休眠,活动,不正常等
    }



    /// <summary>
    /// 设备状态信息结构体(DVR工作状态)
    ///     NET_DVR_WORKSTATE, *LPNET_DVR_WORKSTATE;
    /// </summary>
    public struct NET_DVR_WORKSTATE
    {
        public uint dwDeviceStatic;  //设备的状态,0-正常,1-CPU占用率太高,超过85%,2-硬件错误,例如串口死掉

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public NET_DVR_DISKSTATE[] struHardDiskStatic; //MAX_DISKNUM

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public NET_DVR_CHANNELSTATE[] struChanStatic;//通道的状态MAX_CHANNUM

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public byte[] byAlarmInStatic; //报警端口的状态,0-没有报警,1-有报警MAX_ALARMIN

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
        public byte[] byAlarmOutStatic; //报警输出端口的状态,0-没有输出,1-有报警输出MAX_ALARMOUT
        public uint dwLocalDisplay;//本地显示状态,0-正常,1-不正常
    }


    /// <summary>
    /// 获取硬盘录像机工作状态
    ///     NET_DVR_API BOOL __stdcall NET_DVR_GetDVRWorkState(LONG lUserID, LPNET_DVR_WORKSTATE lpWorkState);
    /// </summary>
    /// <param name="lUserID">[in]NET_DVR_Login或者NET_DVR_Login_V30的返回值</param>
    /// <param name="lpWorkState">[out]存放获得工作状态信息</param>
    /// <returns></returns>
    [DllImport("HCNetSDK.dll")]
    public static extern bool NET_DVR_GetDVRWorkState(int lUserID, out NET_DVR_WORKSTATE lpWorkState);

HCNetSDK.NET_DVR_WORKSTATE WorkState;
 
if (HCNetSDK.IsInitDvr == true && lUserID >= 0)
 {
 HCNetSDK.NET_DVR_GetDVRWorkState(lUserID, out WorkState);
}