c#调用c++ 封装的dll 尝试读取或写入受保护的内存。这通常指示其他内存已损坏。

Question

c++c#数据

Answer 1

struct DEV_ENCODER_INFO{
  char   szDevIp[DH_MAX_IPADDR_LEN];
  WORD   wDevPort;
  BYTE   bDevChnEnable;
  BYTE   byDecoderID;
  char   szDevUser[DH_USER_NAME_LENGTH_EX];
  char   szDevPwd[DH_USER_PSW_LENGTH_EX];
  int    nDevChannel;
  int    nStreamType;
  BYTE   byConnType;
  BYTE   byWorkMode;
  WORD   wListenPort;
  DWORD  dwProtoType;
  char   szDevName[64];
  BYTE   byVideoInType;
  char   szDevIpEx[DH_MAX_IPADDR_OR_DOMAIN_LEN];
  BYTE   bySnapMode;
  BYTE   byManuFactory;
  BYTE   byDeviceType;
  BYTE   byDecodePolicy;
  BYTE   bReserved[3];
  DWORD   dwHttpPort;
  DWORD   dwRtspPort;
  char   reserved[36];
};
上面是c++的结构体定义
下面是我在c#中的定义
 /// <summary>
    /// 编码器信息
    /// </summary>
      [StructLayout(LayoutKind.Sequential)]
    public struct DEV_ENCODER_INFO 
    {
        /// <summary>
        /// 前端DVR的IP地址
        /// </summary>
       [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
          public string szDevIP;
        /// <summary>
        /// 前端DVR的端口号
        /// </summary>
    //[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
          public  ushort wDevPort;
        /// <summary>
        /// 解码通道使能
        /// </summary>
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
          public Byte[] bDevChnEnable;
      // public byte bDevChnEnable;
        /// <summary>
        /// 对应解码通道号
        /// </summary>
      // public byte byDecoderID;
       [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
       public Byte[] byDecoderID;
        /// <summary>
        /// 用户名
        /// </summary>
       [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
          public string szDevUser;
        /// <summary>
        /// 密码
        /// </summary>
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
          public string szDevPwd;
        /// <summary>
        /// 通道号
        /// </summary>
       public int    nDevChannel;
        /// <summary>
        /// 码流类型
        /// </summary>
       public int    nStreamType;
        /// <summary>
        /// 链接类型 0:TCP   1:UDP   2:组播
        /// </summary>
       // public byte  byConnType;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
        public Byte[] byConnType;
        /// <summary>
        /// 0：直连   1：转发
        /// </summary>
       //public byte   byWorkMode;
       [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
       public Byte[] byWorkMode;
        /// <summary>
        /// 指示侦听服务的端口，转发时有效
        /// </summary>
      // [MarshalAs(UnmanagedType.ByValArray ,SizeConst = 64)]
          public ushort   wListenPort;
        /// <summary>
        /// 0：兼容以前  1：大华二代协议  2：大华系统集成协议  3：大华DSS协议   4：大华rtsp协议
        /// </summary>
       //[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
          public uint dwProtoType;
        /// <summary>
        /// 前端设备名称
        /// </summary>
       [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
          public string   szDevName;
        /// <summary>
        /// 该解码通道当前视频源类型:0-标清（SD）  1-高清（HD） 注:设备支持高清通道才有效
        /// </summary>
       //public byte   byVideoInType;
       [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
       public Byte[] byVideoInType;
        /// <summary>
        /// szDevip扩展，前端DVR的IP地址（可以输入域名）
        /// </summary>
       [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
          public string   szDevIpEx;
        /// <summary>
        /// 抓图模式(nStreamType==2时有效) 0：表示请求一帧，1：表示定时发送请求 
        /// </summary>
      // public byte   bySnapMode;
       [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
       public Byte[] bySnapMode;
        /// <summary>
        /// 目标设备的生产厂商，0:Private(大华私有)，1: AEBell(美电) 
        /// </summary>
      // public byte   byManuFactory;
       [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
       public Byte[] byManuFactory;
        /// <summary>
        /// 目标设备的设备类型,0:IPC 
        /// </summary>
     //  public byte   byDeviceType;
       [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
       public Byte[] byDeviceType;
        /// <summary>
        /// 目标设备的解码策略，0:兼容以前 1:实时等级高 2:实时等级中 3:实时等级低 4:默认等级 5:流畅等级高 6:流畅等级中 7:流畅等级低 
        /// </summary>
      // public byte   byDecodePolicy;
       [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
       public Byte[] byDecodePolicy;
        /// <summary>
        /// 保留 
        /// </summary>       [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 3)]
       public string bReserved;
        /// <summary>
        /// Http端口号,0-65535 
        /// </summary>
      // [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
          public uint dwHttpPort;
        /// <summary>
        /// Rtsp端口号,0-65535 
        /// </summary>
       //[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
          public uint  dwRtspPort;
        ///// <summary>
        ///// 
        ///// </summary>
        //[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
        //  public string   szChnName;
        /// <summary>
        /// 
        /// </summary
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 36)]
          public string  reserved;    }我自己分析  是数据类型的问题  但我不知道 具体到哪个   急用 在线等