C#调用C++ DLL(结构体中二维数组转换)

#define MAX_STRM_LAYER 3  // 最多几级流媒体

//服务器信息

typedef struct tagServerInfo

{

     long uID;                     

     char csStrMIP[MAX_STRM_LAYER][16];  // 这个不知道如何转换       

     unsigned short nStrMPort[MAX_STRM_LAYER];  



     char csDdtIP[16];             

     unsigned short nDdtPort;      

     unsigned short bIsWebUser;    



     unsigned short protocolType;  

     const char *pcUserName;       

     const char *pcPassword;       



     char csStoreFileSvrIP[16];         

     unsigned short nStoreFileSvrPort;  



     char csDevFileSvrIP[16];           

     unsigned short nDevFileSvrPort;    



}TServerInfo, *LPServerInfo;



LONG __stdcall StrM_Login(LPServerInfo mts, int iLayer = 1);

/// <summary>

/// 最多几级流媒体

/// </summary>

public const int MAX_STRM_LAYER = 3;



        /// <summary>

        /// 服务器信息

        /// </summary>

        [StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi)]

        public struct TServerInfo

        {

            public int uID;

            [MarshalAsAttribute(UnmanagedType.ByValArray, SizeConst = 3, ArraySubType = UnmanagedType.LPStr)]

            public string[] csStrMIP;



            public ushort[] nStrMPort;



            [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 16)]

            public string csDdtIP;



            public ushort nDdtPort;



            public ushort bIsWebUser;



            public ushort protocolType;



            public string pcUserName;



            public string pcPassword;



            [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 16)]

            public string csStoreFileSvrIP;



            public ushort nStoreFileSvrPort;



            [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 16)]

            public string csDevFileSvrIP;

 

            public ushort nDevFileSvrPort;

        }



        [DllImport("StreamMedia.dll")]

        public static extern int StrM_Login(ref TServerInfo mts, int iLayer);