C#调用C++ DLL(结构体中二维数组转换)

peterb 2010-09-15 10:10:56

想在C# WinForm开发中调用一个采用C++封装好的dll, 但其结构体中的二维数组不知道应当如何转换, 网上搜索了一把P/Invoke资料相对来说比较少, 没有找到切实有用的文章, 现在调用虽不会报错了, 但没有产生预期效果.



#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);

...全文

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zeng198821 2012-07-18

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学习了，正在为这个事情头痛，CLR搞死人啊

q521863 2010-10-29

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我是来学习的

wapdos 2010-09-16

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DING YI GE

josxhn 2010-09-16

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好高端啊，先顶后学

danruojun 2010-09-16

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转换成一维数组处理，注意长度就行。

porschev 2010-09-16

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up......

itneste 2010-09-16

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[Quote=引用 2 楼 bloodish 的回复:]

C++的多维数组,转成C#的一维数组处理

C# code

[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct TServerInfo
{
[MarshalAsAttribute(Unmanag……
[/Quote]

学习

peterb 2010-09-16

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根据2楼方法解决, 还有原先代码忘记给数组指定元素个数了



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

        public struct TServerInfo

        {

            public int uID;



            [MarshalAsAttribute(UnmanagedType.ByValArray, SizeConst = 3 * 16)]

            public char[] csStrMIP;



            [MarshalAsAttribute(UnmanagedType.ByValArray, SizeConst = 3)] // 这里原先忘记指定了

            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;

        }

bloodish 2010-09-15

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C++的多维数组,转成C#的一维数组处理



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

        public struct TServerInfo

        {   

            [MarshalAsAttribute(UnmanagedType.ByValArray, SizeConst = 3*16]

            public char[] csStrMIP;

        }

刚自己写的试验代码



typedef struct tagSvrInfo

{

  char csStrMIP[3][16];

}TSvrInfo,*LPSvrInfo



//assign char value 'a','b','c'

PIDLL_API void Login(LPSvrInfo info)

{

	info->csStrMIP[0][0] = 'a';

	info->csStrMIP[1][0] = 'b';

	info->csStrMIP[2][0] = 'c';

}



extern "C"

{

   PIDLL_API void Login(LPSvrInfo info);

};



        [DllImport("pidll.dll")]

        static extern int Login(ref SvrInfo info);



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

        public struct SvrInfo

        {

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3 * 16)]

            public char[] csStrMIP;

        }



        static void Main(string[] args)

        {

            SvrInfo si = new SvrInfo();

            si.csStrMIP = new char[48];



            Login(ref si);



            Console.WriteLine(si.csStrMIP[0]);

            Console.WriteLine(si.csStrMIP[16]);

            Console.WriteLine(si.csStrMIP[32]);

        }



        /*---------------输出为----------

        a

        b

        c

        ------------------------------*/