C# 调用非托管代码的问题 传送void* 类型参数 望高手解救！！

[clamlp]

各位老兄：
这个问题已经搞得我望美人兮天一方 啊~~~~~~~~~~~~~绝望。
飞天诚信的NetRockey6Smart SDK中有这样一个函数： int DICNet_Command(DWORD dwHandle,int cmd,void* data);
完成对指定网络锁的操作
data是跟命令有关的输入/输出数据，它原来的定义是
// RUN_DATA 所需要的 data 结构是:
typedef struct
{
WORD RunID;
WORD ParaSize;
BYTE Para[1]; // 大小为 ParaSize
} DICST_Before_Run_Data;

// RUN_DATA 返回参数的时候，data 结构是:
typedef struct
{
WORD ResultSize;
BYTE Result[1]; // 大小为 ResultSize
} DICST_After_Run_Data;
我在C#里定义成

[StructLayout(LayoutKind.Sequential)]
        struct DICST_Before_Run_Data
        {
            public UInt16 RunID;

            public UInt16 ParaSize;

            public byte[] Para ;

        }
        [StructLayout (LayoutKind.Sequential)]
        struct DICST_After_Run_Data
        {
            public UInt16 ResultSize;

            public byte[] Result ;

        }

data开始是用于传入一个指向DICST_Before_Run_Data的指针 ，调用结束后它指向DICST_After_Run_Data

我试了好几种方法

[DllImport("Nr6Cli.dll", CharSet = CharSet.Unicode, SetLastError = true)]
        static extern int DICNet_Command(uint handle, int cmd, [MarshalAs(UnmanagedType.LPStruct)] object pData);
    //在unSafe下用指针也不行，提示无法创建指向结构体的指针
 

到底应该怎么处理。SOS

[clamlp]

它的VC调用例子是这样的
BYTE byData[256];

DICST_Before_Run_Data* pBeforeRun=(DICST_Before_Run_Data*)byData;
DICST_After_Run_Data* pAfterRun=(DICST_After_Run_Data*)byData;

pBeforeRun->RunID=(WORD)dwID;
pBeforeRun->ParaSize=(WORD)dwSize;
for(DWORD i=0; i<dwSize; i++) pBeforeRun->Para[i]=(BYTE)dwData[i];

dwRet=g_DICNet6S.Command(g_dwCurHandle,RUN,byData);

if(dwRet)
{
printf("****** Run %04X failed, retCode=%08X(%u).\n",dwID,dwRet,dwRet);
}

else
{
printf("****** Return data size: %d\n",pAfterRun->ResultSize);

DumpBuf(pAfterRun->Result,pAfterRun->ResultSize);

}

[zhangjjhua]

帮顶

[masterz]

何不用VC++给它做一个.NET的封装？

[clamlp]

先谢过~~~~~~`
我试一下先！！

[真相重于对错]

[StructLayout(LayoutKind.Sequential)]
struct DICST_Before_Run_Data
{
public UInt16 RunID;

public UInt16 ParaSize;

public System.IntPtr Para ;

}
[StructLayout (LayoutKind.Sequential)]
struct DICST_After_Run_Data
{
public UInt16 ResultSize;

public System.Intptr Result ;

}

[SAPikachu]

[StructLayout(LayoutKind.Sequential)]
struct DICST_Before_Run_Data
{
public UInt16 RunID;

public UInt16 ParaSize;

public byte[] Para;

}
[StructLayout(LayoutKind.Sequential)]
struct DICST_After_Run_Data
{
public UInt16 ResultSize;

//public byte[] Result;

}
[DllImport("Nr6Cli.dll", CharSet = CharSet.Unicode, SetLastError = true)]
static extern int DICNet_Command(uint handle, int cmd, [In,Out] IntPtr data);
static void Main(string[] args)
{
DICST_Before_Run_Data before;
IntPtr ptr = Marshal.AllocHGlobal(10); //分配足够内存
Marshal.StructureToPtr(before, ptr);
DICNet_Command(0, 0, ptr);
DICST_After_Run_Data after;
Marshal.PtrToStructure(ptr, after);
byte[] result = new byte[after.ResultSize+2];
Marshal.Copy(ptr,result,0,after.ResultSize+2); //丢弃前2字节，后面就是result
Marshal.FreeHGlobal(ptr);
}

没有调试过。。。楼主参考下吧。。。

[SAPikachu]

发现前面代码有点错误，修改下

[StructLayout(LayoutKind.Sequential)]
struct DICST_Before_Run_Data
{
public UInt16 RunID;

public UInt16 ParaSize;

//public byte[] Para;

}
[StructLayout(LayoutKind.Sequential)]
struct DICST_After_Run_Data
{
public UInt16 ResultSize;

//public byte[] Result;

}
[DllImport("Nr6Cli.dll", CharSet = CharSet.Unicode, SetLastError = true)]
static extern int DICNet_Command(uint handle, int cmd, [In,Out] IntPtr data);
static void Main(string[] args)
{
DICST_Before_Run_Data before;
byte[] Para;
IntPtr ptr = Marshal.AllocHGlobal(4+before.ParaSize); //分配足够内存
Marshal.StructureToPtr(before, ptr);
Marshal.Copy(Para, 0,new IntPtr( ptr.ToInt32() + 4), before.ParaSize);
DICNet_Command(0, 0, ptr);
DICST_After_Run_Data after;
Marshal.PtrToStructure(ptr, after);
byte[] result = new byte[after.ResultSize+2];
Marshal.Copy(ptr,result,0,after.ResultSize+2); //丢弃前2字节，后面就是result
Marshal.FreeHGlobal(ptr);
}

[EdisonJuice]

看一下先