各位大神，请教下C#调用C++动态库的问题，一直报内存损坏，请教下应该用什么类型，以下是dll的代码

[qq_39175942]

int _stdcall of_get_vip_info_test(const char* vipno, char* ret_vipxx[15], char* errMsg)
{
	int err = 0;
	int argc;
	char **argv = {0x00};

	 ofstream outClientFile4("of_get_vip_log.txt", ios::app);
	 outClientFile4<<"this is a test" <<endl;

	 outClientFile4<<vipno<<endl;

	
	const char *addr = ".\\xl_card.ini";
	char url[50],name[50],pass[50],qybh[50],vip_qybh[50],ping[50],application[50];
	GetPrivateProfileString("Easerver", "location", NULL, url, sizeof(url),addr);
	GetPrivateProfileString("Easerver", "userID", NULL, name, sizeof(name),addr); 
	GetPrivateProfileString("Easerver", "password", NULL, pass, sizeof(pass),addr); 
	GetPrivateProfileString("configure","qybh", NULL, qybh, sizeof(qybh),addr);
	GetPrivateProfileString("configure","vip_qybh", NULL, vip_qybh, sizeof(vip_qybh),addr);
	GetPrivateProfileString("Easerver", "ping", NULL, ping, sizeof(ping),addr);
	GetPrivateProfileString("Easerver", "application", NULL, application, sizeof(application),addr);

	WSAData wsaData;
	if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) {
		err = -1;
		strcpy(errMsg,"网络连接失败");
        return err;
	}
	char* errorMsg = (char*)malloc(sizeof(char)*100);
	int Error = doit(ping, errorMsg);
	if(Error != 0) {
		err = Error;
		strcpy(errMsg,errorMsg);
		free(errorMsg);
		return err;
	}
	// 释放Winsock资源
	free(errorMsg);
    WSACleanup();
	outClientFile4<<"this is a test2"<<endl;

	try
	{
		com_message* pMsg;
		
	    char* manager_url = url;
	    CORBA::ORB_var orb = CORBA::ORB_init(argc, argv, 0);
	    CORBA::Object_var obj;
	    obj = orb->string_to_object(manager_url);
	    SessionManager::Manager_var manager = SessionManager::Manager::_narrow(obj);

	    if (CORBA::is_nil(manager)) 
		{
		    err = -1;
			strcpy(errMsg,"Error: Null SessionManager::Manager instance. Exiting.");
		    return err;
		}
	    SessionManager::Session_var session = manager->createSession(name, pass);
	    if (CORBA::is_nil(session))
		{
		    err = -1;
			strcpy(errMsg,"Error: Null session. Exiting.");
		    return err;
		}
	    strcat(application,"com_card_ot");
	    com_card_ot_var pComp = com_card_ot::_narrow(Object_var(session->create(application)));

	    vip_info_str a_ret_vipxx;

		outClientFile4<<"this is a test3"<<endl;

	    pMsg = pComp->of_get_vip_info(vipno, a_ret_vipxx, (const char*)vip_qybh);


		outClientFile4<<pMsg->id<<endl;
		
	    if(pMsg->id == 0) //执行成功
		{
		    err = pMsg->id;
			outClientFile4<<"OK"<<endl;
			
  	        strcpy_s(ret_vipxx[0], (const char*)a_ret_vipxx.viptype);
			outClientFile4<<ret_vipxx[0]<<endl;


	        strcpy(ret_vipxx[1], (const char*)a_ret_vipxx.vipname);
			outClientFile4<<ret_vipxx[1]<<endl;


	        strcpy(ret_vipxx[2], (const char*)a_ret_vipxx.vname);
			outClientFile4<<ret_vipxx[2]<<endl;


	        strcpy(ret_vipxx[3], (const char*)a_ret_vipxx.vipno);
	        strcpy(ret_vipxx[4], (const char*)a_ret_vipxx.point);
	        strcpy(ret_vipxx[5], (const char*)a_ret_vipxx.jkrq);
	        strcpy(ret_vipxx[6], (const char*)a_ret_vipxx.yxq);
	        strcpy(ret_vipxx[7], (const char*)a_ret_vipxx.ljxfje);
			outClientFile4<<ret_vipxx[7]<<endl;
	        strcpy(ret_vipxx[8], (const char*)a_ret_vipxx.vipid);
	        strcpy(ret_vipxx[9], (const char*)a_ret_vipxx.level_id);
	        strcpy(ret_vipxx[10], (const char*)a_ret_vipxx.level_name);
			
			strcpy(errMsg,"成功");


	
		

		}
	    else
		{
            err = pMsg->id;
		    strcpy(errMsg,pMsg->txt);
		}
		
		return err;
	}
	catch( CORBA::OBJECT_NOT_EXIST cone )
	{
		err = -1;
        strcpy(errMsg,"Error: CORBA OBJECT_NOT_EXIST exception. Check the server log file for more information. Also verify that the 'com_card_ot' component has been created properly in Jaguar Manager.");
	    return err;
	}
	catch(CORBA::NO_PERMISSION npe)
	{
		err = -1;
		strcpy(errMsg,"Error: CORBA NO_PERMISSION exception. Check whether login authentication is enabled for your server and whether the component has restricted access. If so edit the source file to use a valid user name and password.");
		return err;
	}
	catch( CORBA::INV_OBJREF cio )
	{
		err = -1;
		strcpy(errMsg,"Error: CORBA INV_OBJREF exception.");
		return err;
	}
	catch ( CORBA::COMM_FAILURE ccf )
	{
		err = -1;
		strcpy(errMsg,"Error: CORBA COMM_FAILURE exception. Check that the specified host and IIOP port number are correct and that the server is running.");
		return err;
	}
	catch( CORBA::OBJ_ADAPTER )
	{
		err = -1;
		strcpy(errMsg,"Error: CORBA OBJ_ADAPTER");
		return err;
	}
	catch( CORBA::SystemException cse )
	{
		err = -1;
		strcpy(errMsg,"Error: CORBA System Exception. Check that the server hostname and IIOP port are specified correctly, and check the server's error log for more information.");
		return err;
	}
}

[guanyinsishengzi]

char* ret_vipxx[15] 改成char* ret_vipxx

[qq_39175942]

引用 1 楼 guanyinsishengzi 的回复:

char* ret_vipxx[15] 改成char* ret_vipxx

这是dll的源码，改不了，C#怎么取这个字符串数组地址

[xian_wwq]

char* ret_vipxx[15] 是个长度为15的char* 数组 char* -> stringbuilder char* [15] -> stringbuilder[15] stringbuilder 需要根据c dll要求先申请空间，后使用 还有个需要注意 c#默认的是Unicode，而c dll大多采用Ansi

[云海玉弓缘]

跟我之前调的一个dll的参数很相似，试试吧。。。。 [DllImport("xxx.dll")] public static extern int of_get_vip_info_test(ref string vipno, [MarshalAs(UnmanagedType.VBByRefStr)]ref string ret_vipxx, ref string errMsg); string ret_vipxx = "***************"; //要够15个字符 char* ret_vipxx[15] 15个字符，传参字符串要够15个，如果返回的字符串不足15个后面的会补\0