从 vc++ 链接到 oci 库时出错

Question

我使用 Oracle 9i（个人 edtn）中的 OCI 库从我的 C 程序连接到数据库。（我使用 Visual C++ 2005） ive 包含了 oci 中的所有 lib 文件，并将它们也包含在附加依赖项中，但是 当我编译以下代码时，出现链接器错误。

#include "stdafx.h"
#include "Form1.h"
#include <occi.h>
#include<oratypes.h>


using namespace ovci;
using namespace oracle;

[STAThreadAttribute]
int main(array<System::String ^> ^args)
{
        oracle::occi::Environment* environment;
    oracle::occi::Connection *con;
    oracle::occi::Statement* stmt;
    oracle::occi::ResultSet* res;    
        environment = oracle::occi::Environment::createEnvironment(oracle::occi::Environment::DEFAULT);
        con = environment->createConnection("scott", "tiger", "");
        stmt = con->createStatement("select * from emp2");
        res = stmt->executeQuery();
        stmt->closeResultSet(res);
        con->terminateStatement(stmt);
        environment->terminateConnection(con);
    Application::EnableVisualStyles();
    Application::SetCompatibleTextRenderingDefault(false);
    Application::Run(gcnew Form1());
    return 0;
}

我得到的错误是，

ovci.obj : error LNK2028: unresolved token (0A000016) "public: static class oracle::occi::Environment * __clrcall oracle::occi::Environment::createEnvironment(enum oracle::occi::Environment::Mode,void *,void * (__clrcall*)(void *,unsigned int),void * (__clrcall*)(void *,void *,unsigned int),void (__clrcall*)(void *,void *))" (?createEnvironment@Environment@occi@oracle@@$$FSMPAV123@W4Mode@123@PAXP6MPAX1I@ZP6MPAX11I@ZP6MX11@Z@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)
ovci.obj : error LNK2019: unresolved external symbol "public: static class oracle::occi::Environment * __clrcall oracle::occi::Environment::createEnvironment(enum oracle::occi::Environment::Mode,void *,void * (__clrcall*)(void *,unsigned int),void * (__clrcall*)(void *,void *,unsigned int),void (__clrcall*)(void *,void *))" (?createEnvironment@Environment@occi@oracle@@$$FSMPAV123@W4Mode@123@PAXP6MPAX1I@ZP6MPAX11I@ZP6MX11@Z@Z) referenced in function "int __clrcall main(cli::array<class System::String ^ >^)" (?main@@$$HYMHP$01AP$AAVString@System@@@Z)

Answer 1

由于某种原因，编译器弄乱了 oracle 标头中回调的调用约定。尝试：

#pragma managed(push, off)
#include <occi.h>
#include <oratypes.h>
#pragma managed(pop)