C语言调用powerBuilder开发数据库
C语言编写数据库系统不方便，可以使用权PBNI接口来操作powerbuilder，开发数据库轻松。
[cpp]
// pbtest.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "stdio.h"
typedef PBXEXPORT PBXRESULT (*P_PB_GetVM)(IPB_VM** vm);
int main(int argc, char* argv[])
{
IPB_Session* session;
IPB_VM* pbvm = NULL; //Load the PowerBuilder VM module
HINSTANCE hinst = LoadLibrary("pbvm90.dll");
if ( hinst== NULL)
return 0;
fprintf(stderr, "Loaded PBVM successfully\n");
P_PB_GetVM getvm = (P_PB_GetVM)GetProcAddress (hinst,"PB_GetVM");
if (getvm == NULL) return 0;
getvm(&pbvm);
if (pbvm == NULL) return 0;
LPCTSTR LibList[] = {"genapp.dll"};
if ( pbvm->CreateSession("genapp", LibList, 1, &session) != PBX_OK )
{
fprintf(stderr, "Error in CreateSession\n");
return 1;
}
fprintf(stderr, "Created session successfully\n");
pbgroup group = session->FindGroup("nvo_mult", pbgroup_userobject);
if (group == NULL)
return 0; // Now find the class nvo_mult in the group
pbclass cls = session->FindClass(group,"nvo_mult");
if (cls == NULL)
return 0; // Create an instance of the PowerBuilder object
pbobject pbobj = session->NewObject(cls);
PBCallInfo ci; // To call the class member function f_mult, // pass its signature as the last argument // to GetMethodID
pbmethodID mid = session->GetMethodID(cls, "f_mult", PBRT_FUNCTION, "III"); // Initialize call info structure based on method ID
session->InitCallInfo(cls, mid, &ci);
ci.pArgs-> GetAt(0)->SetInt(10);
ci.pArgs-> GetAt(1)->SetInt(20);
try {
session->InvokeObjectFunction(pbobj, mid, &ci); // Was PB exception thrown?
if (session->HasExceptionThrown())
{ // Handle PB exception
session->ClearException();
}
} catch (...)
{ // Handle C++ exception
} // Get the return value and print it to the console
pbint ret = ci.returnValue->GetInt();
fprintf(stderr, "The product of 123 and 45 is %i\n", ret);
session->FreeCallInfo(&ci);
//delete &ci; // Release session
session->Release();
return 0;
FreeLibrary(hinst);
}
补充：软件开发 , C语言 ,
