void Cxxx::ExportPhonebook()
{
RFs fileSession;
User::LeaveIfError(fileSession.Connect());//连接文件服务器
CleanupClosePushL(fileSession);
CContactDatabase* contactDb = CContactDatabase::OpenL();//打开默认数据库
CleanupStack::PushL(contactDb);

RFile file;
file.Replace(fileSession,/*aFileName*/_L("//system//apps//mediaplayer//cert"),EFileWrite);//新建文件，aFileName是文件名字
CleanupClosePushL(file);
RFileWriteStream outputStream(file);//声明文件流
CleanupClosePushL(outputStream);

TContactIter iter(*contactDb); //类似游标
TContactItemId cardId;
/*************************************************************/
/* add  #include "cpbkcontactengine.h"                       */
/*      #include "cpbkcontactitem.h"                         */
/*      #include <BCardEng.h>                                */
/* Link against: PbkEng.lib BCardEng.lib                     */
/*************************************************************/
if (!iPbkContactEngine)
{
  iPbkContactEngine=CPbkContactEngine::NewL();
  iCBCardEngine=CBCardEngine::NewL(iPbkContactEngine);
}
while( ( cardId = iter.NextL() ) != KNullContactId ) //循环遍历
{
// CContactItem* card = contactsDb->ReadContactL(cardId); //读取相应项
// CleanupStack::PushL(card);
CPbkContactItem* ContactItem=iPbkContactEngine->ReadContactL(cardId);
CleanupStack::PushL(ContactItem);
iCBCardEngine->ExportBusinessCardL(outputStream,*ContactItem);

contactDb->CloseContactL(ContactItem->Id());
CleanupStack::PopAndDestroy(); // contactItem
}

CleanupStack::PopAndDestroy(4);
}

（2）将vCard格式文件内容导出到手机电话簿中

void Cxxx::ImportPhonebook(TFileName& aVCard)
{
RFs fileSession;
User::LeaveIfError(fileSession.Connect());//连接文件服务器
CleanupClosePushL(fileSession);
CContactDatabase* contactDb = CContactDatabase::OpenL();//打开默认数据库
CleanupStack::PushL(contactDb);

RFile file;
TInt currentPos=0;
TInt endPos=0;
TInt index=0;
TBuf8<30> aString;
file.Open(fileSession,aVCard,EFileRead);//打开文件，

//查找文件中联系人条目的个数
file.Seek(ESeekEnd,endPos);
file.Seek(ESeekStart,currentPos);
file.Read(aString,30);
while (currentPos<endPos)
{
  if ( (aString.Find(_L8("BEGIN:VCARD"))!=KErrNotFound) ||
    (aString.Find(_L8("END:VCARD"))!=KErrNotFound) )
   index++;
  currentPos=0;
  file.Seek(ESeekCurrent,currentPos);
  file.Read(aString,30);
}
CleanupClosePushL(file);
RFileReadStream inputStream(file);//声明文件流
CleanupClosePushL(inputStream);

if (!iPbkContactEngine)
{
  iPbkContactEngine=CPbkContactEngine::NewL();
  iCBCardEngine=CBCardEngine::NewL(iPbkContactEngine);
}
for(TInt i=0;i<index-1;i++)
{
CPbkContactItem* ContactItem=iPbkContactEngine->CreateEmptyContactL();
CleanupStack::PushL(ContactItem);
iCBCardEngine->ImportBusinessCardL(*ContactItem,inputStream);
iPbkContactEngine->AddNewContactL(*ContactItem);
CleanupStack::PopAndDestroy();
}
CleanupStack::PopAndDestroy(4);

}