cdtddset.cpp

来自「一个通讯管理机的源代码。比较好用。推荐」· C++ 代码 · 共 64 行

#include "cdtddset.h"

bool CCDTDDSet::GetFirst()
{
	bool bRet = false;
	if ( GetFirstRecord() == XB_NO_ERROR )
	{
		m_wLocalNo = GetLongField(localno);
		m_dwYCNo = GetLongField(ycno);
		m_fCoef = GetFloatField(coef);
		bRet = true;
	}
	return bRet;
}
	
bool CCDTDDSet::GetNext()
{
	bool bRet = false;
	if (GetNextRecord() == XB_NO_ERROR )
	{
		m_wLocalNo = GetLongField(localno);
		m_dwYCNo = GetLongField(ycno);
		m_fCoef = GetFloatField(coef);
		bRet = true;
	}
	return bRet;
}
	
short CCDTDDSet::Update()
{
	PutLongField(localno,m_wLocalNo);
	PutLongField(ycno,m_dwYCNo);
	PutFloatField(coef,m_fCoef);
	return PutRecord(GetCurRecNo());
}

short CCDTDDSet::Add()
{
	BlankRecord();			/* blank out the record buffer */
	PutLongField(localno,m_wLocalNo);
	PutLongField(ycno,m_dwYCNo);
	PutFloatField(coef,m_fCoef);
	return AppendRecord();
}

void CCDTDDSet::Delete(WORD	wLocalNo)
{
	ExclusiveLock( F_SETLKW ); /* lock the files for our exclusive use */
	if (GetFirst())
	{
		do {
			if (m_wLocalNo == wLocalNo)
			{
				DeleteRecord();
				if (RecordDeleted())
					PackDatabase(F_SETLKW);
				break;
			}
		} while(GetNext());
	}
	ExclusiveUnlock();     /* unlock the files */
}