relationset.cpp

最新推荐文章于 2024-11-08 13:58:01 发布

FUN1206

最新推荐文章于 2024-11-08 13:58:01 发布

阅读量300

点赞数

CC 4.0 BY-SA版权

文章标签： file

本文链接：https://blog.youkuaiyun.com/FUN1206/article/details/6327307

本文详细介绍了C++中关系集类的实现原理及使用方法，包括构造函数、默认连接字符串、默认SQL语句、字段交换等核心功能。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

// RelationSet.cpp : implementation file
//

#include "stdafx.h"
#include "myapp.h"
#include "RelationSet.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CRelationSet

IMPLEMENT_DYNAMIC(CRelationSet, CRecordset)

CRelationSet::CRelationSet(CDatabase* pdb)
: CRecordset(pdb)
{
//{{AFX_FIELD_INIT(CRelationSet)
m_COUNTER = INVALID;
m_ID = INVALID;
m_PID = INVALID;
m_VALUE1 = INVALID;
m_VALUE2 = INVALID;
m_VALUE3 = INVALID;
m_VALUE4 = INVALID;
m_VALUE5 = INVALID;
m_nFields = 8;
//}}AFX_FIELD_INIT
m_nDefaultType = dynaset;
}

CString CRelationSet::GetDefaultConnect()
{
return _T("ODBC;DSN=TryDB");
}

CString CRelationSet::GetDefaultSQL()
{
return _T("[relation]");
}

void CRelationSet::DoFieldExchange(CFieldExchange* pFX)
{
//{{AFX_FIELD_MAP(CRelationSet)
pFX->SetFieldType(CFieldExchange::outputColumn);
RFX_INVALID(pFX, _T("[COUNTER]"), m_COUNTER);
RFX_INVALID(pFX, _T("[ID]"), m_ID);
RFX_INVALID(pFX, _T("[PID]"), m_PID);
RFX_INVALID(pFX, _T("[VALUE1]"), m_VALUE1);
RFX_INVALID(pFX, _T("[VALUE2]"), m_VALUE2);
RFX_INVALID(pFX, _T("[VALUE3]"), m_VALUE3);
RFX_INVALID(pFX, _T("[VALUE4]"), m_VALUE4);
RFX_INVALID(pFX, _T("[VALUE5]"), m_VALUE5);
//}}AFX_FIELD_MAP
}

/////////////////////////////////////////////////////////////////////////////
// CRelationSet diagnostics

#ifdef _DEBUG
void CRelationSet::AssertValid() const
{
CRecordset::AssertValid();
}

void CRelationSet::Dump(CDumpContext& dc) const
{
CRecordset::Dump(dc);
}
#endif //_DEBUG