daosnapview.cpp

《VC++ 编程技巧与示例 .rar》各个示例代码绝对可用

// DaoSnapView.cpp : implementation of the CDaoSnapView class
//

#include "stdafx.h"
#include "DaoSnap.h"

#include "DaoSnapSet.h"
#include "DaoSnapDoc.h"
#include "DaoSnapView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDaoSnapView

IMPLEMENT_DYNCREATE(CDaoSnapView, CDaoRecordView)

BEGIN_MESSAGE_MAP(CDaoSnapView, CDaoRecordView)
	//{{AFX_MSG_MAP(CDaoSnapView)
	ON_COMMAND(ID_RCD_ADD, OnRcdAdd)
	ON_COMMAND(ID_RCD_DELETE, OnRcdDelete)
	ON_COMMAND(ID_RCD_REFRESH, OnRcdRefresh)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CDaoRecordView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CDaoRecordView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CDaoRecordView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDaoSnapView construction/destruction

CDaoSnapView::CDaoSnapView()
	: CDaoRecordView(CDaoSnapView::IDD)
{
	//{{AFX_DATA_INIT(CDaoSnapView)
	m_pSet = NULL;
	m_bAddMode=FALSE;
	//}}AFX_DATA_INIT
	// TODO: add construction code here
}

CDaoSnapView::~CDaoSnapView()
{
}

void CDaoSnapView::DoDataExchange(CDataExchange* pDX)
{
	CDaoRecordView::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDaoSnapView)
	DDX_FieldText(pDX, IDC_EDIT1, m_pSet->m_Capacity, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT2, m_pSet->m_CourseID, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT3, m_pSet->m_InstructorID, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT4, m_pSet->m_RoomNo, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT5, m_pSet->m_Schedule, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT6, m_pSet->m_SectionNo, m_pSet);
	//}}AFX_DATA_MAP
}

BOOL CDaoSnapView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CDaoRecordView::PreCreateWindow(cs);
}

void CDaoSnapView::OnInitialUpdate()
{
	m_pSet = &GetDocument()->m_daoSnapSet;
	CDaoRecordView::OnInitialUpdate();
	GetParentFrame()->RecalcLayout();
	ResizeParentToFit();

}

/////////////////////////////////////////////////////////////////////////////
// CDaoSnapView printing

BOOL CDaoSnapView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CDaoSnapView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CDaoSnapView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CDaoSnapView diagnostics

#ifdef _DEBUG
void CDaoSnapView::AssertValid() const
{
	CDaoRecordView::AssertValid();
}

void CDaoSnapView::Dump(CDumpContext& dc) const
{
	CDaoRecordView::Dump(dc);
}

CDaoSnapDoc* CDaoSnapView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDaoSnapDoc)));
	return (CDaoSnapDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CDaoSnapView database support
CDaoRecordset* CDaoSnapView::OnGetRecordset()
{
	return m_pSet;
}


/////////////////////////////////////////////////////////////////////////////
// CDaoSnapView message handlers
//●:

void CDaoSnapView::OnRcdAdd() 
{
	// TODO: Add your command handler code here
	if(m_bAddMode)
	{
		OnMove(ID_RECORD_FIRST);
	}
	m_pSet->AddNew();
	m_bAddMode=TRUE;
	UpdateData(FALSE);
}

void CDaoSnapView::OnRcdDelete() 
{
	// TODO: Add your command handler code here
	m_pSet->Delete();
	m_pSet->MoveNext();
	if(m_pSet->IsEOF())
	{
		m_pSet->MoveLast();
	}
	if(m_pSet->IsBOF())
	{
		m_pSet->SetFieldNull(NULL);
	}
	UpdateData(FALSE);
}

void CDaoSnapView::OnRcdRefresh() 
{
	// TODO: Add your command handler code here
	if(m_bAddMode)
	{
		m_pSet->CancelUpdate();
		m_pSet->Move(0);
		m_bAddMode=FALSE;
	}
	m_pSet->Edit();
	UpdateData(TRUE);
	m_pSet->Update();
}

BOOL CDaoSnapView::OnMove(UINT nIDMoveCommand) 
{
	// TODO: Add your specialized code here and/or call the base class
	if(m_bAddMode)
	{
		if(!UpdateData())
		{
			return FALSE;
		}
		try
		{
			m_pSet->Update();
		}
		catch(CDaoException * e)
		{
			AfxMessageBox(e->m_pErrorInfo->m_strDescription);
			e->Delete();
			return FALSE;
		}
		m_pSet->Requery();
		UpdateData(FALSE);
		m_bAddMode=FALSE;
		return TRUE;
	}
	else
	{
		return CDaoRecordView::OnMove(nIDMoveCommand);
	}
}