ex28view.cpp

来自「一些VC++的经典实例」· C++ 代码 · 共 224 行

// ex28View.cpp : implementation of the CEx28View class
//

#include "stdafx.h"
#include "ex28.h"

#include "ex28Set.h"
#include "ex28Doc.h"
#include "ex28View.h"

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

/////////////////////////////////////////////////////////////////////////////
// CEx28View

IMPLEMENT_DYNCREATE(CEx28View, CDaoRecordView)

BEGIN_MESSAGE_MAP(CEx28View, CDaoRecordView)
	//{{AFX_MSG_MAP(CEx28View)
	ON_COMMAND(ID_RECORD_UPDATE, OnRecordUpdate)
	ON_UPDATE_COMMAND_UI(ID_RECORD_UPDATE, OnUpdateRecordUpdate)
	ON_COMMAND(ID_RECORD_DELETE, OnRecordDelete)
	ON_UPDATE_COMMAND_UI(ID_RECORD_DELETE, OnUpdateRecordDelete)
	ON_COMMAND(ID_RECORD_ADD, OnRecordAdd)
	ON_COMMAND(ID_RECORD_CLEAR, OnRecordClear)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CEx28View construction/destruction

CEx28View::CEx28View()
	: CDaoRecordView(CEx28View::IDD)
{
	//{{AFX_DATA_INIT(CEx28View)
	m_pSet = NULL;
	//}}AFX_DATA_INIT
	// TODO: add construction code here
	m_AddRecord=FALSE;
}

CEx28View::~CEx28View()
{
}

void CEx28View::DoDataExchange(CDataExchange* pDX)
{
	CDaoRecordView::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CEx28View)
	DDX_FieldText(pDX, IDC_EDIT1, m_pSet->m_CourseID, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT2, m_pSet->m_InstructorID, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT3, m_pSet->m_RoomNo, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT6, m_pSet->m_Capacity, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT4, m_pSet->m_SectionNo, m_pSet);
	DDX_FieldText(pDX, IDC_EDIT5, m_pSet->m_Schedule, m_pSet);
	//}}AFX_DATA_MAP
}

BOOL CEx28View::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CDaoRecordView::PreCreateWindow(cs);
}

void CEx28View::OnInitialUpdate()
{
	m_pSet = &GetDocument()->m_ex28Set;
	CDaoRecordView::OnInitialUpdate();
	GetParentFrame()->RecalcLayout();
	ResizeParentToFit();

}

/////////////////////////////////////////////////////////////////////////////
// CEx28View printing

BOOL CEx28View::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CEx28View::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CEx28View::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CEx28View diagnostics

#ifdef _DEBUG
void CEx28View::AssertValid() const
{
	CDaoRecordView::AssertValid();
}

void CEx28View::Dump(CDumpContext& dc) const
{
	CDaoRecordView::Dump(dc);
}

CEx28Doc* CEx28View::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CEx28Doc)));
	return (CEx28Doc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CEx28View database support
CDaoRecordset* CEx28View::OnGetRecordset()
{
	return m_pSet;
}


/////////////////////////////////////////////////////////////////////////////
// CEx28View message handlers

void CEx28View::OnRecordUpdate() 
{
	// TODO: Add your command handler code here
	if(m_AddRecord)
	{
		m_pSet->CancelUpdate();
		m_pSet->Move(0);
		m_AddRecord=FALSE;
	}
	m_pSet->Edit();
	UpdateData(TRUE);
	if(m_pSet->CanUpdate())
	{
		m_pSet->Update();
	}
}

void CEx28View::OnUpdateRecordUpdate(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(!m_pSet->IsBOF());
}

void CEx28View::OnRecordDelete() 
{
	// 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 CEx28View::OnUpdateRecordDelete(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(!m_pSet->IsEOF());
}

void CEx28View::OnRecordAdd() 
{
	// TODO: Add your command handler code here
	m_pSet->AddNew();
	m_AddRecord=TRUE;
	UpdateData(FALSE);
}

void CEx28View::OnRecordClear() 
{
	// TODO: Add your command handler code here
	m_pSet->SetFieldNull(NULL);
	UpdateData(FALSE);
}

BOOL CEx28View::OnMove(UINT nIDMoveCommand) 
{
	// TODO: Add your specialized code here and/or call the base class
	if(m_AddRecord)
	{
		if(!UpdateData(TRUE))
		{
			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_AddRecord=FALSE;
		return TRUE;
	}
	else
		return CDaoRecordView::OnMove(nIDMoveCommand);
}