wzdview.cpp

《Visual C++ MFC编程实例》配套代码,如果大家正在学习此教程

// WzdView.cpp : implementation of the CWzdView class
//

#include "stdafx.h"
#include "Wzd.h"

#include "WzdDoc.h"
#include "WzdView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CWzdView

IMPLEMENT_DYNCREATE(CWzdView, CView)

BEGIN_MESSAGE_MAP(CWzdView, CView)
	//{{AFX_MSG_MAP(CWzdView)
	ON_COMMAND(ID_TEST_WZD, OnTestWzd)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CWzdView construction/destruction

CWzdView::CWzdView()
{
	// TODO: add construction code here

}

CWzdView::~CWzdView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CWzdView drawing

void CWzdView::OnDraw(CDC* pDC)
{
	CWzdDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CWzdView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CWzdView diagnostics

#ifdef _DEBUG
void CWzdView::AssertValid() const
{
	CView::AssertValid();
}

void CWzdView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

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

/////////////////////////////////////////////////////////////////////////////
// CWzdView message handlers

void CWzdView::OnTestWzd() 
{
	CFile file;
	CFileStatus status;
	CString msg;

	CString sFile("Wzd.tmp");
	char buffer[]={"This is my disk data."};

	// see if file exists
	if (!CFile::GetStatus(sFile,status))
	{
		msg.Format("%s does not exist",sFile);
		AfxMessageBox(msg);
	}

	// create and open file for write
	if (!file.Open( sFile, CFile::modeCreate|CFile::modeWrite))
	{
		msg.Format("Failed to create %s.",sFile);
		AfxMessageBox(msg);
	}

	// write to file
	file.Write(buffer,sizeof(buffer));

	// close file
	file.Close();

	// open file for read
	if (!file.Open( sFile, CFile::modeRead))
	{
		msg.Format("Failed to open %s.",sFile);
		AfxMessageBox(msg);
	}

	// get file length
	UINT nBytes = file.GetLength();

	// seek to beginning, end and in the middle
	file.SeekToEnd();
	file.Seek(20,CFile::begin); //also CFile::end and CFile::current
	file.SeekToBegin();

	// read file
	nBytes=file.Read(buffer,sizeof(buffer));

	// close file
	file.Close();

	// make file read only
	if (CFile::GetStatus( sFile, status ))
	{
		status.m_attribute|=0x01;
		CFile::SetStatus( sFile, status );
	}

	// delete file
	CFile::Remove(sFile);

}