readme.wzd

来自「本书通过85个实例全面讲述了应用MFC进行Visual C++编程的思想。每个实」· WZD 代码 · 共 62 行

/////////////////////////////////////////////////////////////////////
// Modify any class...
/////////////////////////////////////////////////////////////////////

	CStdioFile file;
	CFileStatus status;
	CString msg;

	CString sFile("Wzd.txt");
	CString sRecord("This is my text data.");

// 1) see if file exists
	if (!CFile::GetStatus(sFile,status))
	{
		msg.Format("%s does not exist",sFile);
		AfxMessageBox(msg);
	}

// 2) create and open file for write
	if( !file.Open( sFile, CFile::modeWrite | CFile::typeText ))
	{
		if( !file.Open( sFile, CFile::modeCreate | CFile::modeWrite | CFile::typeText ))
		{
			msg.Format("Failed to create %s.",sFile);
		}
	}

// 3) write string to file
	file.WriteString(sRecord);

// 4) close file
	file.Close();

// 5) open file for read
	if (!file.Open( sFile, CFile::modeRead | CFile::typeText ))
	{
		msg.Format("Failed to open %s.",sFile);
		AfxMessageBox(msg);
	}

// 6) seek to beginning and end
	file.SeekToEnd();
	file.SeekToBegin();

// 7) read file
	while (file.ReadString(sRecord))
	{
	}

// 8) close file
	file.Close();

// 9) delete file
	CFile::Remove(sFile);


/////////////////////////////////////////////////////////////////////
// From: Visual C++ MFC Programming by Example by John E. Swanke
// Copyright (C) 1998 jeswanke. All rights reserved.
/////////////////////////////////////////////////////////////////////