CDataFile Class

Environment: VC++ 6.0. SP5, Win2k SP2

Functions and Usage

The main functions of CDataFile are shown in the following:

1. Create a file with two modes:

Function : BOOL CDataFile::CreateFile(LPCTSTR lpszFileName, UINT nFlags)

Usage: nFlags may be CREATE_MODE_REBUILD (Whether the file exists or not, recreate it) or CREATE_MODE_NOREBUILD (If the file has existed ,do not recreate it)

2. Open a file with three modes:

Function : BOOL CDataFile::OpenFile(LPCTSTR lpszFileName, UINT nFlags)

Usage: nFlags may be OPEN_MODE_READ ,OPEN_MODE_WRITE ,OPEN_MODE_READWRITE

3. Check a file whether it has exisited:

Function : INT CDataFile::CheckFileExsist(LPCTSTR lpszFileName)

Usage : Return values may be FLAG_FILE_EXIST , FLAG_FILE_NOEXIST

4. Get the number of lines in the file:

Function : UINT CDataFile::GetLines()

Usage : Return value is the number of lines.

5. Move the pointer to the line you want to operate:

Function : BOOL CDataFile::MoveToLine(UINT line)

Usage : If you want to use ReadLine() or WriteLine(),you must use MoveToLine() first.

6. Read the line you move to:

Function: BOOL CDataFile::ReadLine(CString &rString)

7. Insert, overwrite, delete a line at current line:

Function : void CDataFile::WriteLine(CString &wString, UINT nFlag)

Usage : nFlag may be WRITE_MODE_INSERT ,WRITE_MODE_OVERWRITE or WRITE_MODE_DELETE.If nFlag is WRITE_MODE_DELETE , the wString is the content of the line you will delete.

8. Close a file:

Function : void CDataFile::CloseFile()

Downloads

Download demo project - 24 Kb
Download source - 3 Kb


Comments

  • nice & lite code~

    Posted by Legacy on 08/12/2002 12:00am

    Originally posted by: neoleftz

    nice & lite code~

    Reply
  • Works fine

    Posted by Legacy on 07/31/2002 12:00am

    Originally posted by: Matthias

    ..It does what It should do (As far as I used it). Thanks for this Class

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • IBM SPSS Modeler is an extensive predictive analytics platform that is designed to bring predictive intelligence to decisions made by individuals, groups, systems, and the enterprise. By providing a range of advanced algorithms and techniques that include text analytics, entity analytics, decision management, and optimization, SPSS Modeler can help you consistently make the right decisions -- from the desktop or within operational systems. Check out this easy-to-absorb infographic to get a picture of what …

  • IBM Worklight is a mobile application development platform that lets you extend your business to mobile devices. It is designed to provide an open, comprehensive platform to build, run and manage HTML5, hybrid and native mobile apps.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date