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CDataFile Class

Tuesday Oct 2nd 2001 by LiQintao LiQintao

The CDataFile class is used to create and modify data files such as *.ini and *.cfg.

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
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