create Files in appending mode

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Hi,
How can I create Files in appending mode. I need to reuse the same file
whenever the application works.Help me to find it.

Thanks
Mithun Nair

Posted 7-Jan-11 3:02am

Mithun Nair

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E.F. Nijboer · Answer 1 · 2011-01-07T03:09:00

Solution 1

Use the CFile class and use the flag CFile::modeNoTruncate.

Have a look here for more info:
http://msdn.microsoft.com/en-us/library/cz0a83sb%28v=vs.80%29.aspx[^]

Good luck!

Posted 7-Jan-11 3:09am

E.F. Nijboer

Comments

fjdiewornncalwe 7-Jan-11 10:22am

Just to be a little more specific.
file.Open(lpszfileName, CFile::modeCreate|CFile::modeNoTruncate|CFile::modeReadWrite)
+5...

E.F. Nijboer 7-Jan-11 11:51am

Nice additional information :-D

Member 9274864 6-Sep-12 6:39am

Hi i used the same method iam not able to append the data in the excel sheet,can you kindly suggest how to do it ,below is my code

CCSVFile::CCSVFile(LPCTSTR lpszFilename, Mode mode)
: CStdioFile(lpszFilename, (mode == modeRead) ?
CFile::modeRead|CFile::shareDenyWrite|CFile::typeText
:
CFile::modeCreate|CFile::modeNoTruncate|CFile::modeReadWrite)

{

Nuri Ismail · Answer 2 · 2011-01-07T11:36:00

The file streams from The Standard C++ Library are also an option.
They don't require MFC (CFile does) and they are not OS specific (CreateFile and SetFilePointerEx are Windows specific APIs).

You can use std::ofstream[^].
See the documentation for std::ofstream::open[^] and. You can use something like:

std::ofstream myfilebin, myfiletxt;

// For binary files
myfilebin.open ("example.bin", std::ios::out | std::ios::app | std::ios::binary);

// For text files
myfiletxt.open ("example.txt", std::ios::out | std::ios::app);

For additional details refer to this[^] article.

Espen Harlinn · Answer 3 · 2011-01-07T11:15:00

Solution 2

You can also use the CreateFile[^] and the SetFilePointerEx[^] Windows API functions.

Regards
Espen Harlinn

Posted 7-Jan-11 11:15am

Espen Harlinn