Modifying contents of a .txt-file using MFC 1

[d00ape]

Hi!

If I have the following “C:\textfile.txt” with contents:
---------------
Hi there.
This dog is blue and his ID: 1234. BlaBla…
---------------

and would traverse it and find “ID:” and change “1234” to for e.g. “56” so the file would look like:
---------------
Hi there.
This dog is blue and his ID: 45. BlaBla…
---------------

I’m programming VC++ and MFC. Any tips of how I could tackle my problem.

Thanks - Anders

 

[PerFnurt]

A bit confused about what you wanted to replace it with, but assuming you want you replace the "1234" with "56" this could work:

const CString cFileName = "C:\\textfile.txt";
CString s;
{
	CFile f(cFileName,CFile::modeRead);
	UINT len=f.GetLength();
	f.Read(s.GetBuffer(len),len);
	s.ReleaseBuffer();
}
s.Replace("ID: 1234","ID: 56");
{
	CFile f(cFileName,CFile::modeWrite);
	f.Write((LPCTSTR)s,s.GetLength());
}

/Per

_{"It was a work of art, flawless, sublime. A triumph equaled only by its monumental failure."}

 

[d00ape]

Perfect!!