File manage problem. - C / C++ / MFC Discussion Boards

kakan14-Feb-07 23:48

14-Feb-07 23:48

Just a thought: I think (but haven't verified it), that a file has to be opened in binary mode for seek:s (and tell) to work properly.
Maybe that's your problem?

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: Seekg problem in text file?

Vishvanathan15-Feb-07 0:09

Vishvanathan

15-Feb-07 0:09

Hi Kakan,

I am using text mode only.The text file contains upto 50 lines.During the process, the seekg function is not working at some times only.Most of the time, the file pointer seek to previous position successfully. I don't known the exact reason for this seek function behavior.

Is any other way to correct this problem?

Vichu

Re: Seekg problem in text file?

kakan15-Feb-07 0:17

kakan

15-Feb-07 0:17

Yes, what I already said: use binary mode for the file handling. Or rather: try, I still haven't checked that I'm correct (but I'm pretty sure I'm right).

The only thing you will have to put up with, using binary mode, is that you will get CR/LF-sequences as they exists in the file. That is, no conversion to a single \n.
An easy way to overcome this "problem" is to simply ignore all CR characters read from the file.

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: Seekg problem in text file?

Vishvanathan15-Feb-07 0:34

Vishvanathan

15-Feb-07 0:34

I will try the binary mode operation and then update you.

Thanks kakan.

Vichu

Re: Seekg problem in text file?

Vishvanathan21-Feb-07 23:35

Vishvanathan

21-Feb-07 23:35

Hi kakan,

I fixed that seekg problem. Just I read the text file in binary mode rather than text mode.

Thank you for your response.

Regards,

Vichu

Re: Seekg problem in text file?

krmed15-Feb-07 0:41

krmed

15-Feb-07 0:41

If your file is really formatted as you have shown, you might want to use GetPrivateProfileString and SetPrivateProfileString instead. They are intended to handle files with the format you show

[SECTION]
Key=Value
Key2=Value2

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: Seekg problem in text file?

Vishvanathan21-Feb-07 23:38

Vishvanathan

21-Feb-07 23:38

Hi krmed,

You are exactly correct. But in my application, I am using fstream class and its member function to read/write the text file. The seekg function works well in binary mode.

Thank you for your information.

Vichu

File manage problem.

david bagaturia14-Feb-07 19:31

david bagaturia

14-Feb-07 19:31

Hi all.

I have some problem, I need class thet manage files as CFile in MFC, but in console.

can anyone help me.

Thanks for any help.

Re: File manage problem.

Don Box14-Feb-07 19:35

Don Box

14-Feb-07 19:35

MFC can be used in Console application also. So use MFC, and then u can use its CFile also.

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Re: File manage problem.

Nibu babu thomas14-Feb-07 20:05

Nibu babu thomas

14-Feb-07 20:05

david bagaturia wrote:
I have some problem, I need class thet manage files as CFile in MFC, but in console.

Look up AfxWinInit in MSDN. There is a sample along with it.

Also when you create a console project you have an option where you can specify whether you want MFC support for your application or not.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: File manage problem.

Michael Dunn14-Feb-07 20:17

Michael Dunn

14-Feb-07 20:17

You can use CFile in a console app. The AppWizard for console apps has a checkbox for adding MFC support.

--Mike--
Visual C++ MVP Cool | :cool:

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Re: File manage problem.

david bagaturia14-Feb-07 20:31

david bagaturia

14-Feb-07 20:31

Tanks all.

It will useful for me, it solve a proble in my other project sow it help me lot, but in this time I am writing service and I need console, I can't use MFC.

Re: File manage problem.

Nibu babu thomas14-Feb-07 21:21

Nibu babu thomas

14-Feb-07 21:21

david bagaturia wrote:
but in this time I am writing service and I need console, I can't use MFC.

What about fstream?

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: File manage problem.

david bagaturia14-Feb-07 21:51

david bagaturia

14-Feb-07 21:51

Thanks all.

I have solve problem!!

Cool | :cool:

Appending & inseting Text in RichEdit

Swapnil G14-Feb-07 18:52

Swapnil G

14-Feb-07 18:52

Hi,

I am working on RichEdit Control,I am using it in Wizard Dialog.
I want to append & insert Unicode Text at specific position in RichEdit in the format such as (BOLD,ITALIC,ARIAL etc.).
if anyone has idea please tell me.
Smile | :)

Thanks,
Swapnil.

Re: Appending & inseting Text in RichEdit

Hamid_RT14-Feb-07 20:57

Hamid_RT

14-Feb-07 20:57

I think you aksed this question on previous messages I suppose you couldn't find answer,If I remember true I think I saw a discuss on the www.codeguru.com(Visual c++ section) about RichEdit(format text,...) see it yesterday

WhiteSky

Re: Appending & inseting Text in RichEdit

Mark Salsbery15-Feb-07 7:04

Mark Salsbery

15-Feb-07 7:04

I'm pretty sure I answered yesterday. Since you didn't believe that answer (apparently) then
maybe you haven't read anything about Rich Edit Controls[^]...

Great job, team. Head back to base for debriefing and cocktails.

Reference class from global

Oliver12314-Feb-07 18:18

Oliver123

14-Feb-07 18:18

I have a fragment of code as an example, and I'm trying to figure out what it does and how.

void WINAPI CLeft::Abc(LinkPtr pData)<br />
{<br />
   g_Spec().Xyz(pData);<br />
}

I know CLeft::CLeft is a global outside of any class. It receives callbacks from a server.
I know Xyz is in a class.
I know the pointer pData is being passed.
I think both Abc and Xyz are defined in the same file.
I'm not sure what g_Spec().Xyz()really is.

I'm trying to figure out how and where one defines g_Spec().Xyz(pData)so it can
1)be referenced by Xyz
2)be a class or within a class

Anything look familiar? I really don't know if there is enough here to provide sufficient information.

I am currently using the following and don't like it. It seems too complex, but that's how I got it to work.
Abc is outside any class.
Xyz is a function in CNewDlg.

void WINAPI Abc(LinkPtr pData)<br />
{<br />
((CNewDlg*)AfxGetApp()->m_pMainWnd)->Xyz(pData);

<---I don't like this
}

Thanks

Re: Reference class from global

jhwurmbach14-Feb-07 21:59

jhwurmbach

14-Feb-07 21:59

Oliver123 wrote:
I'm not sure what g_Spec().Xyz()really is.

From its name it semms to be a global, and from its use I think it could be a global function, returning the reference to a singelton-instance of a class providing a function called Xyz, which takes a parameter that very well could be a LinkPtr.

Oliver123 wrote:
void WINAPI Abc(LinkPtr pData)
{
((CNewDlg*)AfxGetApp()->m_pMainWnd)->Xyz(pData); <---I don't like this
}

Have you considered sending a user defined message?

Failure is not an option - it's built right in.

c programming

deeps_cute14-Feb-07 17:05

deeps_cute

14-Feb-07 17:05

i have to list all the hardware devices in the system by c language. is there any function to display all the devices. anyone know this. please help me

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Re: c programming

Waldermort14-Feb-07 20:22

Waldermort

14-Feb-07 20:22

Please don't keep repeating the same question. There is no simple function. You could get all the information you need from the registry.

How to creat a new folder and a new file

zhangguoliming14-Feb-07 9:20

zhangguoliming

14-Feb-07 9:20

Hey, I want to creat a new folder with a new file. Now my code can only creat a new folder but no file.What is the wrong with my code?Please help anyway you can.. Thanks in advance.

m_Luting is the name of the folder , type CString
m_Name is the name of the file ,type CString

My code :

char path[300];
CString stname=".bin";
CString cell;

CreateDirectory(_T(m_Luting), NULL);

strcat(path,m_Luting);
strcat(path,m_Name);
strcat(path,stname);

fstream fMyfile;
fMyfile.open(path,ios:out|ios::binary|ios::trunc);

if(!fMyfile){ exit(-1);}

fMyfile.close();

Re: How to creat a new folder and a new file

David Crow14-Feb-07 9:54

David Crow

14-Feb-07 9:54

zhangguoliming wrote:
strcat(path,m_Luting);

This should probably be strcpy() instead.

zhangguoliming wrote:
fMyfile.open(path,ios:out|ios::binary|ios::trunc);

What is the value of path at this point?

On a side note, since you are using MFC, have you looked into CFile?

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"Judge not by the eye but by the heart." - Native American Proverb

Re: How to creat a new folder and a new file

#realJSOP14-Feb-07 10:01

#realJSOP

14-Feb-07 10:01

1) don't put m_Luting in a _T() macro.

2) Since you're using MFC, use it all the way...

if (CreateDirectory(m_Luting))
{
	CString sPath;
	sPath.Format("%s\\%s%s", m_Luting, m_Name, stName);
	CFile file;
	CFileException e;
	if (file.Open(sPath, CFile::modeCreate | CFile::modeWrite, &e)
	{
		#ifdef _DEBUG
		afxDump << "File could not be opened " << e.m_cause << "\n";
		#endif
		return;
	}
	else
	{
		file.Close();
	}
}
else
{
	AfxMessageBox("Could not create folder.");
}

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Re: How to creat a new folder and a new file

Sceptic Mole14-Feb-07 10:19

Sceptic Mole

14-Feb-07 10:19

zhangguoliming wrote:
Hey, I want to creat a new folder with a new file. Now my code can only creat a new folder but no file.What is the wrong with my code?Please help anyway you can.. Thanks in advance.

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