C / C++ / MFC Discussion Boards

Member 439977110-Feb-10 1:08

10-Feb-10 1:08

Hi All,

I am reading some big files having thousands of lines, my requirement is to write some thing on the last but one line(i know the length of last line). how to seek my file pointer to last but one line with out seeking all the position from the beginning of the file?

i tried with some code, but not achieving the right goal. please check the code

long seekval = assfile.SeekToEnd();
assfile.Seek((seekval - 4.0),0);
assfile.WriteString(_T("some text"));

assfile is the CStdioFile obj.
4 is the length of the last line.

Thanks in advance.

Regards,
Kumar

Re: Problem in File seek()

Richard MacCutchan10-Feb-10 1:46

Richard MacCutchan

10-Feb-10 1:46

A quick look at the MSDN[^] page suggests this answer:

assFile.Seek(-4, CFile::end);

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Problem in File seek()

Mircea Puiu10-Feb-10 1:48

Mircea Puiu

10-Feb-10 1:48

Read the content of the file, modify what you need, write the file back. You cannot modify a line directly in a text file.

SkyWalker

Re: Problem in File seek()

normanS11-Feb-10 22:45

normanS

11-Feb-10 22:45

Are you sure about that?

My memory - not that I've done file handling in the last 4 or 5 years - says that you can modify whatever you want, you just can't add any characters or take away any characters (so you can't add a line of text to a text file, but you can change "Paul" to "Fred".

Re: Problem in File seek()

loyal ginger10-Feb-10 1:49

loyal ginger

10-Feb-10 1:49

If you are using CFile, then the second parameter for the Seek() method is from where to seek. In your case you should seek from the end of the file, using CFile::end. In your code, you are seeking from the beginning of the file.

--modification--

Sorry, Richard MacCutchan had already answered the question. Ignore mine, please!

Re: Problem in File seek()

Member 467820123-Feb-10 4:24

Member 4678201

23-Feb-10 4:24

First Read the last line
Move this line by the length of line you want to add in front.
Then paste the required line above it

I hope this will do

ashwani

antispyware

NetDefender 20099-Feb-10 23:47

NetDefender 2009

9-Feb-10 23:47

can anyone help me to buid a antispyware software in VC++.mai me at joeld_88@rediffmai .com.TNX in advance

Re: antispyware

Richard MacCutchan10-Feb-10 0:20

Richard MacCutchan

10-Feb-10 0:20

This is a ridiculous question. You are asking for a program that commercial organisations spend years developing. Nobody can give you that information in a few sentences or lines of code.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: antispyware

glitteringsound10-Feb-10 0:26

glitteringsound

10-Feb-10 0:26

You need to learn some programming to hook certain exes and get familiarity with headers and formats of EXE's to hook and process according to your needs. This can lead you to better explore the virus and Trojans activities in the system.

Good Luck
Regards
Muhammad Usman Khalil

Re: antispyware

CPallini10-Feb-10 0:40

CPallini

10-Feb-10 0:40

While you need to learn how to post at the right place... Roll eyes | :rolleyes:

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: antispyware

Richard MacCutchan10-Feb-10 0:42

Richard MacCutchan

10-Feb-10 0:42

You forgot the Smile | :)

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: antispyware

CPallini10-Feb-10 0:43

CPallini

10-Feb-10 0:43

NetDefender 2009 wrote:
can anyone help me to buid a antispyware software in VC++

Yes, I may send you a lot of spyware applications to be used as test cases... Wink | ;)

Re: antispyware

Bram van Kampen10-Feb-10 16:04

Bram van Kampen

10-Feb-10 16:04

Yes I Can,

Just send me a $10,000,000 cheque for Downpayment, and, after it clears I will try to assemble a group of about 10 world renowned analysts to look at the problem afresh. I will than issue you with a report of the Outline, and a cost projection for completing the program.

Smile | :)

Bram van Kampen

How can find out OS version of Client machine in Network?

Le@rner9-Feb-10 21:13

Le@rner

9-Feb-10 21:13

Hi all,

GetVersionEx function use to find out os details of current os of machine.

i want to find out the client os version on server machine.

can u please tell me how can i do this.

thanks in advance.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can find out OS version of Client machine in Network?

enhzflep9-Feb-10 23:23

enhzflep

9-Feb-10 23:23

I've no idea if there exists a better method, though I'd be inclined to simply query the registry on the server.

Should this be a viable method (security settings may well prevent it) then you may want to check the values of the following keys:

HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\Windows NT\CurrentVersion
- ProductName
- ProductId
- RegisteredOwner
- CSDVersion
- BuildLab

Re: How can find out OS version of Client machine in Network?

Hristo-Bojilov10-Feb-10 0:17

Hristo-Bojilov

10-Feb-10 0:17

Have you tried NetGetServerInfo?
But I suppose it requires MS Active directory , but I'm not sure...

Life is a stage and we are all actors!

Re: How can find out OS version of Client machine in Network?

Le@rner10-Feb-10 1:20

Le@rner

10-Feb-10 1:20

i m using it like this

	DWORD dwLevel = 101;
	LPSERVER_INFO_101 pBuf = NULL;
	NET_API_STATUS nStatus;
	LPWSTR pszServerName = L"Server";

	nStatus = NetServerGetInfo(pszServerName,
                              dwLevel,
                              (LPBYTE *)&pBuf);

if (nStatus == NERR_Success)
   {
     
      if ((pBuf->sv101_type & SV_TYPE_DOMAIN_CTRL) ||
         (pBuf->sv101_type & SV_TYPE_DOMAIN_BAKCTRL) ||
         (pBuf->sv101_type & SV_TYPE_SERVER_NT)||
		 (pBuf->sv101_type & SV_TYPE_ALL))
	  {

		  for (int i = 0; i < dwLevel; i++)
		 {
				if (pBuf == NULL)
					 break;
				LPWSTR szSName=pBuf->sv101_name;
				AfxMessageBox((LPCTSTR)szSName);

			  pBuf++;
		  }         
	  }
      
   }

NetServerGetInfo function return only server details.
i want to find out details of all client those are connected with server.

thanks

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can find out OS version of Client machine in Network?

Hristo-Bojilov10-Feb-10 2:49

Hristo-Bojilov

10-Feb-10 2:49

To retrieve all computers which are visible from the current domain use NetEnumServer.Next pass each these names to NetServerGetInfo to retrieve OS details for clients.

Life is a stage and we are all actors!

Re: How can find out OS version of Client machine in Network?

Hristo-Bojilov10-Feb-10 3:13

Hristo-Bojilov

10-Feb-10 3:13

The right function name is NetServerEnum not NetEnumServer.Sorry for my fault. Smile | :)

Life is a stage and we are all actors!

Re: How can find out OS version of Client machine in Network?

David Crow10-Feb-10 3:57

David Crow

10-Feb-10 3:57

Le@rner wrote:
LPWSTR szSName=pBuf->sv101_name;
AfxMessageBox((LPCTSTR)szSName);

You ask for the OS version of the remote machine, display the name of the machine, and then complain that it's not right. Why?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

Re: How can find out OS version of Client machine in Network?

Le@rner10-Feb-10 17:13

Le@rner

10-Feb-10 17:13

thanks its done now.

one more thing i want to know.

please tell me what is the valid number o os version.

because some time my network printer and fax machine also detected by NetServerEnum .

so i want to ignore these.

so if i able to check this have a valid os version no or not,i able to ignore there from detection.

or tell me if there is any othe better way to know this.

thank in advance.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can find out OS version of Client machine in Network?

David Crow11-Feb-10 2:54

David Crow

11-Feb-10 2:54

Le@rner wrote:
please tell me what is the valid number o os version.

Le@rner wrote:
because some time my network printer and fax machine also detected by NetServerEnum .

so i want to ignore these.

Did you look at the sv101_type member of SERVER_INFO_101?

SWF is not loading while setup triggers exe

rahul.kulshreshtha9-Feb-10 20:35

rahul.kulshreshtha

9-Feb-10 20:35

I have a problem. Don't know the exact reason.

I have created an MFC project which has a default dialog which is having Shockwave player ActiveX. This dialog is derived as

class MyClass : public CAxDialogImpl<MyClass>, public IDispEventImpl<IDC_SHOCKWAVEFLASH1, MyClass>

When I run this project or exe it get's load fine.

But when my setup runs it by choosing "Launch Now" option after successful install then it does not run. DoModal() returns -1 at this time.

While if I run it by "desktop shortcut" or "program files" shortcut then it runs fine again.

Any suggestion or solution.

Unicode support

kk.tvm9-Feb-10 19:44

kk.tvm

9-Feb-10 19:44

Hi friends

I have a program which reads a file from web. That file contains unicode (UTF-8) chars. I used below code for my operation, but it shows junk chars while reading file, please suggest a solution to me.

CInternetSession InternetSession;
CStdioFile *httpFile;
CString str;

httpFile = InternetSession.OpenURL("www.mysite.com");
while( httpFile->ReadString( str ) )
{
AfxMessageBox( str );
}

thanks in advance

-kk.tvm-

Re: Unicode support

Game-point9-Feb-10 20:02

Game-point

9-Feb-10 20:02

try

httpFile = InternetSession.OpenURL(L"www.mysite.com");

Failure is Success If we learn from it!!

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