C / C++ / MFC Discussion Boards

Re: serial communication in dilog based application in vc++

sarita_21627-Jul-09 18:36

27-Jul-09 18:36

my multimeter have rs232 interface, i want code for communicate thru serial port, like read/write/close/open function, i m new in the vc++. so i want code for dialog based application.

Re: serial communication in dilog based application in vc++

Iain Clarke, Warrior Programmer27-Jul-09 1:31

Iain Clarke, Warrior Programmer

27-Jul-09 1:31

I can't do any better than recommend the ever classic:
http://www.flounder.com/serial.htm[^]

Enjoy... and realise that serial programming is not quiiiiite as simple as you thought. Same with interfacing with anything!

Iain.

I have now moved to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), or need cotract work done, give me a job! http://cv.imcsoft.co.uk/[^]

help on using VC++ libraries

hareshel27-Jul-09 1:03

hareshel

27-Jul-09 1:03

Browsed my ocx file with dependency walker and found out that....

My.ocx file uses MFC90.DLL and MSVCR90.dll.

In Dependency walker, it takes the MFC90.dll from C:\windows\winsys\amd64_microsoft.VC90.mfc_***** folder. But MSCVR90.dll from C:\windows\winsys\amd64_microsoft.VC90.crt***** folder.

Looking at MFC90.dll dependencies it is not able to find MSVCR90.dll in the C:\windows\winsys\amd64_microsoft.VC90.mfc_***** folder. So...I am not able to register regsvr32 my.ocx file manually.

Please help me out here.

Re: help on using VC++ libraries

Adam Roderick J27-Jul-09 1:46

Adam Roderick J

27-Jul-09 1:46

64 bit OS?

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Re: help on using VC++ libraries

hareshel27-Jul-09 18:21

hareshel

27-Jul-09 18:21

yes it is 64bit OS.

n-ary tree traversing

DattaMane27-Jul-09 0:56

DattaMane

27-Jul-09 0:56

Hi all,
i want to traverse n-ary tree?
can someone help me please?

Re: n-ary tree traversing

CPallini27-Jul-09 1:31

CPallini

27-Jul-09 1:31

As forum guidelines [^] suggest, please be specific.
Smile | :)

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: n-ary tree traversing

David Crow27-Jul-09 3:25

David Crow

27-Jul-09 3:25

DattaMane wrote:
can someone help me please?

See here.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"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

How to reload the content in ifstream?

DevelopmentNoob27-Jul-09 0:09

DevelopmentNoob

27-Jul-09 0:09

Hi,
how to reload the content inside the ifstream file. Below is a part of code i doing now..

ifstream infile("test.txt");
string line2;
while (!infile.eof())
	{
		getline(infile,line2);
		itotalCount++;
	}

Here is ok.i get the total line in that file.
But next when i need find another info in that file,
the while loop din't function.i think is because the previous line is already reach
the eof..

while (!infile.eof())
{
       somework();
}

So, have any ideal can reload the content? Or there is already got function in stl which i dunno?
I'm waiting your answer..Thank you!

Re: How to reload the content in ifstream?

CPallini27-Jul-09 0:17

CPallini

27-Jul-09 0:17

DevelopmentNoob wrote:
But next when i need find another info in that file,
the while loop din't function.i think is because the previous line is already reach
the eof..

infile.seekg(0, ios::beg);

should do the trick (see [^])
Smile | :)

Re: How to reload the content in ifstream?

DevelopmentNoob27-Jul-09 15:08

DevelopmentNoob

27-Jul-09 15:08

i try the method you teach already. but still cannot work.
yes, it can run in while loop, but when i use infile.getline, the content i get is "".

i use infile.seekg(0), because in msdn, it say that in text file dun use the second method...
Any ideal about it?

Re: How to reload the content in ifstream?

CPallini27-Jul-09 20:53

CPallini

27-Jul-09 20:53

You're right using the first member function. I didn't notice the MSDN note.

DevelopmentNoob wrote:
but when i use infile.getline, the content i get is ""

You get all empty lines or some ones (maybe there are empty lines in your file)?
Smile | :)

CStdioFile Creation fails with exception - no error occurred

Deepak.Prahlad26-Jul-09 23:55

Deepak.Prahlad

26-Jul-09 23:55

Hi All,

I am trying to create a CStdioFile using below code. I plan to create the file where the ".exe" is. If the folder happens to be 'read only' the file creation fails as expected but the exception shows "no error occurred" Sniff | :^)

ie. bRet is FALSE (as expected) when tried to open the file. but the szError is "no error occured" (I guess here it should be "no write permission" or something like that)

Am I doing something wrong in the code? Please help.

BOOL CLoggerDlg::OpenFile(CString szFileName)
{
	CFileException ex;
	BOOL bRet = FALSE;
	if(LogFile.m_hFile == INVALID_HANDLE_VALUE)
	{
		bRet = LogFile.Open(szFileName,CStdioFile::modeCreate | CStdioFile::modeReadWrite | CStdioFile::shareDenyWrite | CStdioFile::modeNoTruncate,NULL);
		if ( !bRet )
		{
			TCHAR szError[1024];
			ex.GetErrorMessage(szError, 1024);
			MessageBox(szError);
		}
	}
	return bRet;
}

Re: CStdioFile Creation fails with exception - no error occurred

CPallini27-Jul-09 0:02

CPallini

27-Jul-09 0:02

You should pass (the address of) ex as last argument of LogFile.Open method,
i.e.

bRet = LogFile.Open(szFileName,CStdioFile::modeCreate | CStdioFile::modeReadWrite | 
   CStdioFile::shareDenyWrite | CStdioFile::modeNoTruncate, &ex);

Re: CStdioFile Creation fails with exception - no error occurred

Deepak.Prahlad27-Jul-09 0:11

Deepak.Prahlad

27-Jul-09 0:11

Thank you for the help.
I corrected the code and now it work as expected
Best regards,
Deepak

Re: CStdioFile Creation fails with exception - no error occurred

Adam Roderick J27-Jul-09 0:12

Adam Roderick J

27-Jul-09 0:12

Try this
FormatMessage and GetLastError instead of CFileException.
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL );

AfxMessageBox( (LPCTSTR)lpMsgBuf);

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displaying HEX value of any integer.

MahaKh26-Jul-09 23:24

MahaKh

26-Jul-09 23:24

i want to get the Hexadecimal value of an integer....what is the syntex to find it in VC++?

Re: displaying HEX value of any integer. [modified]

Adam Roderick J26-Jul-09 23:32

Adam Roderick J

26-Jul-09 23:32

simply Use %X or
1. method 1
int nHex = 0;
int nDec = 20;
CString csData;
csData.Format( _T( "%x" ), nDec );
nHex = _wtoi( csData.operator LPCTSTR());

2. method 2
cout<<hex<<17;
Smile | :)

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modified on Monday, July 27, 2009 5:47 AM

Re: displaying HEX value of any integer.

CPallini26-Jul-09 23:36

CPallini

26-Jul-09 23:36