C / C++ / MFC Discussion Boards

gamitech9-Jun-04 8:41

9-Jun-04 8:41

why don't yopu try the void
*memset( void *dest, int c, size_t count );

function which inits the memory of a string with a given char on a certain length; or

char *_strset( char *string, int c );
char *_strnset( char *string, int c, size_t count );

#include <string.h>
#include <stdio.h>

void main( void )
{
char string[15] = "This is a test";
/* Set not more than 4 characters of string to be *'s */
printf( "Before: %s\n", string );
_strnset( string, '*', 4 );
printf( "After: %s\n", string );
}

Output

Before: This is a test
After: **** is a test

I hope this helped.

gabby

How to make a exe format ebook in C++

Tcpip20059-Jun-04 4:24

Tcpip2005

9-Jun-04 4:24

I found a lot of ebook on the web. I was very intrested. I want to make a ebook like this by myself.But what should I do and How can I do this? I want to use C++,Visual C++ 6.0. Any ideas or examples?

Thank you all.

Alick

Re: How to make a exe format ebook in C++

David Crow9-Jun-04 4:58

David Crow

9-Jun-04 4:58

Alick Xiong wrote:
I want to make a ebook like this by myself.But what should I do and How can I do this?

http://www.ebookswriter.com/

http://www.tomdownload.com/home_education/e_books_literature/ebookswriter.htm

http://www.axeman.co.nz/eBook_generator.html

http://www.webpronews.com/ebusiness/smallbusiness/wpn-2-20000514MakeYourOwnEbook.html

I do not know how to do it programmatically.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

cWho can share a CCamera (Driectx) with me?

chenbuaa9-Jun-04 3:37

chenbuaa

9-Jun-04 3:37

I need a CCamera class which indicate the camera in Directx.

Thanks~~

buaa_chenx@hotmail.com

How to log date and time

bhangie9-Jun-04 3:28

bhangie

9-Jun-04 3:28

Hi
I would like to know how to log the date and time and retrieve them at later stage.
Someone books to attend a conference i want to log the exact time and date the booking whas made.
Do i use the time class and just somehow write these to a file or how do i do that.

many thanks

Education begins a gentleman,
conversation completes him Wink | ;)

Re: How to log date and time

V.9-Jun-04 3:36

9-Jun-04 3:36

CTime class.
You can get the lot.
I usely get the year, month ... in integer and set them via the Format function of CString in a CString (like: yyyy/mm/dd hh/mimi/ss)

Have Fun,

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimmy Hendrix

Re: How to log date and time

toxcct9-Jun-04 7:55

toxcct

9-Jun-04 7:55

<font style="color:blue;">#include</font> <ofstream>
 
<font style="color:blue;">void </font>LogMessage (LPCTSTR strMessage) {
    std::ostream OutputFile(<font style="color:purple;">"C:\\MyFolder\\My_log_file.txt"</font>);
    CTime CurrentTime = CTime::GetCurrentTime();
    CString TimeMrk = <font style="color:purple;">"["</font> + CurrentTime.Format(<font style="color:purple;">"%H:%M:%S"</font>) + <font style="color:purple;">"] "</font>;
 
    OutputFile << TimeMrk << strMessage;     <font style="color:green;">//Logging the message into the file, with the format (for example) : "[18:12:34] Message to log..."</font>
}

TOXCCT >>> GEII power

VS.NET hangs on exit

Tim Smith9-Jun-04 3:23

Tim Smith

9-Jun-04 3:23

Ok, this isn't a programming question but...

Has anybody else out there had the problem of VS.NET hanging when you exit. The UI vanishes but devnet.exe remains in the background running. Practically everyone on this project has this problem.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Binding DB-Grid & ADO problem

Sumit Kapoor9-Jun-04 2:54

Sumit Kapoor

9-Jun-04 2:54

Hi Dear...

I'm trying to bind DB-Grid & ADO..please help Me..
I'm using MS-DB Grid Control & MS ADO Control ActiveX.using vc+6.0. I want to bind ADO & Grid

Thanks for help Advance..

what I'm Doing is:

int CDBGridTestDlg::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CDialog::OnCreate(lpCreateStruct) == -1)
return -1;
m_Ado.Create (NULL,WS_VISIBLE|WS_CHILD,CRect(0,0,100,20),this,IDC_ADODC1);
m_Ado.SetConnectionString("Provider=MSDASQL.1;Persist Security Info=False;Data Source=FileCheck");
//m_Ado.SetCommandType(2);
m_Ado.SetRecordSource("Select * From TBL_ITEM_TYPE");
m_Ado.Refresh();

m_Grid.Create(NULL,WS_VISIBLE|WS_CHILD,CRect(20,20,300,200),this,IDC_DBGRID1);
LPUNKNOWN pCursor=m_Ado.GetDSCCursor();
m_Grid.SetDataSource(pCursor);
m_Grid.BindProperty(0x9, &m_Ado);
m_Grid.Refresh();
return 0;
}

bye

---Sumit Kapoor---

Detected memory leaks! - How to get the point of memory leak and remove it

JHAKAS9-Jun-04 2:46

JHAKAS

9-Jun-04 2:46

Hi

As usual i recd. following message on my build output window

How to find the point of the memory leak and how to overcome it.

Thanks a lot for any suggestion.

Sandeep

Detected memory leaks! <br />
Dumping objects -><br />
strcore.cpp(118) : {1639} normal block at 0x0063B6B0, 181 bytes long.<br />
 Data: <            ODBC> 01 00 00 00 A8 00 00 00 A8 00 00 00 4F 44 42 43 <br />
D:\Documents and Settings\erc\Desktop\Pattern\DBManager.cpp(32) : {1633} client block at 0x0063B900, subtype 0, 100 bytes long.<br />
a CDatabase object at $0063B900, 100 bytes long<br />
D:\Documents and Settings\erc\Desktop\Pattern\PatternDoc.cpp(508) : {1535} client block at 0x0063A180, subtype 0, 88 bytes long.<br />
a CObject object at $0063A180, 88 bytes long

Leave your mark wherever you go

Re: Detected memory leaks! - How to get the point of memory leak and remove it

Diddy9-Jun-04 2:49

Diddy

9-Jun-04 2:49

You usually find the memory leak by simply clicking on the line reported say

strcore.cpp(118)

But, if that file resides out side your project, as strcore.cpp does (its part of MFC) it wont work.

The second leak should "D:\Documents and Settings\erc\Desktop\Pattern\DBManager.cpp(32) "

Double click it and it will take you to where it was allocated.

As for the first, you have a leak via a CString somewhere.

Re: Detected memory leaks! - How to get the point of memory leak and remove it

GDavy9-Jun-04 2:54

GDavy

9-Jun-04 2:54

ah you beat me to it... gotta type a little faster next time Big Grin | :-D

Re: Detected memory leaks! - How to get the point of memory leak and remove it

Diddy9-Jun-04 3:03

Diddy

9-Jun-04 3:03

Well they gets two answers to their Q not just one - effeciant this CP message board eh.

Re: Detected memory leaks! - How to get the point of memory leak and remove it

GDavy9-Jun-04 2:52

GDavy

9-Jun-04 2:52

one way is dubble clicking on the line
the other reading it..
first line says:
strcore.cpp(118) etc etc etc
says that the mem was allocated on line 118 of the strcore.cpp file...(but never deallocated)
in your DBManager.cpp file line 32 you allocate memory that wasn^t deallocated
same for PatternDoc.cpp line 508.
as for in which situations that occurs... Debug!! put breakpoints and read carefull your new and delete statements!

Regards,
Davy

Re: Detected memory leaks! - How to get the point of memory leak and remove it

JHAKAS9-Jun-04 3:08

JHAKAS

9-Jun-04 3:08

Thanks i will check it and will come up back

Leave your mark wherever you go

Select text inside edit box

marcomars9-Jun-04 2:22

marcomars

9-Jun-04 2:22

Hi,
this is my problem.
I have an MFC diaog based application with multiple edit boxes.
What I need to do is to automatically select all the text inside a box when clicking on it.
That's just what happens on Explorer address bar...

I've tried writing inside each OnSetfocusEdit function

m_edit.SetSel(0,-1);
m_edit.SetFocus();

I also tried to write only the line

m_edit.SetSel(0,-1);

but it didn't work.

If I put the same 2 lines in a button click the operation succeeds.

Why is this?

Can anyone help me?

Thank you in advance, Smile | :)

Marco.

Re: Select text inside edit box

GDavy9-Jun-04 2:56

GDavy

9-Jun-04 2:56

the SetFocus call is not necessary anymore in the OnSetFocus.. functions, since it allready is getting the focus.
That`s probably the source of all evil...

Regards,
Davy

Re: Select text inside edit box

marcomars9-Jun-04 3:23

marcomars

9-Jun-04 3:23

Already done, but it doesn't work...

Any other suggestion?

Thanks,

Marco.

Re: Select text inside edit box

Andrew Quinn AUS9-Jun-04 3:56

Andrew Quinn AUS

9-Jun-04 3:56

Hi Marco,

Try the PreTranslateMessage override, e.g. for an IE address bar type behaviour...

BOOL CMyDlg::PreTranslateMessage(MSG* pMsg) 
{
	BOOL bEatMe = FALSE;
	
	if (pMsg && pMsg->message == WM_LBUTTONDOWN)
	{
		CEdit* pEdit = (CEdit*)GetDlgItem(IDC_EDIT1);
		// Is this our edit control?
		if (pEdit && pEdit->GetSafeHwnd() && pMsg->hwnd == pEdit->GetSafeHwnd())
		{
			// select
			CWnd* pPrevFocus = pEdit->SetFocus();
			if (pPrevFocus == pEdit)
			{
				// already got focus so normal operation
			}
			else
			{
				// first time focus, so select all
				bEatMe = TRUE;
				pEdit->SetSel(0,-1, TRUE);
			}
		}

	}

	// return if we've processed this message or want the default/system to
	return (bEatMe) ? TRUE:CDialog::PreTranslateMessage(pMsg);
}

Hope this helps,
Andy

Re: Select text inside edit box

marcomars9-Jun-04 4:36

marcomars

9-Jun-04 4:36

;););););););););););););););)

Thanks a lot !!!!!! Now it WORKS !!!!!!

Marco.

Wink | ;)

;););););););););););););););)

Re: Select text inside edit box

David Crow9-Jun-04 3:13

David Crow

9-Jun-04 3:13

If the clicking of an edit control selects all of the text contained within it, how is a person able to make a correction? Normally, a double-click of an edit control selects all of the text contained within it, and a single-click merely places the edit cursor at some point within the control. Doesn't this sound counterintuitive?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: Select text inside edit box

Ravi Bhavnani9-Jun-04 4:33

Ravi Bhavnani

9-Jun-04 4:33

I think you'd want this behavior only if the user is likely to almost always replace the existing text. The user can still modify the text by pressing "End", "Home" or the arrow keys to first clear the selection, although this involves an extra keystroke.

/ravi

My new year's resolution: 2048 x 1536
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Converting Integer to POSITION?

sugumar9-Jun-04 2:06

sugumar

9-Jun-04 2:06

I hv Integer Value which i need to convert as POSITION to assign starting POSITION for the collection class.

CTypedPtrMap m_Contacts;
POSITION pos;
CString strKey;
CContact* pContact; // Collection class which reads information from local file

int iIndex = m_screenName.GetCurSel(); // gets cursor position from combo

Now i need to assign the cursor position as POSITION for CTypedPtrMap.
m_Contacts.GetNextAssoc(pos, strKey, pContact);

Please inform me how to solve this?

Re: Converting Integer to POSITION?

Mike Dimmick9-Jun-04 2:44

Mike Dimmick

9-Jun-04 2:44

Is the screen name the key into the contacts map? If it is, you can get that using m_screenName.GetLBText. If not, you could associate the key with the item in the combo using m_screenName.SetItemData.

I assume you have a good reason for using a Map, otherwise I would suggest using a List or an Array. MFC's map classes are based on a hash-table, which means that you won't get elements out of them in the order you inserted them, or in any predictable order, so you can't just call GetStartPosition then call GetNextAssoc repeatedly.

Stability. What an interesting concept. -- Chris Maunder

Re: Converting Integer to POSITION?

Diddy9-Jun-04 3:00

Diddy

9-Jun-04 3:00

A POSITION is like an iterator for a collection - its not synomous with an integer.

The CTypedPtrMap will be keyed by what ever you templateized it on - looking at this a string.

So you can find your CContact based on a CSring easily, which is the key into the map.

How did you insert into the map?

Did you insert all the keys into m_screenName, then insert each CContact into the map based on the key?

If so, you can do a GetText on the combo to get the text for item iIndex, then use that look up in the map.

CString str;
str = m_screenName.GetText(iIndex);

CContact* p = NULL;
BOOL b = m_Contacts.Lookup(str, p);

etc

If not, the only thing u can do is to advance around the map until u hit the position at iIndex:

POSTION pos = m_Contacts.GetStartPosition();

int nElement = 0;
while(pos != NULL && nElement++ <= iIndex)
{
pos = m_Contacts.GetNextAssoc(pos, strKey, pContact);
}

You get the idea - iterate around the map until you get to element iIndex.

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