Re: CString How Big - C / C++ / MFC Discussion Boards

Iain Clarke, Warrior Programmer7-May-04 1:43

7-May-04 1:43

I'm open to correction, but I'd have to say no.

The logic is fairly simple. The protocols are for fetching any old file. Whereas file version info
(as I understand you to mean) is only available for specific kinds of files. What is the version
info of a notepad file? a bitmap? etc.

One way around could be to have a server side page to return version info on specified files.
eg.
http://foo.bar/versioninfo.asp?file=\downloads\example.exe
could return version info for the specified file, or "Get lost, no version info here!" otherwise.

I hope my musings helped, rather than mislead!

Iain.

Reports Generation (Advice Required)

Imtiaz Murtaza7-May-04 0:20

Imtiaz Murtaza

7-May-04 0:20

Dear Friends,

I've developed a software in Visual C++ (Dialog Based Application). Actually the purpose of this software is to make the database entry/view operations easy. There are in all 19 dialog boxes realted to various tables of database. The backend database is SQL Server.

The problem is that i am making this software for client and the client wants "report generation" in the form of print outs and eMails. The client given me samples of around 50 different reports Frown | :(

Now i want to know that what strategy should i follow in order to make reports. Do i need Crystal Reports software. Is there any other easy way. Please suggest me something..

Imtiaz

Problem with calling stack window

HansGanter6-May-04 23:08

HansGanter

6-May-04 23:08

Hello,
I have a problem to show the source code in the calling stack window( ALT+7 ) in debug mode.
I use VC++ 6.0 on my Win98 laptop.
There is no source code displayed from MFC-functions and SDK functions in the calling stack window, although the correct directories are set in the option dialog of the VC++.
With the same VC++ project file (.dsp and .dsw ) I don't have this problems with my Win2000 PC.
I checked all directories and I reinstall VC++ some times, but I don't get the source code.
Which problem does my laptop have ?

Re: Problem with calling stack window

Jens Doose7-May-04 2:46

Jens Doose

7-May-04 2:46

Try reinstalling the latest service pack for DevStudio.
That should do the trick.

Jens

CString How Big

sweep1236-May-04 22:05

sweep123

6-May-04 22:05

What is the maximum size of string you can place in a Edit Box on a dialog. Note I am using CString for holding the text.

I am using a multiline Edit Box to display the progress of a test activity. The display used to be a DOS Window.

I use the following code to update the output:-

m_Output.SetFocus(); // Set the focus to main window of the GUI
m_strNewText.Format ("%s", m_pMsg->OutputText); // Copy from memory into m_strNewText variable
m_strOutput+= m_strNewText + crlf; // Total display string;
SetDlgItemText(IDC_OUTPUT1, m_strOutput); // Display the new text appended onto old text
UpdateData(); // Refresh the control

I was thinking of checking the size and restarting when getting near the limit, but what is the limit?

Re: CString How Big

Hesham Amin6-May-04 22:17

Hesham Amin

6-May-04 22:17

Edit controls on Windows NT/ 2000:0x7FFFFFFE characters
Edit controls on Windows 95/98: 0x7FFE characters

this for single line edit controls

you can change this with : CEdit::SetLimitText

Re: CString How Big

sweep1237-May-04 0:48

sweep123

7-May-04 0:48

Many thanks for the information.

Re: CString How Big

David Crow7-May-04 3:00

David Crow

7-May-04 3:00

An edit box can hold 2¹⁶ characters. A CString object can hold 2³¹ characters. Use a richedit control if you want to hold more.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: CString How Big

J.B.23-Jun-04 7:19

J.B.

23-Jun-04 7:19

Does that mean the system allocates with 2^31 bytes of memory space for it whenever I create a CString object? If so, is it not a good idea to using CStrings if I know the string has only few hundred bytes long?

Thanks

Re: CString How Big

David Crow23-Jun-04 7:40

David Crow

23-Jun-04 7:40

J.B. wrote:
Does that mean the system allocates with 2^31 bytes of memory space for it whenever I create a CString object?

Only if it needs to. Check out how memory is allocated in CString::AllocBuffer().

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

CString questions

deecasas6-May-04 22:01

deecasas

6-May-04 22:01

Hi, I am a newbie in Visual C++ Programming concerning MFCs. I'm just wondering what the difference is between string and CString?

Strings have strcpy, strlen, etc, etc... So what are its counterparts for CStrings? What are the different ways of manipulating CStrings?

Thank you so much in advance Smile | :)

Re: CString questions

Anonymous6-May-04 22:24

Anonymous

6-May-04 22:24

Equivalents:

C       CString<br />
strcpy: =<br />
strlen: cs.GetLength()<br />
strcat: +=<br />
strlwr: cs.MakeLower()

Best regards Smile | :)

Re: CString questions

deecasas6-May-04 22:31

deecasas

6-May-04 22:31

Thank you so much Big Grin | :-D

I have another question... Do you guys know what command is used in order to check if a certain character can be found in a string?

I have searched through the net and found out that there is such a thing as Find for CStrings, although everytime I add #include "CString.h" which is necessary to use find, it doesn't work and only produce errors...

How do you use the commnad Find or is there any other way to check if a character can be fond in a CString?

Thank you once again Big Grin | :-D

Re: CString questions

jmkhael6-May-04 22:33

jmkhael

6-May-04 22:33

CString::Find

MSDN:
// First example demonstrating
// CString::Find ( TCHAR ch )
CString s( "abcdef" );
ASSERT( s.Find( 'c' ) == 2 );
ASSERT( s.Find( "de" ) == 3 );

// Second example demonstrating
// CString::Find( TCHAR ch, int nStart )
CString str("The stars are aligned");
int n = str.Find('e', 5);
ASSERT(n == 12);

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: CString questions

Steve S6-May-04 22:45

Steve S

6-May-04 22:45

Are these errors compile time? If so, what's the complaint about?

Do you mean "CStringt.h", or possibly "cstring"?

Steve S

Re: CString questions

Maxwell Chen6-May-04 22:45

Maxwell Chen

6-May-04 22:45

If you are working around with a MFC project generated by VC++, there's no need to include any header file for CString. If you insist, then do:
#include <cstringt.h> // Visual Studio .NET

If you are using string, you have to include <string>. And class string is in namespace std.

Maxwell Chen

Re: CString questions

deecasas7-May-04 2:56

deecasas

7-May-04 2:56

Thank you to all those who replied about my question Smile | :)

I really appreciate it. So sorry about the header file... I thought there was still a need for me to add a CString header file when I intend to use its functionalities Laugh | :laugh:

Thanks guys Wink | ;)

SHBrowseForFolder

Ni@m6-May-04 21:59

Ni@m

6-May-04 21:59

How to get full path to folder using SHGetPathFromIDList, or maybe in other way, but using only SHBrowseForFolder

Re: SHBrowseForFolder

Hesham Amin6-May-04 22:33

Hesham Amin

6-May-04 22:33

check this:
http://www.codeproject.com/shell/cxsbrowsefolder.asp[^]
and search articles for : SHBrowseForFolder
you'll find many articles about it.

how to get COleDispatchDriver's point from COleDispatchDriver's handle?

wl@syntc.com.cn6-May-04 21:55

wl@syntc.com.cn

6-May-04 21:55

how to get _DSpreadSheet's point from _DSpreadSheet's handle?
(class _DSpreadSheet : public COleDispatchDriver)

CButton's point can get from CButton's handle.
CButton *p;
p = (CButton *)CWnd::FromHandle(glhTargetWnd);

help me! 555555

Re: how to get COleDispatchDriver's point from COleDispatchDriver's handle?

Anthony_Yio7-May-04 0:07

Anthony_Yio

7-May-04 0:07

Try

pYourWnd->GetControlUnknown();

Sonork 100.41263:Anthony_Yio

Life is about experiencing ...

Re: how to get COleDispatchDriver's point from COleDispatchDriver's handle?

wl@syntc.com.cn7-May-04 14:35

wl@syntc.com.cn

7-May-04 14:35

thank you for your answer,
but my point is HWND__ and your pYourWnd is CWnd.
I can not use it.
How can I do ?

Re: how to get COleDispatchDriver's point from COleDispatchDriver's handle?

Anthony_Yio10-May-04 1:44

Anthony_Yio

10-May-04 1:44

That is easy.

Use

CWnd *pWnd = CWnd::FromHandle(yourHWND);

Sonork 100.41263:Anthony_Yio

Life is about experiencing ...

Reading timecode in avi files

FredericCharton6-May-04 21:24

FredericCharton

6-May-04 21:24

How can I do to read the timecode in avi files before render them with DirectShow filter ?
Can you give me sample codes ?
Thank you for your answer.

Fred

Single Instance restriction

Mr Bose Dayala6-May-04 19:52

Mr Bose Dayala

6-May-04 19:52

Hi,
From my application I am launchin another exe by calling thrugh WinExec("EXE path",SW_SHOW).But the problem here is EXE is getting opened every time when I click the toolbar butto.I want to restrict this for single instance.
can anybody help me regarding this?

Bose Dayala

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.