C / C++ / MFC Discussion Boards

Re: how to get the number of lines shown in editbox

CPallini21-Dec-07 3:05

21-Dec-07 3:05

Win32?
Look at EM_GETLINECOUNT message documentation http://msdn2.microsoft.com/en-us/library/bb761586.aspx[^]

MFC?
look at CEdit::GetLineCount method documentation http://msdn2.microsoft.com/en-us/library/bb761586.aspx[^]

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.

[my articles]

Datashowing problem want to get rid of from if-else statement

Y_Kaushik20-Dec-07 23:53

Y_Kaushik

20-Dec-07 23:53

Hello...guru's

I am writing a program in VC++ its database related application.
In this case i fetch data from Oracle database.using CRecordset class.

When i write below code
no_field = rs.GetODBCFieldCount();
while(!rs.IsEOF())
{
for(i=0;i<no_field;i++)
{
rs.GetFieldValue(i,sString);
if(i==0)
{
SetDlgItemText(IDC_EDIT_DATE1,sString);
}
if(i==1)
{
SetDlgItemText(IDC_EDIT_DATE2,sString);
}
if(i==2)
{
SetDlgItemText(IDC_EDIT_UPDT,sString);
}
}
sString.Empty();
rs.MoveNext();
}

Although above code is work fine.........
but i want to get rid of from if else condition.....This method is fine for fetching certain field from database .But if table contain 200 or more entity in a row then i need to write 200 or more if else condition...

Can any one give me berief idea how can i do this apart from this way.........

Thanks in Advanced

Regard's
Kaushik

Re: Datashowing problem want to get rid of from if-else statement

Hamid_RT21-Dec-07 0:02

Hamid_RT

21-Dec-07 0:02

Instead use of if you can use of switch.
Switch(i)
{
case 0:
break;
case 1:
break;
default:
break;
}

Re: Datashowing problem want to get rid of from if-else statement

Cedric Moonen21-Dec-07 0:13

Cedric Moonen

21-Dec-07 0:13

And how can he get rid of the 200 tests conditions by using a switch ? Unsure | :~

Cédric Moonen
Software developer

Charting control [v1.2]

Re: Datashowing problem want to get rid of from if-else statement

Cedric Moonen21-Dec-07 0:11

Cedric Moonen

21-Dec-07 0:11

Open the resource file and give adjacent Id's for your controls. This, way, you can simply do something like this:

SetDlgItemText(IDC_FIRST_CTRL_ID+i,sString);

Cédric Moonen
Software developer

Charting control [v1.2]

Re: Datashowing problem want to get rid of from if-else statement

Matthew Faithfull21-Dec-07 0:11

Matthew Faithfull

21-Dec-07 0:11

Two things you could do here.

Use a switch statement

<br />
switch i<br />
{<br />
  case 1:<br />
   //Do stuff<br />
   break;<br />
  case 2:<br />
    //Do other stuff<br />
   break;<br />
}<br />

but I wouldn't recommend that if you really have 200 fields and 200 controls on your dialog. If that's the case the easiest way is to ensure the values of your control id's are sequential and then do something like this

<br />
for(i=0;i<no_field;i++)<br />
{<br />
  rs.GetFieldValue(i,sString);<br />
  SetDlgItemText( BASE_FIELD_CONTROL_ID + i, sString);<br />
  sString.Empty();<br />
  rs.MoveNext();<br />
}<br />

you might want to use different ranges based on field/control types and use a switch to change the SetDlgItemText call.

Nothing is exactly what it seems but everything with seems can be unpicked.

Re: Datashowing problem want to get rid of from if-else statement

Y_Kaushik21-Dec-07 19:08

Y_Kaushik

21-Dec-07 19:08

Thanks for reply ....
I follow second method... give the control adjacent
like IDC_CONTROL , IDC_CONTROL+1, IDC_CONTROL+2, and so on...

and i am very near to solve problem...

Thanks again for reply to all's

Note : Is it possible for me to get control handle at run time.

Regard's
Kaushik

Dynamically providing version information to a exe

neha.agarwal2720-Dec-07 22:50

neha.agarwal27

20-Dec-07 22:50

Hi all,

Actually i want to give my exe, version number, copyright information dynamically. Is it poosible to do so.....

Re: Dynamically providing version information to a exe

jhwurmbach20-Dec-07 23:08

jhwurmbach

20-Dec-07 23:08

How dynamic is "dynamically"?

Here, our build-server includes a small, generated file with a version resource in the main resources of the project.
That way, the version number is set automagically.

Let's think the unthinkable, let's do the undoable, let's prepare to grapple with the ineffable itself, and see if we may not eff it after all.
Douglas Adams, "Dirk Gently's Holistic Detective Agency"

Re: Dynamically providing version information to a exe

C^hris L^osinger21-Dec-07 5:45

C^hris L^osinger

21-Dec-07 5:45

you mean the stuff that shows up in the Explorer Properties page after you right-click on the EXE's icon ?

no, that's not possible.

that stuff comes from examining the EXE file directly, not from executing the EXE in any way.

image processing toolkits | batch image processing

Checking the camera is connecte or not

Deepu Antony20-Dec-07 22:26

Deepu Antony

20-Dec-07 22:26

pls help me...

I am connecting a webcam to my computer thorugh usb port.can anybody help me to write a code in vc++ or c++ to check whether the camera is connected or not.

"imapi.h" file missing - SDK version

palanirajan20-Dec-07 22:04

palanirajan

20-Dec-07 22:04

hi all.,
as part of my MFC app i have to write data into CD ROM., for that i got code form Microsoft , it is purly in win 32 -SDK, fine

they have used "Imapi.h" header file form SDK, but i dont have latest version of SDK in my XP machine, but i installed SP2, i try to download form Microsoft., fine

but i was not able to install the version of SDK,

can any one help me to get latest version of SDK (XP) or if any one have "imapi.h" header file, just send it to me

thanks
shiva

Re: "imapi.h" file missing - SDK version

ashishbhatt20-Dec-07 22:12

ashishbhatt

20-Dec-07 22:12

TRY TO DOEWNLOAD THIS FILE FROM BELOW LINK...

http://www.koders.com/cpp/fid6830CE30A8B1F9A1FBADC74CBDFCDD478004ECB6.aspx?s=Imapi.h[^]

Thanks.

Re: "imapi.h" file missing - SDK version

Cedric Moonen20-Dec-07 22:27

Cedric Moonen

20-Dec-07 22:27

palanirajan wrote:
if any one have "imapi.h" header file, just send it to me

That's stupid. What will you do with a header file but no correct library file ?
The only correct thing to do is to download the required platform SDK from microsoft. So, what problem are you having there ?

Cédric Moonen
Software developer

Charting control [v1.2]

system tray - right click option

Paulraj G20-Dec-07 21:28

Paulraj G

20-Dec-07 21:28

hi everyone.....

am having my icon in system tray.......

if i right click the icon there should be some options...

how to add right click functions?

can help anyone?

thangs....

regards,
Paul.G

paulraj

Re: system tray - right click option

ashishbhatt20-Dec-07 21:47

ashishbhatt

20-Dec-07 21:47

If you are Win32 or not but you can make new resoure in which you can create new Menu and you can add it to that icon.

You can process that menu items by making window procedure to handle those menu messages.

Re: system tray - right click option

Paulraj G20-Dec-07 23:27

Paulraj G

20-Dec-07 23:27

hi...

can you tell somewhat briefly...

paulraj

Re: system tray - right click option

rajneshmalik21-Dec-07 0:32

rajneshmalik

21-Dec-07 0:32

try this http://rossm.net/Electronics/Computers/Software/C++/MFC.htm#TrayIcon[^]

Re: system tray - right click option

Mark Salsbery21-Dec-07 8:36

Mark Salsbery

21-Dec-07 8:36

When you add your tray icon with Shell_NotifyIcon(), specify
a window handle and a callback message along with the NIF_MESSAGE
flag.

When the window receives that message, check the LPARAM
for WM_RBUTTONUP or WM_CONTEXTMENU. If you receive the
message you want, you can use TrackPopupMenu to show a menu, or
display some other kind of UI.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

STL, or MFC's Array/List?

code_discuss20-Dec-07 20:42

code_discuss

20-Dec-07 20:42

I'm a Windows programmer and use MFC heavily. But in many forum/newsgroup STL seems to be a must have for a c++ programmer.
So I'm curious that should I use STL or MFC's array/list in my project?
STL seems to be a standard, but MFC's array/list fit in the MFC structure well.

Re: STL, or MFC's Array/List?

Christian Graus20-Dec-07 21:09

Christian Graus

20-Dec-07 21:09

MFC containers are crap, they were a stopgap until they had STL in their compiler, and remained as a legacy support thing. They should never be used unless you have a compelling reason, you should use STL by default.

Christian Graus - Microsoft MVP - C++

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: STL, or MFC's Array/List?

Rajith21-Dec-07 20:45

Rajith

21-Dec-07 20:45

Here are some performance readings which i took for CArray and std::vector

Time taken to add 1 million elements( unsigned long )

CArray = 2.7360s ( 2736 ms ) //Will be faster if you set the size using SetSize()
vector = 0.0210s ( 21 ms ) //Will be faster if you set the size using reserve()

CList = 0.0260s ( 26 ms )
std::list = 0.1220 ( 122 ms )

CMap = 0.0820 ( 82 ms ) // Used InitHashTable( 200017 ) or else it will take ages to add elements
stl::map = 0.0399 ( 399 ms )

Though STL is not as well structured or as easy to use as MFC but performance wise they win hands down.

Note: Will using STL access the elements using iterators. It will be very fast.

Encode/Decode audio/video using avcodec

Don Box20-Dec-07 20:02

Don Box

20-Dec-07 20:02

I'm first decoding, then encoding a .MP3 format. But it is not working properly. I wanna know how can we use avcodec to encode or decode a audio or video file?
Any help would be highly appreciated.

Come online at:-
jubinc@skype

static class member method confusion...

fantasy121520-Dec-07 19:30

fantasy1215

20-Dec-07 19:30

I know static class member method(or function) doesn't have this pointer, we should use static class member method like this:

<br />
CMyClass::staticMethod();<br />

but sometimes we'll forget it's a static class member method and do some miscorrect use like ordinary methods:

<br />
CMyClass obj;<br />
obj.staticMethod();<br />

Question NO.1:
Why doesn't the compiler tell me the errors?
Question NO.2:
If the compiler doesn't tell me these codes, do these code harm?
Question NO.3:
Why can't Search Message Boards by user now? I remember it could do so before this update of CP, I'd like to Search Message Boards by user to find if anybody answers my question before.

Re: static class member method confusion...

Cedric Moonen20-Dec-07 20:10

Cedric Moonen

20-Dec-07 20:10

1 and 2) Because it's perfectly legal to call a static function on a class instance. There's nothing wrong with it, and the code won't harm Smile | :)

Cédric Moonen
Software developer

Charting control [v1.2]

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