Design patterns for ADO SQL calls - C / C++ / MFC Discussion Boards

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Re: function does not do what i need

Erik Funkenbusch25-Jul-01 21:35

Erik Funkenbusch

25-Jul-01 21:35

You are confusing your source code with what is actually in memory.

\\ tells the *COMPILER* that you really want to use a single backslash. When the compiler sees two \\'s, it converts them to a single backslash in the actual code, just like \n is converted to a newline character in the actual code.

It will do not good to have a function which converts this, because when you type "C:\testdata" the compiler actually sees "C:<tab>estdata" (because the compiler converts a \t to a tab character).

Don't confuse compile-time substitutions with what is the compiled output.

Format a String in a EditBox

youssef23-Jul-01 4:10

youssef

23-Jul-01 4:10

Hi,

I would like to write a time (hh:mm:ss.ff) in a editbox.
I would like to enter only hh, mm, ss, ff.

Best regards

youssef

Re: Format a String in a EditBox

Not Active23-Jul-01 5:42

Not Active

23-Jul-01 5:42

What you need is a masked edit control. There are some examples here and on other sites.

Active-X Control Redrawing

Jared Allen23-Jul-01 3:33

Jared Allen

23-Jul-01 3:33

I'm having some trouble with screen flickering when the browser window (or active X test control container) is scrolled.

It is really quiet bad, Is ther any way to get better redrawing? with less flickering? I've tried some double buffering but it doesn't seem to work. Especially with the CDC that the OnDraw function gives me.

It is an MFC base Active X control.
Any ideas, would be great

thanks,
JAred.

Re: Active-X Control Redrawing

23-Jul-01 3:53

try overriding the WM_ERASEBKGND. It might help.. If the control is in the whole window

Re: Active-X Control Redrawing

23-Jul-01 14:14

Hi, thanks for the reply, But I've already done that, and it doesn't seem to make much of an improvement with or without it.

The main flickering occures when the container window (IE) is scrolled or resized.
I'm not sure what else to do, or if this is a common problem.

Jared

Customised CFileDialog

Vikas Rao23-Jul-01 3:10

Vikas Rao

23-Jul-01 3:10

Hi,
I want to attach a small Dialog Box which I have built through resources to a CFileDialogBox() and then use it. How can I do it.?

Vikas
Smile | :)

Design patterns for ADO SQL calls

Reno Tiko23-Jul-01 3:09

Reno Tiko

23-Jul-01 3:09

I was looking at my code and noticed a bunch of SQL calls in the middle of some of the business logic, and thought that they needed some cleaning up and refactoring. I was wondering if there was a design pattern of some sort that would be useful here.

Basically I'm looking for something that would work similar to the flat file serialization offered by inheriting from CObject and using CArchive to serialize the class, but am looking to instead serialize to a database.

Also, is there a framework of some sort available that supports class <-> ADO database.

Thanks!

Events...

23-Jul-01 2:43

Hello

how can set event at run- time for controls? for example: if i create a button at run-time, how do i "tell" it what to do when is will be clicked?

thanks

RG
Smile | :)

Re: Events...

23-Jul-01 4:07

Implement a class derived form CButton and the override the BN_CLICKED message in there. Create the object of this class then at runtime.

I hope u get this and it works;)

EXE used as DLL?

Danoo23-Jul-01 2:22

Danoo

23-Jul-01 2:22

I have a stand-alone application which exports a class.
How can I load this exe-file statically like a normal dll? I need to create somehow the CDynlinkLibrary object to initialize the runtime-class stack...
Confused | :confused:

How to change a variable to hexadecimal format ???

22-Jul-01 23:29

Re: How to change a variable to hexadecimal format ???

jerry0davis22-Jul-01 23:39

jerry0davis

22-Jul-01 23:39

int a = 10;
printf("a(dec) = %d\n", a);
printf("a(hex) = %X\n", a);
will output

10<br />
a

Thank you . But I didn't want to print it . I only want to save it in a file

23-Jul-01 6:48

I look for a function that doing it

Re: Thank you . But I didn't want to print it . I only want to save it in a file

markkuk23-Jul-01 11:48

markkuk

23-Jul-01 11:48

Hexadecimal, octal and decimal representations of numbers are used only when the number is converted to text for reading by humans. The computer always handles the number as binary.

If you want to save it in a text file as hexadecimal, use the fprintf function instead of printf.

About how to delete object

prog758422-Jul-01 23:04

prog7584

22-Jul-01 23:04

i wrote some code in destructor for the purpose of deletion after object have been used.
by the way, error is occured in "delete pObject" sentence.
i don't know why the sentence is happened.

the code is like the following.

********************************************************************************

CPerson::~CPerson()
{
for(int i=0; i< m_PtArray.GetSize(); i++) // m_PtArray is CObArray type.
{
CObject* pObject = (CObject*)m_PtArray.GetAt(i);
delete pObject;
}

m_PtArray.RemoveAll();
}

********************************************************************************

have a nice day Smile | :)

Re: About how to delete object

Christian Graus23-Jul-01 0:28

Christian Graus

23-Jul-01 0:28

Why do you need to do the case ? Is it not a CObject * already ? If it isn't, then surely the wrong destructor is going to be called ?

Also, have you tried going in reverse order ?

Christian

#include "std_disclaimer.h"

The careful application of terror is also a form of communication.

Eagles may soar, but weasels don't get sucked into jet engines.

Re: About how to delete object

Hrishi23-Jul-01 11:16

Hrishi

23-Jul-01 11:16

Try:

CObject* pObject
for(int i=0; i< m_PtArray.GetSize(); i++) {
pObject = NULL;
pObject = (CObject*)m_PtArray.GetAt(i);
if(pObject)delete pObject;
}

Out of memory

Hadi Rezaee22-Jul-01 21:50

Hadi Rezaee

22-Jul-01 21:50

Hi all,
I'm writing program about database.
In my database i have 3 tables:

CDINFO, PERSON, GETGIVE

And i have 3 fields in CDINFO table:

FILMNAME ---> Text
FILMCODE ---> Integer
COUNT ---> Integer

I'm using of three objects of CDaoRecordset for opening each table ...
Now, i want to add new record in CDINFO:

COleVariant var;
char *szFilm = new char[50];
var.vt = VT_INT;

GetDlgItemText(IDC_EDIT1, szFilm, 50);
var.intVal = GetDlgItemInt(IDC_EDIT2);

m_rsCDINFO->AddNew();
m_rsCDINFO->SetFieldValue("FILMCODE", var);
m_rsCDINFO->SetFieldValue("FILMNAME", szFilm);
m_rsCDINFO->SetFieldValue("COUNT", var);
m_rsCDINFO->Update();

SetDlgItemText(IDC_EDIT1, "");
SetDlgItemText(IDC_EDIT2, "");

delete[] szFilm;

This code have not any error or warning, but when i'll running this code, program indicate to me error about: "Out of memory" !!!
Please tell me, what is my wrong ?

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Use Image in Dll

22-Jul-01 21:11

I need to put a jpeg in a dialog , i used a CImgEdit .
when i use it in a regular mfc application it's working good,
but when i use it in a dll ( the same application but i changed it
from Exe to Dll ) it isn't working.

can someone help me ?

Thanks.

How can I get TextToSpeech API's?

22-Jul-01 21:04

Hello all, I want to use microsoft's text to speech, to let my software speek, but I don't know how and where to get TextToSpeech API, can you help me?

Re: How can I get TextToSpeech API's?

Mark Terrano30-Jul-01 14:14

Mark Terrano

30-Jul-01 14:14

http://www.microsoft.com/speech/
Tons of documents, downloads, and links from there. Good luck.

Who know CHM help file format

inforix22-Jul-01 20:37

inforix

22-Jul-01 20:37

I am developing a chm help file tool, so I need a specification for .chm file, but I cannot find it in microsoft.com, any help? Cry | :((

Thanks!

Re: Who know CHM help file format

Reid23-Jul-01 13:46

Reid

23-Jul-01 13:46

What is the purpose of the .chm file? Is is specific to a particular program or something? That info sure would help me help you.... Smile | :)

-Reid the C++/C# programmer
(Caution: I am a teenager, and that means that I think I know everything...but probably don't...)
Maybe this will help you understand:

CPerson Reid = "Teenager";
CPerson All_C_Programmers[9999999999];
int i;
int num_Programmers_That_Are_Teenagers = 0;
for (i=0;i<9999999999;i++)
{
if (All_C_Programmers[i]=="Teenager")
{
num_Programmers_That_Are_Teenagers++;
}
}
cout << num_Programmers_That_Are_Teenagers;
-------------
1 <------

learn visual c++

22-Jul-01 20:22

how can i learn visual c++ in ashort way or in the long way
but not in along time.where can i get exampels an stuff?
thank you for your help

itai

Last Visit: 31-Dec-99 18:00 Last Update: 25-Sep-24 10:25

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