|
If you are using the Doc/View architecture, you can do some simple document writing:
void CYourDoc::Serialize(CArchive& ar)
{
if (ar.IsStoring()) {
ar << an_int
<< a_double
<< a_CString
<< a_short;
} else {
ar >> an_int
>> a_double
>> a_CString
>> a_short;
}
Make sure the order and size of the data you write is identical to the order and size of the data you read, otherwise kaboom. If you want to serialize your own classes, you need to inherit them from CObject. It is also a bit more complicated. Websearch for DECLARE_SERIAL, IMPLEMENT_SERIAL. These are macros that you will need to add to your class. Finally, when you actually write the code to do the serialization of your class objects, you will need to over-ride Serialize(...), which your class will inherit from CObject. In your Serialize(...) over-ride, you will implement the necessary code to write your class object to a file. It will be pretty much the same as the sample code above. So, e.g., your class has an int size; member variable, you will do ar << size; in your Serialize(...) over-ride.
Max
Max
|
|
|
|
|
Thanks. really appreciate it.
I know how to work with all the components individually.
the problem is putting all together in vc++ 6.0 as an application.
thanks anyways.
I got a pretty decent idea now.
Keshav Kamat 
India
|
|
|
|
|
Dear Friends,
I am using MSHFlexGrid control. And i want to merge two cells. Can anybody please help me to do that?
On MSDN I got one example but i m not able to use the same .
Help Need urgently.
Megha
|
|
|
|
|
Hey Guys,
Is it possible to display two fonts or more in the same CEdit control?
I need to display a price in a special format, something like this: 12.2536
Thanks in advance
|
|
|
|
|
No. There's no formatting information in the text of a standard edit control.
You can do it with a RichEdit control though.
Mark
"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder
|
|
|
|
|
|
you have to declare extern such variables in the header file
and define them in the proper cpp file, for instance:
extern int iGlobal;
in the header file and:
int iGlobal;
in one and only one cpp file.
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.
|
|
|
|
|
Thanks ....
CPallini wrote: you have to declare extern such variables in the header file.
This is going to sound stupid, but I have not yet done something like that, if you could be so kind, could you please give me an example ???
Many Thanks
Regards,
The only programmers that are better than C programmers are those who code in 1's and 0's.....
Programm3r
My Blog: ^_^
|
|
|
|
|
|
|
Thank you for the help CPallini, the explanation that you gave will also work for more than one header file and cpp file (Class - Base Classes [files]) ???
Regards,
The only programmers that are better than C programmers are those who code in 1's and 0's.....
Programm3r
My Blog: ^_^
|
|
|
|
|
Use
/force switch in linker option.
Come online at:-
jubinc@skype
|
|
|
|
|
Thanks for the reply, what would /force do ??
Regards,
The only programmers that are better than C programmers are those who code in 1's and 0's.....
Programm3r
My Blog: ^_^
|
|
|
|
|
/force sounds unwise, you should fix the problem by using extern in the headers and only defining the variables once. To see what /force does check the documentation.
I know that programming style and naming conventions are controversial, but global variables called i, n ??? How about something more descriptive?
Peter
"Until the invention of the computer, the machine gun was the device that enabled humans to make the most mistakes in the smallest amount of time."
|
|
|
|
|
cp9876 wrote: I know that programming style and naming conventions are controversial, but global variables called i, n ??? How about something more descriptive?
lol, I totally agree, but when pasting an example on the CP, I don't like using the full variable name
Regards,
The only programmers that are better than C programmers are those who code in 1's and 0's.....
Programm3r
My Blog: ^_^
|
|
|
|
|
Hi,
I am new to vc++.net (mfc),i need to know how to add data and column headers to the MSDATAGRID VERSION 6.0 dynamically IN vc++.Net(mfc application), Please Some one help me
Thanks in advance
Engilela
-- modified at 6:26 Friday 13th April, 2007
|
|
|
|
|
Hi all,
Take the following into consederation:
header file
class ftp :
public ftpHook
{
public:
int ftp_FileExists(LPSTR Filename);
LPSTR ftp_StrChr(LPSTR StringPtr, char Ch);
};
cpp file
#include "ftp.h"
int ftp::ftp_FileExists(LPSTR Filename)
{
Ptr = ftp_StrChr(PathBuffer+lstrlen((LPSTR)LocalDir)+1,':');
}
</code>
But I keep receiving the following error:
Error 1 error LNK2019: unresolved external symbol "public: char * __thiscall ftp::ftp_StrChr(char *,char)" (?ftp_StrChr@ftp@@QAEPADPADD@Z) referenced in function "public: int __thiscall ftp::ftp_FileExists(char *)" (?ftp_FileExists@ftp@@QAEHPAD@Z) ftp.obj
Can anyone please help me.
Many Thanks.
Regards,
The only programmers that are better than C programmers are those who code in 1's and 0's.....
Programm3r
My Blog: ^_^
|
|
|
|
|
|
Look, you make a call to ftp::ftp_StrChr [inside ftp::ftp_FileExists] but this function is not defined [it has no body]. So define that function.
--
======
Arman
|
|
|
|
|
|
hi all!!!
i have already split file by size eg. for window media format file (wmv/wma).
but now i want to split file by play length like suppose i take %age in the edit box
and it will parts that file with all equal size and remaining with the rest.
thanks in advance
|
|
|
|
|
The purpose of splitting is uncertain...
What's the problem? You have the file length and the persentage, so define the split position = (length*percent)/100. Or you wonder smth else?
--
======
Arman
|
|
|
|
|
hi! i've made a custom control button. the problem is when i click the button, the icon "disappears". when i switch to other window and back again to my app, the icon is displayed again. i think it doesnt repaint properly. here's my code in OnPaint(): It only happens in Windows 2000, not in Win XP
void CIconBitmapButton::OnPaint()
{
__super::OnPaint();
CDC* pDC = this->GetDC();
SendMessage(WM_ICONERASEBKGND, (WPARAM) pDC->GetSafeHdc(), 0);
RECT canvasArea;
GetClientRect(&canvasArea);
int iconX = 0;
int iconY = 0;
ICONINFO iconInfo;
GetIconInfo(this->m_hIcon, &iconInfo);
HDC hDC = pDC->m_hDC;
CBitmap* iconBitmap = CBitmap::FromHandle(iconInfo.hbmColor);
CBitmap* maskBitmap = CBitmap::FromHandle(iconInfo.hbmMask);
BITMAP iconSize;
iconBitmap->GetBitmap(&iconSize);
iconX = iconSize.bmWidth;
iconY = iconSize.bmHeight;
// NOTE: icon must be drawn with these coordinates
int buttonX = canvasArea.right/2 - iconX/2;
int buttonY = canvasArea.bottom/2 - iconY/2;
pDC->DrawIconEx(buttonX, buttonY, this->m_hIcon,0,0,0,brush, DI_IMAGE);
// if (m_stretch)
ReleaseDC(pDC);
DeleteDC(hDC);
iconBitmap->DeleteObject();
maskBitmap->DeleteObject();
// if (this->m_hIcon)
}
|
|
|
|
|
Seems there is a problem in last lines of the function. Don not call DeleteDC(hDC); the logic is that you do match a ReleaseDC per GetDC and this is all. Also you are wrapping a C++ object over iconInfo.hbmColor and iconInfo.hbmMask. These CBitmap objects are only temporary wrappers over underlying handles and thus do not call DeleteObject for them.
--
======
Arman
|
|
|
|
|
What I am looking to do is to provide the user (who runs my program) with a list of devices that they can pick from. You can do this with an Open File dialog if you click on "My Computer". What I want to know is how I can set up the dialog before the user opens it to prsent this list. How would you do this in C++? Have you seen it done before?
[IMG]http://i67.photobucket.com/albums/h292/Athono/_help.png[/IMG]
I want one of two (or both) solutions.
#1) I already have a custom File Open dialog program written where I am able to make sure that the user selects a directory and is not allowed to input a filename. Now I just want to know how to set up this estantiated FileOpen class so that it will first come up with the "My Computer" area showing.
OR
#2) I want to create a drop-down menu that only shows the devices for the user to pick from. In other words, just the C drive, the D drive, etc.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
