C / C++ / MFC

Re: Read-Write specific Excel cases in C++

30-Oct-07 3:18

Using Excel Automation is by far the easiest method.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

J_E_D_I30-Oct-07 3:24

J_E_D_I

30-Oct-07 3:24

Sorry could you please elaborate. I've never heard of that..

Re: Read-Write specific Excel cases in C++

David Crow30-Oct-07 3:26

30-Oct-07 3:26

See here.

Check for Eof

gReaen29-Oct-07 22:49

gReaen

29-Oct-07 22:49

How do i check for Eof using a CFile object?????

Re: Check for Eof

Naveen29-Oct-07 22:56

Naveen

29-Oct-07 22:56

gReaen wrote:
How do i check for Eof using a CFile object?????

When the EOF is reached, the Read() function will return 0.

nave

[OpenedFileFinder]

Re: Check for Eof

David Crow30-Oct-07 3:20

To get user input from a window.

30-Oct-07 3:20

Naveen.R wrote:
When the EOF is reached, the Read() function will return...

...a count less than what was asked for, not just 0.

713minchi29-Oct-07 22:46

713minchi

29-Oct-07 22:46

I want to create a window through which a user can input say two numbers and this data is to be displayed after some manipulations on a seperate window in a grid. I am new to use VC++ don't know much about MFC. Can anyone give me an idea how should I start...Thank you

Nishad S29-Oct-07 23:34

Nishad S

29-Oct-07 23:34

You can do it in a dialog based application. Use two edit controls to get the data.

But what do you meant by "separate window in a grid"?

- NS -

713minchi31-Oct-07 1:10

713minchi

31-Oct-07 1:10

Sorry I wasn't clear about the grid part...What I meant was like suppose it's the location of two points then to represent it on a X-Y plane...

Nishad S31-Oct-07 1:14

Nishad S

31-Oct-07 1:14

Means you need to show a point in graph like control? Then you may have to go for a custom control.

- NS -

Hamid_RT30-Oct-07 0:37

Hamid_RT

30-Oct-07 0:37

And these editbox must set to number on the property window of editbox.do you want to send result to other window?

713minchi31-Oct-07 1:15

713minchi

31-Oct-07 1:15

yeah...actually to represent it as in on X-Y plane if the inputs are the locations of a point...

Hamid_RT31-Oct-07 4:15

Hamid_RT

31-Oct-07 4:15

For show value on the editbox you can use of SetWindowText.

David Crow30-Oct-07 3:22

Playing AVI directly that is inside in a bigger data file

30-Oct-07 3:22

713minchi wrote:
I want to create a window...

If this window is to be created at runtime, use CreateWindow().

sdancer7529-Oct-07 22:06

sdancer75

29-Oct-07 22:06

Hi,

Is that possible to use MCIWnd or any other Lib to play an avi file that is part of a bigger data file and the starting disk offset is known ?

For example I am trying to make this

copy /b text.txt+movie.avi final.dat /b

This creates a new binary file that is the joint of the files text.txt and movie.avi. I know that text.txt is 10 bytes long and in the 11th byte it starts the AVI movie. Is that possible to play it directly (without extracting it) within final.dat ?

Regards,

sdancer75

Re: Playing AVI directly that is inside in a bigger data file

Neo Andreson30-Oct-07 20:22

Neo Andreson

30-Oct-07 20:22

i think DirectShow can help you to do the same.

Images serialization

aolihu29-Oct-07 21:42

aolihu

29-Oct-07 21:42

Hi,
I wanna make a serialization class in MFC, the class include CString,int,Images(GIF). I am wondering if MFC provides some kind of binary stream function for Images de-/serialization. For me, how to the serialize Images a headache problem. Could any one help me ...
Thanks ,
zran

zran

Paresh Chitte29-Oct-07 21:47

Paresh Chitte

29-Oct-07 21:47

Will CArchive class helpful ?

Regards,
Paresh.

Re: Images serialization [modified]

aolihu29-Oct-07 22:51

aolihu

29-Oct-07 22:51

Thanks,
In my opinion CArchive only support TEXT Data like 'CString' 'char' 'int' etc. Images(GIF) is binary Data...
ps: I use vc++6

Nelek29-Oct-07 23:43

Nelek

29-Oct-07 23:43

You can use CFile, but actually the CArchive can deal with what you need. At last... all data can be stored like BYTES, the content or the meaning of every byte depends on your serialize function and whatever order you use to write / read datas

You can send the value of a variable in int/double format, the content of a string, coordinates of CPoint about positions on the screen or about a graphic, (or about your question) values or RGB pixels with a fixed order (btw, a picture can be understood as a matrix of pixels with a value for the color in every position)

-- modified at 6:33 Tuesday 30th October, 2007

aolihu9-Nov-07 3:48

aolihu

9-Nov-07 3:48

Nelek, Thanks for u advice.The key of the problem is how to deal with picture and binary stream. I used GDI+ Library and got the answer smoothly.
Part of code below:
///////////////begin/////////////////
if(ar.IsStoring()){
HGLOBAL m_hMem = GlobalAlloc(GMEM_MOVEABLE, 0);
IStream *pstm=NULL;
CreateStreamOnHGlobal(m_hMem, TRUE, &pstm);
CLSID clsid;
USES_CONVERSION;
GetCodecClsid(A2W("image/jpeg"), &clsid);
m_pImage->Save(pstm,&clsid,NULL);
if (pstm==NULL)
return;
LARGE_INTEGER liBeggining = { 0 };
pstm->Seek(liBeggining, STREAM_SEEK_SET, NULL);
DWORD wTemp=GlobalSize(m_hMem);
LPBYTE lpData = (LPBYTE)GlobalLock(m_hMem);
ar << wTemp;
ar.Write(lpData,wTemp);
pstm->Release();
GlobalUnlock(m_hMem);
}
else{
DWORD wTemp;
ar >> wTemp;
HGLOBAL m_hMem = GlobalAlloc(GMEM_FIXED, wTemp);
if (m_hMem == NULL)
return;
IStream *pstm=NULL;
CreateStreamOnHGlobal(m_hMem,FALSE,&pstm);
if (pstm==NULL)
return;
BYTE* pmem = (BYTE*)GlobalLock(m_hMem);
ar.Read(pmem,wTemp);
if (m_pImage) {
delete m_pImage;
m_pImage = NULL;
}
using namespace Gdiplus;
if (m_pImage!=NULL)
{
delete m_pImage;
m_pImage=NULL;
}
m_pImage = Image::FromStream(pstm, FALSE);
pstm->Release();
GlobalUnlock(m_hMem);
}
//////////////end////////////////// Smile | :)

In my application, i use a CWebBrowser control to display the content from a serialize file. There is a new question to me, how to load 'm_pImage'? Confused | :confused:

Could you give me more suggestion, Thanks for anything...