C / C++ / MFC Discussion Boards

Re: FindNextFile() ???

Carlos Antollini22-May-02 3:52

Carlos Antollini

22-May-02 3:52

Is better in that mode:

int Size;
CFileFind finder;
CString FileType("*.TYP");
finder.FindFile(FileType)
while(Found)
{
  Found = finder.FindNextFile();
  Size = finder.GetLength();
}

Olways when you need to know any propiertie of a file that you found, you need to do FindNextFind

Best Regrds

Carlos Antollini.
www.wanakostudios.com
Sonork ID 100.10529 cantollini

Re: FindNextFile() ???

Mike Osbahr22-May-02 4:27

Mike Osbahr

22-May-02 4:27

Carlos Antollini wrote:

int Size;
CFileFind finder;
CString FileType("*.TYP");
finder.FindFile(FileType)
while(Found)
{  
  Found = finder.FindNextFile();
  Size = finder.GetLength();
}

Hi Carlos,
Looking things over I think we both left some issues dangling. Let me try one more time:

BOOL Found;
CFileFind finder;
CString FileType("*.TYP");
Found = finder.FindFile(FileType)
while(Found)
{  
  Found = finder.FindNextFile();
  Size = finder.GetLength();
}

When Found changes to false is finder still valid? I can never remember exactly how that works.

>>>-----> MikeO

Re: FindNextFile() ???

Carlos Antollini22-May-02 4:42

Carlos Antollini

22-May-02 4:42

Mike Osbahr wrote:
When Found changes to false is finder still valid? I can never remember exactly how that works.

Yes is true...
When you need to ask about any property of the file that you found, like name, size, extension, attributes, you before must to do FindNextFile. You dont must worry about the result of FindNextFile...

For example in the MSDN read the Remarks section of CFileFind::GetFilePath,

Regards

Carlos Antollini.
www.wanakostudios.com
Sonork ID 100.10529 cantollini

Re: FindNextFile() ???

C^hris L^osinger22-May-02 3:54

C^hris L^osinger

22-May-02 3:54

from http://www.codeproject.com/file/sadirread.asp

WIN32_FIND_DATA FindFileData;
HANDLE hFind;
if ((hFind = FindFirstFile(fullPath, &FindFileData))!=INVALID_HANDLE_VALUE)
{
    // we only care about files, not subdirs
    if ((FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)!=FILE_ATTRIBUTE_DIRECTORY) 
     {
        size = ((unsigned __int64)FindFileData.nFileSizeHigh * ((unsigned __int64)MAXDWORD+1)) + (unsigned __int64)FindFileData.nFileSizeLow;
     }
}

and, of course the FindNextFile loop comes right below this.

-c

Cheap oil. It's worth it!

ISEffects - effects for images

Re: FindNextFile() ???

Carlos Antollini22-May-02 4:27

Carlos Antollini

22-May-02 4:27

Is the Following better?

int nSize;
CFileFind finder;
CString FileType("*.TYP");
finder.FindFile(FileType)
while(Found)
{
  Found = finder.FindNextFile();
  if(finder.IsDots() || finder.IsDirectory())
    continue;
  nSize = finder.GetLength();
}

Cheers

Carlos Antollini.
www.wanakostudios.com
Sonork ID 100.10529 cantollini

Re: FindNextFile() ???

C^hris L^osinger22-May-02 4:39

C^hris L^osinger

22-May-02 4:39

not if the original poster wants to use FindNextFile, not CFileFinder.

-c

Cheap oil. It's worth it!

ISEffects - effects for images

Re: FindNextFile() ???

Carlos Antollini22-May-02 4:45

Carlos Antollini

22-May-02 4:45

Chris.
Yes is true...
The original message doesn't specify if he wants to use CFindFile::FindNextFile or ::FindNextFile...
You have the true, I don't why but always I think in MFC... Big Grin | :-D

Regards....

Carlos Antollini.
www.wanakostudios.com
Sonork ID 100.10529 cantollini

Re: FindNextFile() ???

C^hris L^osinger22-May-02 4:46

C^hris L^osinger

22-May-02 4:46

and i always think in standard C. i originally did this with _findfirst, _findnext. i didn't even know there was a CFindFile class. Smile | :)

-c

Cheap oil. It's worth it!

ISEffects - effects for images

GetDc() - returns NULL why ?

Aizik Yair22-May-02 3:01

Aizik Yair

22-May-02 3:01

Hi all ,
outside of OnPaint()I call in other function CDc* pDc = GetDc().
Sometimes its returns NULL.
Why?????????

Aizik Yair
Software Engineer

Re: GetDc() - returns NULL why ?

Aizik Yair22-May-02 3:36

Aizik Yair

22-May-02 3:36

I found the reason.
I need call ReleaseDc() each time i use GetDC()

Aizik Yair
Software Engineer

Default Exit Funcition in WinApp

Asim Hussain22-May-02 2:37

Asim Hussain

22-May-02 2:37

I have changed some the default menu settings in my app, but now the Exit button does not work. I did remap it but thats because I wanted to do some cleaning up before it exited.

I thought the default behaviour was to map to WinApp::ExitInstance but that doesn't work.

does anyone know the default Exit function which VisC++ automatically maps the Exit button to.

cheers

Asim.

.........
I'd rather be rich than stupid.

Re: Default Exit Funcition in WinApp

Joaquín M López Muñoz22-May-02 2:36

Joaquín M López Muñoz

22-May-02 2:36

The default exit process is triggered by sending WM_CLOSE to the main frame window (this is what CWinApp:OnExitApp does.)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Default Exit Funcition in WinApp

Nish Nishant22-May-02 3:35

Nish Nishant

22-May-02 3:35

AfxGetMainWnd()->PostMessage(WM_CLOSE);

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Passing two dimensional array as parameter??

tongc22-May-02 1:45

tongc

22-May-02 1:45

Hi All

As a newbie in C++, particularly in MFC, i'm strggling about how to pass the 2 dimensional array as parameter by reference and manipulate it through a void method. I want to pass a 4x4 two dimensional array to a method which the implementation looks like this:

void Group::GetResults(int& res[4][4])
{
	for(int i = 0 ; i < 4; i++)
	{
		res[i][i] = result[i][i];
	}
}

as you can see i want to change the values of the 2 dimensional array passed in to a local 2 dimensional array in the local class which is the result

And this is how i use it in the view class:

int tempArray[4][4]
GetResult(tempArray)

thanks for reading this.
Regard

Re: Passing two dimensional array as parameter??

Alexandru Savescu22-May-02 2:09

Alexandru Savescu

22-May-02 2:09

You can pass int** like this

void Group::GetResults (int** a, int n /* to know the size */)
{
  for (int i = 0; i < n; i++)
  {
    res[i][i] = result[i][i];
  }
}

and then use it like this:

int a[4][4];
GetResult (a);

Best regards,
Alexandru Savescu

Re: Passing two dimensional array as parameter??

tongc22-May-02 2:14

tongc

22-May-02 2:14

hi alex

i did the way that u guided me but this is the error that i got

E:\Documents and Settings\Administrator\My Documents\ST2\Assignment3\ass3_q1\ass3_q1View.cpp(319) : error C2664: 'GetResults' : cannot convert parameter 1 from 'int (*)[4][4]' to 'int ** '

any idea??

Cheers Smile | :)

Re: Passing two dimensional array as parameter??

Alexandru Savescu22-May-02 2:32

Alexandru Savescu

22-May-02 2:32

It compiles fine on my computer, send me a sample and I'll tell you what is wrong.

Best regards,
Alexandru Savescu

Re: Passing two dimensional array as parameter??

Alexandru Savescu22-May-02 2:37

Alexandru Savescu

22-May-02 2:37

Actually it doesn't Frown | :(

Take Joaquin advice!

Best regards,
Alexandru Savescu

Re: Passing two dimensional array as parameter??

Joaquín M López Muñoz22-May-02 2:34

Joaquín M López Muñoz

22-May-02 2:34

void Group::GetResults(int res[][4])
{
...
}

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Passing two dimensional array as parameter??

tongc22-May-02 2:46

tongc

22-May-02 2:46

it gives me error this way too! Frown | :-(

Is that how you pass 2 dimensionals array??

Re: Passing two dimensional array as parameter??

Joaquín M López Muñoz22-May-02 2:49

Joaquín M López Muñoz

22-May-02 2:49

I'm pretty much sure it works, cause I've tried it. Maybe you could post your code to see the differences.

PS. Do you have an extra & in the argument?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Passing two dimensional array as parameter??

tongc22-May-02 3:06

tongc

22-May-02 3:06

ok here it comes

pDoc->A.GetResults(result[][4]); // this is what i follow you guide.

and this is my implementation:

void Group::GetResults(int res[][4])
{
	for(int i = 0 ; i < 4; i++)
	{
		res[i][i] = result[i][i];
	}
}

Thanks

Re: Passing two dimensional array as parameter??

tongc22-May-02 3:08

tongc

22-May-02 3:08

and this is error i get

E:\Documents and Settings\Administrator\My Documents\ST2\Assignment3\ass3_q1\ass3_q1View.cpp(319) : error C2059: syntax error : ']'

Thanks

Re: Passing two dimensional array as parameter??

Alexandru Savescu22-May-02 3:04

Alexandru Savescu

22-May-02 3:04

You should call it like this: pDoc->A.GetResults (result);

Best regards,
Alexandru Savescu

Best regards,
Alexandru Savescu

Re: Passing two dimensional array as parameter??

tongc22-May-02 3:17

tongc

22-May-02 3:17

oh, that's right! I didn't notice that, probaly after a busy day Smile | :)

. Thanks alot for your help Alex and Joan.

Best Regard

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