C / C++ / MFC Discussion Boards

Re: What is wrong with this?

Naveen26-Jun-06 3:52

Naveen

26-Jun-06 3:52

u didn't see this?

http://www.codeproject.com/script/comments/forums.asp?msg=1548920&forumid=1647#xx1548920xx[^]

nave

Re: What is wrong with this?

Sarath C26-Jun-06 4:25

Sarath C

26-Jun-06 4:25

Actually, in his code, there's no allocation...

so how do we know what's happening outside. could you pls explain it?

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: What is wrong with this?

James R. Twine26-Jun-06 5:00

James R. Twine

26-Jun-06 5:00

You are missing the point of the post. The problem is that if you ever catch that exception, you should never try to handle it in the way that the snippet demonstrates.

There are only two reasons to get that exception (ignore the fact that some developers call AfxThrowMemoryException() for the wrong reasons): [1] A heap request cannot be allocated due to an out of memory condition, and [2] the heap is corrupted and Thinks it is out of memory Smile | :)

.

For either case, you probably should not be then trying to allocate memory again.

Peace!

-=- James

If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
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Re: What is wrong with this? [modified]

ovidiucucu26-Jun-06 5:06

ovidiucucu

26-Jun-06 5:06

Well, sometime happens. Making confusion between heap and stack, we are in a hurry calling others "stupid" then abort (call AfxAbort). Smile | :)

Ovidiu Cucu
Microsoft MVP - Visual C++

Re: What is wrong with this?

James R. Twine26-Jun-06 4:42

James R. Twine

26-Jun-06 4:42

Of course I do...

Peace!

-=- James

Re: What is wrong with this?

Chris Meech26-Jun-06 4:25

Chris Meech

26-Jun-06 4:25

I can just see a developer, patting himself on the back with having put together an exception handler and then stress testing to see it invoked and wondering why the messagebox is never displayed.

This is a really good example of not seeing the forest for the trees solution to a problem. Smile | :)

Chris Meech

I am Canadian. [heard in a local bar]

When no one was looking, every single American woman between the ages of 18 and 32 went out and got a tatoo just above their rumpus. [link[^]]

how we caan add files to listbox

happy_ram26-Jun-06 1:18

happy_ram

26-Jun-06 1:18

if we select the folder automatically all the files in the folder should be loaded in the listbox.iam able to select the folder but i don't know how to get the total number of files in folder and how to load this files into listbox,
please help me,
sree.

Re: how we caan add files to listbox

Hamid_RT26-Jun-06 1:25

Hamid_RT

26-Jun-06 1:25

if you want to get files or folders if you use ListBox see DlgDirList and use m_ListBox.GetCount()

whitesky

Re: how we caan add files to listbox

happy_ram26-Jun-06 1:34

happy_ram

26-Jun-06 1:34

actually my intension just like winamp application,in winamp we have two option add file or add folder.i write for files and i get a problem when i dealing with folders.
how we select the folder and how to add contentsof that folder to listbox.
thank u,
please help me,urgent .
sree

Re: how we caan add files to listbox

Sarath C26-Jun-06 1:31

Sarath C

26-Jun-06 1:31

here is the sample snippet

CFileFind finder;
 BOOL bWorking = finder.FindFile("*.*"); // give full path, else it will search in the current directory
 while (bWorking)
 {
    if (finder.IsDots())
       continue;

    // if it's not a directory, add it
    if (!finder.IsDirectory())
    {
        bWorking = finder.FindNextFile();
        m_ListBox.AddString((LPCTSTR) finder.GetFileName());
    }
 }

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: how we caan add files to listbox

Sarath C26-Jun-06 1:33

Sarath C

26-Jun-06 1:33

Another way to do the same thing

// The pointer to my list box.
extern CListBox* pmyListBox;

// Add all the files and directories in the windows directory.
TCHAR lpszWinPath[MAX_PATH], lpszOldPath[MAX_PATH];
::GetWindowsDirectory(lpszWinPath, MAX_PATH);

::GetCurrentDirectory(MAX_PATH, lpszOldPath);
::SetCurrentDirectory(lpszWinPath);

pmyListBox->ResetContent();
pmyListBox->Dir(DDL_READWRITE|DDL_DIRECTORY, _T("*.*"));

::SetCurrentDirectory(lpszOldPath);

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: how we caan add files to listbox

Sarath C26-Jun-06 1:34

Sarath C

26-Jun-06 1:34

Modify

SaRath C wrote:
::GetWindowsDirectory(lpszWinPath, MAX_PATH);

with your selected path

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: how we caan add files to listbox

happy_ram26-Jun-06 1:46

happy_ram

26-Jun-06 1:46

first of all i add the files using follwing code

	POSITION currPos;


	char strFilter[] = { "Mp3 files (*.mp3)|*.mp3|All Files (*.*)|*.*||" };

	CFileDialog avi(TRUE, ".mp3",NULL,OFN_ALLOWMULTISELECT | OFN_HIDEREADONLY, strFilter);

    char drive[_MAX_DRIVE], middle[_MAX_PATH], filename[_MAX_FNAME], ext[_MAX_EXT];


     if(avi.DoModal() == IDOK)
	 { 

   currPos = avi.GetStartPosition();

     while(currPos != NULL)            
					
	 {
  m_SongName = avi.GetNextPathName(currPos);
_splitpath (m_SongName, drive, middle, filename, ext);
m_list7.AddString(m_SongName);

so tell atleast what modufication i should do to ad folder

Re: how we caan add files to listbox

Sarath C26-Jun-06 2:07

Sarath C

26-Jun-06 2:07

Use SHBrowseFolder for selecting folder.

it is easy to modify the snippet i have given.

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: how we caan add files to listbox

happy_ram26-Jun-06 2:11

happy_ram

26-Jun-06 2:11

ok!
how we use SHBrowseFolder it,
i know iam disturbing u,
really sorry,
but my work demands me please,
beacuse it is urgent,
sree.

Re: how we caan add files to listbox

Naveen26-Jun-06 2:23

Naveen

26-Jun-06 2:23

sree_as wrote:
how we use SHBrowseFolder it,

CString csFolderSelected;
BROWSEINFO bi = {0};
bi.ulFlags = BIF_RETURNONLYFSDIRS ;
LPITEMIDLIST pIt;
if( (pIt = SHBrowseForFolder( &bi )))
{
TCHAR tcPath[ MAX_PATH ];
if( SHGetPathFromIDList( pIt, tcPath ))
{
csFolderSelected = tcPath;
AfxMessageBox( "the user selected the folder " + csFolderSelected );
}
}

nave

Re: how we caan add files to listbox

Sarath C26-Jun-06 2:27

Sarath C

26-Jun-06 2:27

After this,

TCHAR lpszOldPath[MAX_PATH];
::GetCurrentDirectory(MAX_PATH, lpszOldPath);
::SetCurrentDirectory(csFolderSelecter);

pmyListBox->ResetContent();
pmyListBox->Dir(DDL_READWRITE|DDL_DIRECTORY, _T("*.mp3"));

::SetCurrentDirectory(lpszOldPath);

This will work fine Smile | :)

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: how we caan add files to listbox

vasusree26-Jun-06 3:03

vasusree

26-Jun-06 3:03

Thnak u sararth and naveen,
really it is working very nice,
thank u very much.
this is my friend login id because system has failed.
so iam sending message from my friend system.
thank u,
finally simple problem if i like to add items to listctrl instead of Listbox,
Dir function is not availble for that
what should i do

Re: how we caan add files to listbox

Sarath C26-Jun-06 3:49

Sarath C

26-Jun-06 3:49

Use the first method I specified.

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: how we caan add files to listbox

Sarath C26-Jun-06 3:50

Sarath C

26-Jun-06 3:50

http://www.codeproject.com/script/comments/forums.asp?msg=1548776&forumid=1647#xx1548776xx[^]

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

function WM_ERASEBKGND

yogendra kaushik26-Jun-06 1:16

yogendra kaushik

26-Jun-06 1:16

plz tell me where i found the function WM_ERASEBKGND to change color
in clas wizard
OnEraseBkgnd(CDC *pDC)

Please mail me

Re: function WM_ERASEBKGND

Sarath C26-Jun-06 1:23

Sarath C

26-Jun-06 1:23

1. Go to Class Wizard and select required the message from the class (make sure that you have selected correct class) "Add Handler" there
2. Right click on the class and select "Add Message Handler"

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: function WM_ERASEBKGND

yogendra kaushik26-Jun-06 1:31

yogendra kaushik

26-Jun-06 1:31

sir i am sorry what i dont understand
when i go to class wizard there is no function WM_ERASEBKGND
plz help me

Please mail me

Re: function WM_ERASEBKGND

Sarath C26-Jun-06 1:35

Sarath C

26-Jun-06 1:35

How you are created you app? using classwizard?

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: function WM_ERASEBKGND

yogendra kaushik26-Jun-06 1:38

yogendra kaushik

26-Jun-06 1:38

i made a dialog based application
and now i want to change my dialog box color
i know that WMPAINT work for this what i want to use WM_ERASEBKGND
could it be possible

Please mail me

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