Re: First-chance exception CFileDialog - C / C++ / MFC Discussion Boards

Re: First-chance exception CFileDialog

David Crow13-Apr-06 9:43

David Crow

13-Apr-06 9:43

RobJones wrote:
...it takes between 2 and 10 times of opening the dialog and clicking OK before it will crash.

Which OK button, the one on your dialog, or the one on the File Open dialog?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: First-chance exception CFileDialog

RobJones13-Apr-06 10:23

RobJones

13-Apr-06 10:23

Sorry I ment to say the 'Open' button on the CFileDialog..

Whoever said nothing's impossible never tried slamming a revolving door!

Re: First-chance exception CFileDialog

RobJones13-Apr-06 9:01

RobJones

13-Apr-06 9:01

It appears that m_ldFile.GetPathName() is causing the issue...

Whoever said nothing's impossible never tried slamming a revolving door!

Re: First-chance exception CFileDialog

David Crow13-Apr-06 9:41

David Crow

13-Apr-06 9:41

So if you commented out everything in between these two statements, would the exception persist:

/*
CStdioFile file(strFilePath, CFile::modeRead | CFile::shareDenyNone);
...
m_strStatus.Format(_T("Count: %d"), m_strStringList.GetCount());
*/

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: First-chance exception CFileDialog

RobJones13-Apr-06 10:22

RobJones

13-Apr-06 10:22

Yeah, I think the part that is actually throwing the exception is m_ldFile.GetPathName() but I don't know why. The following trows the exception but if I remark out the m_ldFile.GetPathName() the exception stops.

static char BASED_CODE szFilter[] = _T("Text File (*.txt)|*.txt||");
CFileDialog m_ldFile(TRUE, _T(".txt"), NULL, OFN_HIDEREADONLY, szFilter);

if (m_ldFile.DoModal() == IDOK)
{
	CString strFilePath	= m_ldFile.GetPathName();
}

Whoever said nothing's impossible never tried slamming a revolving door!

Re: First-chance exception CFileDialog

David Crow13-Apr-06 10:42

David Crow

13-Apr-06 10:42

RobJones wrote:
CString strFilePath = m_ldFile.GetPathName();

You might put a breakpoint on this statement and step into the GetPathName() method to get the exception narrowed down a bit further.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: First-chance exception CFileDialog

georgeraafat13-Apr-06 7:48

georgeraafat

13-Apr-06 7:48

If you are using Visual Studio 8, enable breaking on first change exceptions in the debugger.
You can do that by going to Debug->Exceptions, expanding the Win32 Exceptions node and marking the ones you care about.
This will let the debugger stop where it's happening so you can narrow down the probelm.

gmileka

Re: First-chance exception CFileDialog

RobJones13-Apr-06 8:06

RobJones

13-Apr-06 8:06

I set the 0xC0000005 to break and it still doesn't really show anything it just goes directly into disassembly.

I did notice that I have to display the file dialog 2 times in order for the crash to happen.

I'm off to do some more testing...

Whoever said nothing's impossible never tried slamming a revolving door!

Re: First-chance exception CFileDialog

georgeraafat13-Apr-06 8:26

georgeraafat

13-Apr-06 8:26

You should be able to see the call stack - and narrow it down to the call originating from your code (Debug->Windows->Call Stack while app is running under the debugger).

gmileka

Re: First-chance exception CFileDialog

RobJones13-Apr-06 8:44

RobJones

13-Apr-06 8:44

The only thing it shows in the call stack is:

shell32.dll!7ca51406()

In the quick watch it shows 7CA51406 = CXX0013: Error: missing operator

Whoever said nothing's impossible never tried slamming a revolving door!

-- modified at 14:50 Thursday 13th April, 2006

Re: First-chance exception CFileDialog

RobJones13-Apr-06 10:46

RobJones

13-Apr-06 10:46

After doing alot of research on the net I found that quite a few others are having the same issues and everyone suggested to use GetOpenFileName instead... I have implemented that and everything seems to be working fine.

Thanks for all the suggestions!

Rob

Whoever said nothing's impossible never tried slamming a revolving door!

how to close or recycle "FILE f_ptr" after using it

mrby12313-Apr-06 6:46

mrby123

13-Apr-06 6:46

how to close or recycle FILE f_ptr after using it. e.g.

FILE *f_ptr1

if((f_ptr1 = fopen(textFileName,"w")) == NULL) {

...}

....

And how to recycle a array after use it within a program.

double data[10000];

....using it and finish use it

how to close or destroy it so reserve the memory

Re: how to close or recycle "FILE f_ptr" after using it

David Crow13-Apr-06 7:09

David Crow

13-Apr-06 7:09

mrby123 wrote:
how to close...

How about fclose()?

mrby123 wrote:
double data[10000];

....using it and finish use it

how to...destroy it

It's on the stack. What's to destroy?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: how to close or recycle "FILE f_ptr" after using it

mrby12313-Apr-06 7:17

mrby123

13-Apr-06 7:17

fclose90 works, thanks! I mean in the heap?

-- modified at 13:32 Thursday 13th April, 2006

Re: how to close or recycle &quot;FILE f_ptr&quot; after using it

David Crow13-Apr-06 7:37

David Crow

13-Apr-06 7:37

mrby123 wrote:
I mean in the heap?

mrby123 wrote:
double data[10000];

Memory for data has not been allocated on the heap. The only way to free it up is to close the application.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: how to close or recycle &quot;FILE f_ptr&quot; after using it

mkuhac13-Apr-06 10:33

mkuhac

13-Apr-06 10:33

DavidCrow wrote:
The only way to free it up is to close the application.

Depends.
If array data is global then yes.

Re: how to close or recycle &amp;quot;FILE f_ptr&amp;quot; after using it

David Crow13-Apr-06 10:40

David Crow

13-Apr-06 10:40

mkuhac wrote:
If array data is global...

As opposed to what?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Capture and send bits???

dSolariuM13-Apr-06 6:17

dSolariuM

13-Apr-06 6:17

Hi, I use this way to capture the screen:

CRect lpRect;
CImage image;
CString strPath;
char chPath[256];
CWnd *pWnd;
int nBB;

//Get the window desktop
pWnd=GetDesktopWindow();

//Create a CWindowDC to hold the desktop info
CWindowDC winDC(pWnd);

//Get the size of desktop
pWnd->GetWindowRect(lpRect);

//Retrieve number of bits per inch
nBB=winDC.GetDeviceCaps(BITSPIXEL)*winDC.GetDeviceCaps(PLANES);
if (nBB<24)
nBB=24;
////////////////////////End///////////////////////////////////

Is there any way to send picture bits or make an array of pixels (A fast way)?

and I have know that there is another way to capture the screen using GDI+,
Can you possibly tell me how to do this?(Is it faster of above code?)
Thanks.

Every new thing you learn,Gives you a new personality.

Re: Capture and send bits???

Shuang. Wu13-Apr-06 20:19

Shuang. Wu

13-Apr-06 20:19

CImage::GetBits is just what you need.

<font=sans-serif>|-|3llo Wo|2ld

get file size ?

big_denny_20013-Apr-06 5:47

big_denny_200

13-Apr-06 5:47

hi all

let us say I have MFC application (dialog based) and have a string which contains some file path

strPath = "c:\\hello_guys.txt"

what is a handy way to retrieve size of this file, programatically ?

thank you.

Re: get file size ?

alex.barylski13-Apr-06 5:51

alex.barylski

13-Apr-06 5:51

GetLength()[^]

It's frustrating being a genius and living the life of a moron!!!

Re: get file size ?

toxcct13-Apr-06 5:59

toxcct

13-Apr-06 5:59

Hockey, i'm truly sorry... i intended to give you a '5', but my mouse moved wrongly Frown | :(

Re: get file size ?

David Crow13-Apr-06 5:59

David Crow

13-Apr-06 5:59

How about GetFileSize()?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: get file size ?

big_denny_20013-Apr-06 7:21

big_denny_200

13-Apr-06 7:21

hi David

as I see GetFileSize() needs HANDLE to a file as a parameter , that means as i know I need to open the file for reading at least.

I need to retrieve sizes of files in loop. I did it by opening them and calling GetLength method, but it seemd ugly
Frown | :(

<br />
for(...)<br />
{<br />
  CFile file<br />
  file.Open(path,CFile::modeRead)<br />
  Length[i] = file.GetLength()<br />
  file.Close()<br />
}<br />

Is not there any API like this for example?

ULONGLONG GetFileSize(LPCTSTR sPath);

or any more convenient way?

thank you

Re: get file size ?

David Crow13-Apr-06 7:46

David Crow

13-Apr-06 7:46

big_denny_200 wrote:
I did it by opening them and calling GetLength method, but it seemd ugly

But does it work, and is it easy to understand both now and in the future?

big_denny_200 wrote:

Is not there any API like this for example?

There's also _stat().

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

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