Re: Problem in Cimage
First thing, why are you using m_ for naming your local variables, m_ is
generally used for members of a class. This makes your code somewhat
difficult to read.
Second on which call to CImage are you getting the ASSERT?
Third why are you using CImage anyway, is it only to get the height and
width? I would modify CPictureCtrl to give you the information.
No one a total side note:
1. Your call to m_picutrecontrol.FreeData is totally unnessacery since,
CPictureControl.Load calls FreeData.
2. Also why are you calling Invalidate and RedrawWindow before you load the
image? Are they even nessessary? Why does the parent need to redraw itself
just because CPictureControl has changed, if anything you should call those
on the m_picturecontrol object once the image has been loaded.
AliR.
"Mohit" <behappy.mohit@gmail.com> wrote in message
news:3d6c39b1-c5ff-49c6-9bbb-0c06d853bd1a@x5g2000prf.googlegroups.com...
Hi,
I m trying to download and display image.My code works fine for some
time.After that i gives debug assertion error after CImage m_image;
at line 504 ATLASSERT( hBitmap != NULL );,1572 ATLASSERT( nBytes ==
sizeof( BITMAP ) );,630ATLASSUME( m_hBitmap != NULL ); on
altimage.h.
I try to debug but unable to finderror. m_picturecontrol is picture
control from
http://www.codeproject.com/KB/graphics/CPictureControl.aspx?display=Print
void CScreenclientDlg::Downloadfile()
{
CString strHeaders = _T("Content-Type: image/gif");
CInternetSession pSession;
CString strQueryTemp, strQuery;
//CString strResponse;
strQueryTemp.LoadString(IDS_DOWNLOADFILE);
strQuery.Format(strQueryTemp,accountno,sessid,sno);
strQuery=L"http://www.mydomain.com/"+strQuery;
pFile=pSession.OpenURL
(strQuery);//,NULL,INTERNET_FLAG_DONT_CACHE,NULL,NULL);
if (pFile)
{
IStream* pStream;
CImage m_image;
if(CreateStreamOnHGlobal(NULL, TRUE, &pStream) == S_OK)
{
BYTE pBuffer[1024];
UINT uiRead = 0;
ULONG ulWrittencount=0;
while((uiRead = pFile->Read(pBuffer, sizeof(pBuffer))) != 0)
{
ULONG ulWritten = 0;
pStream->Write(pBuffer, uiRead, &ulWritten);
}
lock=TRUE;
HRESULT hr=m_image.Load(pStream);
{m_CtrlHeight=m_image.GetHeight();
m_CtrlWidth=m_image.GetWidth();
RedrawWindow();
}
m_picturecontrol.FreeData();
m_picturecontrol.SetWindowPos(NULL,0,0,m_image.GetWidth
(),m_image.GetHeight(),SWP_NOMOVE | SWP_NOZORDER);
Invalidate();
RedrawWindow();
BOOL bResult= m_picturecontrol.Load(pStream);
pSession.Close();
m_image.Detach();
m_image.Destroy();
lock=FALSE;
}oldsno=sno;
while(pStream->Release());
}
delete pFile;
}
catch(CException *e)
{
AfxBeginThread(threading, this);
return;
}
AfxBeginThread(threading, this);
}
}
UINT CScreenclientDlg::threading1(LPVOID p)
{ CScreensharingclientDlg * me = (CScreensharingclientDlg *)p;
me->showimage(me->count);
return 0 ;
}
I works fine for some time but once i got error its repeat again and
again.Even when i dbug program agin immediately.
I am unable to understand reason.Is am i missing deallocating any
resource or pointer
Please help its urgent