Have been able to load a JPG image with MFC C++ programming, but only after the file dialog is displayed and
a selection made. I need to be able to load the Jpg image without displying the file dialog.
Please advise,
PXU
The following code fragments may help answer my programming problem.
The first "OnCreate" routine displays a selected image correctly.
The second "OnCreate" routine fails with "80004005 - Unspecified error",
I understand that I am not coding this correctly, but I have not found
the solution.
// DLG6.cpp : implementation file
#include "stdafx.h"
#include "DLG6.h"
#include <atlimage.h>
#include <comdef.h>
#include <afxstr.h>
enum SizesEnum
{
SIZE_HALF,
SIZE_ORIGINAL,
SIZE_DOUBLE,
SIZE_FILL,
SIZE_NONE
};
CImage imgOriginal;
int m_nFilterLoad;
SizesEnum m_nImageSize;
int DLG6::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CDialog::OnCreate(lpCreateStruct) == -1)
return -1;
CString strFilter;
HRESULT hResult;
strFilter = _T("Jpeg image files (*.JPG)||");
CFileDialog dlg(TRUE,
_T("JPG"),
ex,
(OFN_FILEMUSTEXIST | OFN_HIDEREADONLY),
strFilter);
dlg.m_ofn.lpstrCustomFilter = NULL;
hResult = (int)dlg.DoModal();
if(FAILED(hResult)) return -1;
hResult = imgOriginal.Load(dlg.GetFileName());
if (FAILED(hResult)) return -1;
m_nImageSize = SIZE_FILL;
Invalidate();
UpdateWindow();
return 0;
}
int DLG6::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CDialog::OnCreate(lpCreateStruct) == -1)
return -1;
HANDLE fhx;
HRESULT hResult;
fhx = CreateFile(_T("C:\\test2.JPG"),
(GENERIC_READ),
NULL,
NULL,
OPEN_EXISTING,
NULL,
NULL);
if (fhx == INVALID_HANDLE_VALUE)
{
AfxMessageBox (_T("create fail"));
return -1;
}
hResult = imgOriginal.Load(_T("C:\\test2.JPG"));
if (FAILED(hResult)) {
CString fmt;
fmt.Format(_T("Load failed:\n%x - %s"),
hResult, _com_error(hResult).ErrorMessage());
::AfxMessageBox(fmt);
return -1;;
}
m_nImageSize = SIZE_FILL;
Invalidate();
UpdateWindow();
return 0;
}
Cordially,
PXU
