[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

Deriving a class from CFileDialog & displaying Open/Save dialog

Posted on 1998-10-19
2
Medium Priority
?
835 Views
Last Modified: 2013-11-20
When creating a dialog based app, I create a new class &
derive it from CFileDialog. I am trying to display the Open & Save dialog, but it doesen't work.  I've asked this question before and followed instructions from Answer2000.
Now I am getting a "unresolved external" error after I build the application. Here is a snippet of my code.
The class declaration is here:


#if !defined(AFX_FILEOPENSAVE_H__76822602_5EB8_11D2_AC74_444553540000__INCLUDED_)
#define AFX_FILEOPENSAVE_H__76822602_5EB8_11D2_AC74_444553540000__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000
// FileOpenSave.h : header file
/////////////////////////////////////////////////////////////////////////////
// CFileOpenSave dialog

class CFileOpenSave : public CFileDialog
{
      DECLARE_DYNAMIC(CFileOpenSave)

            
public:
      CFileOpenSave(BOOL bOpenFileDialog, // TRUE for FileOpen, FALSE for FileSaveAs
            LPCTSTR lpszDefExt = NULL,
            LPCTSTR lpszFileName = NULL,
            DWORD dwFlags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
            LPCTSTR lpszFilter = NULL,
            CWnd* pParentWnd = NULL);
      

     
      CFileOpenSave(); //constructor function declared here

protected:
      //{{AFX_MSG(CFileOpenSave)
      afx_msg void OnFileOpen();
      //}}AFX_MSG
      DECLARE_MESSAGE_MAP()
};
//////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////

The .cpp file is here:

// FileOpenSave.cpp : implementation file
//

#include "stdafx.h"
#include "Table2.h"
#include "FileOpenSave.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CFileOpenSave

IMPLEMENT_DYNAMIC(CFileOpenSave, CFileDialog)

CFileOpenSave::CFileOpenSave(BOOL bOpenFileDialog, LPCTSTR lpszDefExt, LPCTSTR lpszFileName,
            DWORD dwFlags, LPCTSTR lpszFilter, CWnd* pParentWnd) :
            CFileDialog(bOpenFileDialog, lpszDefExt, lpszFileName, dwFlags, lpszFilter, pParentWnd)
{
}

      

BEGIN_MESSAGE_MAP(CFileOpenSave, CFileDialog)
      //{{AFX_MSG_MAP(CFileOpenSave)
      ON_COMMAND(ID_FILE_OPEN, OnFileOpen)
      //}}AFX_MSG_MAP
END_MESSAGE_MAP()


void CFileOpenSave::OnFileOpen()
{
      
    CFileOpenSave dlgOpSv;
    dlgOpSv.DoModal();

    // TODO: Add your command handler code here
    //This is my problem.  I don't know why it's not     //working!
}


My dialog box has a menu with File|Open, but doesn't create the dialog.  I've included the <afxdlgs.h> file in the stdfx.h f header & still nothing.  The only time
it works is if I create an SDI or MDI app.
If you are out there, please Help, Answers2000.
I've looked in my books to trubleshoot this problem &
in the MFC help.  Still having problems. (Remember,
I'm a beginner...)

0
Comment
Question by:pagz
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 7

Expert Comment

by:psdavis
ID: 1323522
Give us the unresolved error so we can see it!
0
 
LVL 7

Accepted Solution

by:
psdavis earned 100 total points
ID: 1323523
Ahhh... I see it now...

void CFileOpenSave::OnFileOpen()
{
    CFileOpenSave dlgOpSv;
    dlgOpSv.DoModal();
}

You are trying to create the dialog by a function inside of the dialog.  The CFileOpenSave::OnFileOpen doesn't exist yet until the DoModal is run, but the DoModal is inside itself.

You're going to want to run it from a different class...

void CYourDialogBox::OnFileOpen()
{
    CFileOpenSave dlgOpSv;
    dlgOpSv.DoModal();
}

Phillip
0

Featured Post

Ask an Anonymous Question!

Don't feel intimidated by what you don't know. Ask your question anonymously. It's easy! Learn more and upgrade.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
Have you tried to learn about Unicode, UTF-8, and multibyte text encoding and all the articles are just too "academic" or too technical? This article aims to make the whole topic easy for just about anyone to understand.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…

649 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question