Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Adding A File Open Dialog To A Program

Posted on 1998-02-07
3
Medium Priority
?
208 Views
Last Modified: 2010-04-10
I have a dialog based application that I have created.  As of right now, the user has to manually input the file name and path of where the file is located.  The program then loads the file and allows the user to edit values and then saves the file back.

I want to add the functionality of a File Open dialog like every windows application uses.  I created a menu and attached it to the dialog box and now I have no idea how to call the built in file open dialog that is in the windows/MFC API.

In visual C++ I read that there is a ID_FILE_OPEN derived from the CWinApp class and the ID_FILE_OPEN command has to be placed in a CWinApp derived classes message map.  My program has three classes CLORDSEDApp derived from CWinApp, and CLORDSDLG derived from CDialog, and an AboutBox Class.

Now I added the the command handler to the message map of CLORDSEDApp which is derived from CWinApp, however when the program compiles and runs I get an ASSERT error and the program halts.  I gave up on this so I tried to utilize the CFileDialog class to create the file open dialog, and this produced the same assert error.

My question is what is the best way for me to implement this and how does the implementation take place.  What I am looking for is a way for the user to select the file he/she wants and have the dialog open the file (similar to createfile because thats what I am using now) or return the name and path to the program for me to write the opening and closing code.  
0
Comment
Question by:larockd
3 Comments
 
LVL 7

Accepted Solution

by:
galkin earned 20 total points
ID: 1181108
First I don't undestand where you load the file. MFC standard document/view behaviour assumes creating new document when you open any file. But dialog based application has no document. so you can either read file display its context to the user in a control( for instance in multiline edit box) allow user to edit it and then save to the file back. You cannot use standard MFc implementation. Instead add menu item to dialog menu with your custom ID. Add message handler(If you add it to system menu you must handle it in WM_SYSCOMMAND handler) and from this handler construct CFileDialog the callits DoModal. On this function returns you have filename use selected.

0
 

Author Comment

by:larockd
ID: 1181109




0
 

Expert Comment

by:pdmoro
ID: 2510157
Try GetOpenFileName()

Something like this

OPENFILENAME OpenFileName;
char *lpFilter = "Bat Files (*.bat)\0*.bat\0Link Files (*.lnk)\0*.lnk\0All Files (*.*)\0*.*\0\0";
      OpenFileName.lStructSize            = sizeof(OPENFILENAME);
      OpenFileName.hwndOwner                  = m_hWnd;
      OpenFileName.hInstance                  = AfxGetApp()->m_hInstance;
      OpenFileName.lpstrFilter            = lpFilter;
      OpenFileName.lpstrCustomFilter      = NULL;
    OpenFileName.nMaxCustFilter            = 0;
    OpenFileName.nFilterIndex            = 0;
    OpenFileName.lpstrFile                  = m_szFileName;
    OpenFileName.nMaxFile                  = MAX_PATH;
    OpenFileName.lpstrFileTitle            = NULL;
    OpenFileName.nMaxFileTitle            = 0;
    OpenFileName.lpstrInitialDir      = m_szFullFilePath;
    OpenFileName.lpstrTitle                  = NULL;
    OpenFileName.nFileOffset            = 0;
    OpenFileName.nFileExtension            = 0;
    OpenFileName.lpstrDefExt            = NULL;
    OpenFileName.lCustData                  = NULL;
      OpenFileName.lpfnHook                  = NULL;
      OpenFileName.lpTemplateName            = NULL;
0

Featured Post

[Webinar] Cloud and Mobile-First Strategy

Maybe you’ve fully adopted the cloud since the beginning. Or maybe you started with on-prem resources but are pursuing a “cloud and mobile first” strategy. Getting to that end state has its challenges. Discover how to build out a 100% cloud and mobile IT strategy in this webinar.

Question has a verified solution.

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

  Included as part of the C++ Standard Template Library (STL) is a collection of generic containers. Each of these containers serves a different purpose and has different pros and cons. It is often difficult to decide which container to use and …
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.
Suggested Courses

783 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