Re: Easiest way to set the File Open default directory?

Sonu wrote:


I'm not sure if that'll work, but I came up with my own solution, and I
figure that, in the interest of helping anyone in the future who might
have this problem, I'll offer up my solution. This is in Visual C++
..NET and I put all of the functions directly into the main
application's class (in my case, CCoilApp).

I'm making a function called OnFileOpen(). First, I have to set it up
to correctly receive messages by adding it to the message map (in
CCoilApp):

    ON_COMMAND(ID_FILE_OPEN, OnFileOpen)

Now I add a few headers into CCoilApp for stuff that I'll need:

public:
    afx_msg void OnFileOpen();
    BOOL DoPromptOpenFile(CString& fileName, UINT nIDSTitle, DWORD lFlags,
BOOL bOpenFileDialog, CDocTemplate* pTemplate);
    bool firstOpen;

I edit the CCoilApp constructor to set firstOpen to true. Now, for the
two functions that do all of the work:

void CCoilApp::OnFileOpen()
{
    if (!firstOpen) {
        CWinApp::OnFileOpen();
    }
    else {
        firstOpen = false;
        // prompt the user (with all document templates)
        CString newName;
        if (!DoPromptOpenFile(newName, AFX_IDS_OPENFILE, OFN_HIDEREADONLY |
OFN_FILEMUSTEXIST, TRUE, NULL))
            return; // open cancelled
        AfxGetApp()->OpenDocumentFile(newName);
    }

        // if returns NULL, the user has already been alerted
}

BOOL CCoilApp::DoPromptOpenFile(CString& fileName, UINT nIDSTitle,
DWORD lFlags, BOOL bOpenFileDialog, CDocTemplate* pTemplate)
{
    CFileDialog dlgFile(bOpenFileDialog, NULL, NULL, OFN_HIDEREADONLY |
OFN_OVERWRITEPROMPT, NULL, NULL, 0);

    CString title;
    VERIFY(title.LoadString(nIDSTitle));

    dlgFile.m_ofn.Flags |= lFlags;

    CString strFilter;
    CString strDefault;

    // append the "*.*" all files filter
    CString allFilter;
    VERIFY(allFilter.LoadString(AFX_IDS_ALLFILTER));
    strFilter += allFilter;
    strFilter += (TCHAR)'\0'; // next string please
    strFilter += _T("*.*");
    strFilter += (TCHAR)'\0'; // last string
    dlgFile.m_ofn.nMaxCustFilter++;

    TCHAR file[_MAX_PATH];
    GetModuleFileName( NULL, file, _MAX_PATH );
    CString mod_dir = file;
    mod_dir = mod_dir.Mid( 0, mod_dir.ReverseFind( '\\' ) );
#if _DEBUG
        mod_dir = mod_dir.Mid( 0, mod_dir.ReverseFind( '\\' ) );
#endif
    mod_dir += "\\HX";

    dlgFile.m_ofn.lpstrFilter = strFilter;
    dlgFile.m_ofn.lpstrTitle = title;
    dlgFile.m_ofn.lpstrFile = fileName.GetBuffer(_MAX_PATH);
    dlgFile.m_ofn.lpstrInitialDir = mod_dir;

    INT_PTR nResult = dlgFile.DoModal();
    fileName.ReleaseBuffer();
    return nResult == IDOK;
}

The way it works is rather simple. By copying over and slightly
modifying the code from the MFC classes that handle file loading I get
the desired functionality of setting the open directory to the
program's location (plus HX\ where the data is saved) when it is first
run, but on subsequent File->Opens, the boolean is false, so the
default method is called, thus, the user won't have to keep navigating
over and over to a different directory.