Setting Up a default path for saving and Opening files in the MFC Framework

[Simon Pettman]

I have an MFC SDI application. I have stored a Key in the Registry that contains the default directory that is used for storing files created and read from the application. I have no problems extracting the key from the registry within my application.

I would like to no what the best practice within the MFC Doc/View Framework for implementing a default directory.

At the moment I have Over Ridden


void CWinApp::OnFileOpen()




And


BOOL CDocument:oSave(LPCTSTR lpszPathName, BOOL bReplace)




The DoSave implementation is a little messy and I am concerned about its robustness. Is there a suggested way to do this?

Simon Pettman
All answers rated!

[Acid Burn]

Hi,

I think a quite simple way is to override the OnFileOpen, OnFileSave and OnFileSaveAs functions.
I have done this and it's not really difficult.

I have implemented it like the following ...


void CSDITestDoc::OnFileOpen()
{
CString strFileName;
CString strCurrentDir;

// Create a file open dialog
CFileDialog fdOpen(TRUE, NULL, NULL, OFN_FILEMUSTEXIST,
"Text files (*.txt)|*.txt|All Files (*.*)|*.*||");

// Do your stuff here ...
strCurrentDir = "C:\\Temp";

// Set current directory for file open dialog
fdOpen.m_ofn.lpstrInitialDir = strCurrentDir;

// Open dialog
if (fdOpen.DoModal() == IDOK)
{
// Get file name
strFileName = fdOpen.GetPathName();

// Set new file name -> you have to do this !
SetPathName(strFileName);

// Open document
OnOpenDocument(strFileName);
}
}

void CSDITestDoc::OnFileSave()
{
CString strFileName = GetPathName();

// Verify if a file name is specified
if (strFileName.IsEmpty())
{
// Call file save as function
OnFileSaveAs();
}
else
{
// Save document
OnSaveDocument(strFileName);
SetModifiedFlag(FALSE);
}
}

void CSDITestDoc::OnFileSaveAs()
{
CString strFileName;
CString strCurrentDir;

// Create a file save as dialog
CFileDialog fdSaveAs(FALSE, NULL, NULL, OFN_OVERWRITEPROMPT,
"Text files (*.txt)|*.txt|All Files (*.*)|*.*||");

// Do your stuff here ...
strCurrentDir = "C:\\Temp";

// Set current directory for file save as dialog
fdSaveAs.m_ofn.lpstrInitialDir = strCurrentDir;

// Open dialog
if (fdSaveAs.DoModal() == IDOK)
{
// Get file name
strFileName = fdSaveAs.GetPathName();

// Set new file name -> you have to do this !
SetPathName(strFileName);

// Save document
OnSaveDocument(strFileName);
SetModifiedFlag(FALSE);
}
}




Hope it helps :-)
AcidBurn