Re: Show a login dialog box before the main application

From:

"AliR" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 1 Jun 2006 12:54:38 -0500

Message-ID:

<447f29d4$0$23779$a8266bb1@reader.corenews.com>

Sorry about the late replay, it's been a busy day.

1. You should do a couple of things, don't allow your login dialog to close
when username or password are empty.

void CLoginDialog::OnOK()
{
    UpdateData();
    m_strUserName.Trim();
    m_strPassword.Trim();
    if (m_strUsername.IsEmpty())
    {
        MessageBox("Please enter a username.");
        return;
    }
    if (m_strPassword.IsEmpty())
    {
        MessageBox("Please Enter a password");
        return;
    }

    CDialog::OnOK();
}

2. You can place the login business in a loop and keep showing it until the
user enters the correct username and password, or presses cancel.

int CWinApp() :: InitInstance ()
{
    CLoginDialog login;
    login.DoModal();

    while (1)
    {
        if (login.DoModal() == IDCANCEL)
        {
            //exit application.
            return FALSE;
        }

        //here check the username and password to see if it is correct.

        if (UsernameAndPasswordCorrect)
        {
            break; //exit the loop and continue loading application
        }
    }

AliR.

<kavitha_tongadi@hotmail.com> wrote in message
news:1149171948.266262.243350@i40g2000cwc.googlegroups.com...

Thanks Ali,
It worked after I followed your steps.
How should
#1I restrict the user from entering the wrong user name and in order to
do that I placed this code in InitInstance but if you click OK 3 times
without enetring the user name and pwd ,the main application window
will pop up.

How shoudl I restrict the user to enter correct user name and pwd and
after validation show the main window

#2After enetring the username and pwd ,The login dialog box disappears
and messageBox appears ,After i clcik OK the login dialog box appears
again.
How shoudl I show both the message box and the dialog box ?

code for the above 2 steps

in CWinApp() :: InitInstance ()
{
CLoginDialog login;
login.DoModal();

if ((login.m_strUserName != "abc" ) || (login.m_strPassword != "abc"
))
{
AfxMessageBox("Wrong UserName/Pwd-Enter Again ",0,0);
login.DoModal();

//return FALSE;
}
if(login.DoModal()!=IDOK)
{
return FALSE;
}

...
...
// InitCommonControlsEx() is required on Windows XP if an application
// manifest specifies use of ComCtl32.dll version 6 or later to enable
// visual styles. Otherwise, any window creation will fail.
INITCOMMONCONTROLSEX InitCtrls;
InitCtrls.dwSize = sizeof(InitCtrls);
// Set this to include all the common control classes you want to use
// in your application.
InitCtrls.dwICC = ICC_WIN95_CLASSES;
InitCommonControlsEx(&InitCtrls);

CWinApp::InitInstance();
...
....
}
thanks
Kavitha
AliR wrote:

Maybe something is happening in the InitApplication method.

I personally put splash screens and login screen in InitInstance and it
comes up before anything else.

BOOL CMyApp::InitInstance()
{
    CSplashDlg Splash;
    Splash.Create(CSplashDlg::IDD,NULL);
    Splash.ShowWindow(SW_SHOW);

    InitCommonControls();

    CWinApp::InitInstance();

    CLoginDialog Login;
    if (Login.DoModal() != IDOK)
    {
        return FALSE;
    }

    .....
}

AliR.

<kavitha_tongadi@hotmail.com> wrote in message
news:1149111976.487404.4150@h76g2000cwa.googlegroups.com...

Ali
Tried that too ,but could not show up the dialog before the main
window.
What should be done.
There are 3 windows actually
1. 3rd party diaolg box
2.My dialog box
3. The main window
It will be okay even if I could show the my dialog box first and then
the other 2 windows.
Any guesses please
Kavitha

AliR wrote:

Why don't you do your login dialog before you initialize the third

party

control? (put your login code higher up in InitInstance)

AliR.

<kavitha_tongadi@hotmail.com> wrote in message
news:1149110839.439279.44240@y43g2000cwc.googlegroups.com...

Hi I am using 3rd party SomeABC tools.
I want to show a login dialog box before the main SDI app

(CFormView).

After I placed the code in initInstance and called before creating

the

Template

The third part diaolg box is getting popped up and over that I am

able

to see a part of my dialog box.
How to hide the 3rd party dialog box and show my dialog box and

then

show the main application window .
Please guide.

kavitha_tongadi@hotmail.com wrote:

Hi
I want to show a login dialog box before the main SDI app

(CFormView).

I dont even the see the dialog box and the main app runs in the
background
Now here is the code ,Where I am missing ?Can anyone point the

error?

CMyWinApp ::InitInstance()
{
..
..
..
// The one and only window has been initialized, so show and

update

m_pMainWnd->ShowWindow(SW_HIDE);
m_pMainWnd->UpdateWindow();
//int i = AfxMessageBox(_TEXT("HEllo"),MB_OK,0);

CLoginDlg login;
if(login.DoModal() ==IDOK )
{
m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
m_pMainWnd->UpdateWindow();

}
// call DragAcceptFiles only if there's a suffix
// In an SDI app, this should occur after ProcessShellCommand
return TRUE;
}

Kavitha