Why listbox applicaion crashes on exit ?

[s_mehdi76]

HI,
I am beginner to symbian. i have created a simple application that allows the user to logon, after successfull login, it display the listbox, i created login dialog using resource file if it return OK then my Appui class create the Listboxcontainer object. and perform operations, but the problem is that when user click back or exit while on Listbox screen, it crashes.Error "Program closed". the main function in Apui ConstructL is :

void CMKISAppAppUi::ConstructL()
{
BaseConstructL();

TBool okPressed = CMKISAppLoginContainer::RunDlgLD(); // call login Dialog
if (okPressed)
{
iKeyListContainer = new (ELeave) CMKISAppKeyListContainer;
iKeyListContainer->SetMopParent( this );
iKeyListContainer->ConstructL( ClientRect() );
AddToStackL( iKeyListContainer );
}
else
{
Exit();
}
}

CMKISAppAppUi::~CMKISAppAppUi()
{
if (iKeyListContainer)
{
RemoveFromStack( iKeyListContainer );
delete iKeyListContainer;
}
}
void CMKISAppAppUi::HandleCommandL(TInt aCommand)
{
switch ( aCommand )
{
case EEikCmdExit:
{
Exit();

break;
}
.......
}

please help me,
any suggestion will be highly appreciated.
Thanx in advance.

[Nitesh Bhardwaj]

HI,
I am beginner to symbian. i have created a simple application that allows the user to logon, after successfull login, it display the listbox, i created login dialog using resource file if it return OK then my Appui class create the Listboxcontainer object. and perform operations, but the problem is that when user click back or exit while on Listbox screen, it crashes.Error "Program closed". the main function in Apui ConstructL is :

void CMKISAppAppUi::ConstructL()
{
BaseConstructL();

TBool okPressed = CMKISAppLoginContainer::RunDlgLD(); // call login Dialog
if (okPressed)
{
iKeyListContainer = new (ELeave) CMKISAppKeyListContainer;
iKeyListContainer->SetMopParent( this );
iKeyListContainer->ConstructL( ClientRect() );
AddToStackL( iKeyListContainer );
}
else
{
Exit();
}
}

CMKISAppAppUi::~CMKISAppAppUi()
{
if (iKeyListContainer)
{
RemoveFromStack( iKeyListContainer );
delete iKeyListContainer;
}
}
void CMKISAppAppUi::HandleCommandL(TInt aCommand)
{
switch ( aCommand )
{
case EEikCmdExit:
{
Exit();

break;
}
.......
}

please help me,
any suggestion will be highly appreciated.
Thanx in advance.

what is "CMKISAppLoginContainer"??

[eswar_illuri]

Hi,

Check the listbox screen destructor, put a break point in listbox screen destructor and find where exactly it crashes.

regards,
Eswar

[s_mehdi76]

* MKISAppLoginContainer is my class derived from Akndialog, responsible for login, return true if valid user else false.
* i debug the code, first it executes HandleCommandL() Exit() then Appui Destructor. after this application crashes.

Hi,

Check the listbox screen destructor, put a break point in listbox screen destructor and find where exactly it crashes.

regards,
Eswar

[eswar_illuri]

Hi,

Check your CMKISAppLoginContainer destructor also.

Regards,
Eswar

[s_mehdi76]

HI
I think there is no need of destructor in CMKISAppLoginContainer because i called ExcuteLD().

TBool CMKISAppLoginContainer::RunDlgLD()
{
CMKISAppLoginContainer* LoginDialog = new (ELeave) CMKISAppLoginContainer();

return LoginDialog->ExecuteLD(R_LOGIN_DIALOG); //R_DIALOG_USERNAME_PASSWORD_QUERY
}

Hi,

Check the listbox screen destructor, put a break point in listbox screen destructor and find where exactly it crashes.

regards,
Eswar

Hi,

Check your CMKISAppLoginContainer destructor also.

Regards,
Eswar

[s_mehdi76]

i have solved my problem.
thanx to all.

[Nitesh Bhardwaj]

i have solved my problem.
thanx to all.

instead of this "i have solved my problem",if people post this "i have solved my problem ,the problem was that"
it will be a good things to those, who are cuming at this point

[s_mehdi76]

yes i totally agree.
actually i solved my problem, after calling User::Exit(0) on receving Exit command in HandleCommandL of Appui class.
All the Best