MFC Assertion Failed

patti_ · #1 21-Jul-2005, 00:07

Hi, I new with MFC, I am trying to create a small application for PDA.
I have now created a ComboBox Control and when I try .AddString() I'll get Assertion Failed.
Why is that?

Thanks In advance
Patrik

#2 21-Jul-2005, 00:30

Quote:

Originally Posted by patti_

Hi, I new with MFC, I am trying to create a small application for PDA.
I have now created a ComboBox Control and when I try .AddString() I'll get Assertion Failed.
Why is that?

Thanks In advance
Patrik

Hi,
You have this message because your COMBO Control is not Yet created. the variable that reference it = undifined value.

i think you have added this code (combo.AddString("")) in the OnCreate() handler.

if your combo is on top of a dialog box, try adding the AddString() in the OnInitDilaog() just before the "return TRUE".

wish this help u.

Xirtam.

patti_ · #3 21-Jul-2005, 00:41

Quote:

Originally Posted by Xirtam

Hi,
You have this message because your COMBO Control is not Yet created. the variable that reference it = undifined value.

i think you have added this code (combo.AddString("")) in the OnCreate() handler.

if your combo is on top of a dialog box, try adding the AddString() in the OnInitDilaog() just before the "return TRUE".

wish this help u.

Xirtam.

YES, Thanks alot! I don't understand exacly how it is like this, but now it works.

Best Regards Patrik

LuciWiz · #4 21-Jul-2005, 00:50

Quote:

Originally Posted by patti_

Hi, I new with MFC, I am trying to create a small application for PDA.
I have now created a ComboBox Control and when I try .AddString() I'll get Assertion Failed.
Why is that?

Thanks In advance
Patrik

Well, did you create the combo via the Graphical Interface, or did you add it manually, by code? In case you went for the second, you need to both create the control and add it to the dialog (or whatever):

CPP / C++ / C Code:

	m_fileExtension = new CComboBox();
	m_fileExtension->Create(WS_CHILD | WS_VISIBLE | WS_VSCROLL | CBS_DROPDOWNLIST | CBS_SORT,
			CRect(709, 122, 759, 202), this, 10034);

	m_fileExtension->AddString(".txt");
	int nRetCode = m_fileExtension->AddString(".doc");
	nRetCode = m_fileExtension->AddString(".xls");

This is an example from a lame program of mine. Modify the values from CRect - or better yet find a formula to position the combo relative to your dialog box - so they better suit your needs.

In case this wasn't the problem, please let me know. If that is the case, please provide a short and relevant piece of code showing the way you handle the combo.

Kind regards,
Lucian

[edit]
it seems I replied too late...
[/edit]

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