NEWBIE: Filling CListBox with string on class's constructor?

[Silver Ghost]

I have this dialog box, and it has a CListBox in it.. And it want to make it so that when the constructor is called, the box get filled with some strings.. but it gives me an assertion error whenever I try to use AddString method.. Here's what the constructor looks like::

CTemplatesDialog::CTemplatesDialog(CWnd* pParent /*=NULL*/)
    : CDialog(CTemplatesDialog::IDD, pParent)
{
    //{{AFX_DATA_INIT(CTemplatesDialog)
        // NOTE: the ClassWizard will add member initialization here
    //}}AFX_DATA_INIT

// List all the loaded templates
    AfxMessageBox("hi"); //WORKS FINE
    m_list.AddString("hi"); //ASSERTION FAILED    

} 

what would u suggest? And why is it happening?

[kuphryn]

Move the code to OnInitDialog().

Kuphryn

[JMS]

Can't do it in the constructor this is because the window's object isn't actually ready to recieve input at that stage. All the hinky stuff Microsoft has to do like setting up the windows message queue hasn't completed yet..

Alternatives would be to edit the Dialog resource file and you can actually add the strings right in the resource editor, dialog editor or whatever they're calling it now...

Another Idea would be to add the strings programatically in another function in the object and then just call that function in the dialog's OnInit windows message...

Hope this helps..

[Simon666]

You can only call AddString when the listbox is created already. I would therefore suggest calling AddString in your dialog's OnInitDialog function.

[Silver Ghost]

Ehh.. how should I put it? AppWizard didnt generate any InitInstance functions... so should I create a virtual function OnInitInstance? Anything I should know about?

[galathaea]

Go to the class wizard and add a handler for WM_INITDIALOG for your dialog's class, or you can insert it by hand into the message handling list and add the function by hand. But you want to do this in the dialog, not the app's intializing of its instance.

[Paul McKenzie]

In "AppWizard", there is a WM_INITDIALOG handler that you select to add the OnInitDialog function stub in your code.

Anyway, why rely on a "Wizard"? The function OnInitDialog is documented in all the help files. Just look at the prototype and add it to your .H and .CPP files for your dialog. There will be a time when AppWizard will not have the function you're looking for and you will have to sit down and code the old fashioned way -- editing and compiling

Regards,

Paul McKenzie