Getting data from dialog box

This is a discussion on Getting data from dialog box within the Windows Programming forums, part of the Platform Specific Boards category; Hello, I'm having trouble retreiving data from control variables in dialog box. My dialog box class has one control variable, ...

  1. #1
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    Sep 2003
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    Getting data from dialog box

    Hello,
    I'm having trouble retreiving data from control variables in dialog box. My dialog box class has one control variable, CComboBox c_box. Here's some code:

    Code:
    void MyView::OnItemClick()
    {
     MyDialog dlg(this);
     char tmp[10];
     int num;
    
     if(dlg.DoModal() == IDOK)
     {
       dlg.c_box.GetLBText(dlg.c_box.GetCurSel(), tmp);
       num = atoi(tmp);
     }
    }
    But this crashes at the call to GetLBText(); I get a debug assetion failed error. Why is this happening?

    Thanks.

  2. #2
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    167
    It may help to post some more code, maybe the GetLBText and related code.
    silk.odyssey

  3. #3
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    GetLBText is a member function of CComboBox; that's not my code. Here's my initdialog function for MyDialog:
    Code:
    BOOL MyDialog::OnInitDialog()
    {
     CDialog::OnInitDialog();
     int i;
     char tmp[10];
    
     for(i = 1; i <= 10; i++)
     {
      sprintf(tmp, "%i", i);
      c_box.InsertString(-1, tmp);
     }
    
     c_box.SetCurSel(0);
    
     return TRUE;
    }

  4. #4
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    1,348
    mfc objects destroyed after domodal destroywindow result in postncdestroy in objects

    Kuphryn

  5. #5
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    How do I get around that?

  6. #6
    Registered User
    Join Date
    Sep 2003
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    224
    I added an OnOk() button handler. Is that the best way to go about it? So the view class function becomes:
    Code:
    void MyView::OnItemClick()
    {
     MyDialog dlg(this);
    
     dlg.DoModal();
    }
    and my OnOk handler is:
    Code:
    void MyDialog::OnOK() 
    {
     // TODO: Add extra validation here
    	
     CDialog::OnOK();
     CONT_SIMDoc* pDoc = (CONT_SIMDoc*) parent->GetDocument();
     char tmp[10];
    
     c_box.GetLBText(c_box.GetCurSel(), tmp);		
     parent->num = atoi(tmp);
    }
    Last edited by Yasir_Malik; 05-16-2006 at 01:31 PM. Reason: Forgot DoModal().

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