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How do I transfer data from child dialog to the parent Cformview?

Posted on 2004-10-29
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Last Modified: 2013-11-20
I am new to MFC programming and I'm trying to transfer data (for example, which check boxes were checked or which radio button was selected) from a child dialog to the parent formview.  The formview needs to know what was selected in the child dialgo box.  I want to update a static text control or a editable text control in the formview, once the user has clicked on the "OK" button on the child dialog box.  I am using MFC document/view architecture and my application is a SDI.  Can someone provide me with some ideas on which is the best way for the parent formview be aware on what was selected in the child dialog?

Thanks.
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Question by:urivera
    4 Comments
     
    LVL 6

    Assisted Solution

    by:Amritpal Singh
    hi
    for transferring information in case of dialogs u use the technique known as Dialog Data Exchange (or DDX).
    u have to declare member function in ur data class ,that will correspond to each control .
    then u'll use DoDataExchange for actual transfer

    for an example have a look at the following link

    https://www.aut.utt.ro/e-books/books5/1556225121/ch07/264-267.html#Heading13
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    LVL 6

    Expert Comment

    by:Amritpal Singh
    0
     
    LVL 48

    Accepted Solution

    by:
    Add public class members to the child class dialog:

    class CChildDialog
    {
    public:
       
        int m_nRadioSelection;
        CString m_sText;
        ...
    };

    Fill these members in OnOK:

    void CChildDialog::OnOK()
    {
        m_nRadioSelection = ...;
        m_sText = ...;
    }

    Get their values from the parent class:

    void CParent::OnShowChild()
    {
        CChildDialog dlg(this);
        if ( dlg.DoModal == IDOK )
        {
            // ise dlg.m_nRadioSelection and dlg.m_sText here
        }
    }

    Notice that m_nRadioSelection and m_sText should not be members linked to dialog controld using DDX. You may keep another class members for this, and use their values to set output data in OnOK.
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    Author Comment

    by:urivera
    Thanks for your replies
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