Dialog Data Exchange

[Kash]

Hi, I am calling a Dialog box from a propery page. The dialog box contains an edit box which takes in numbers as user inputs. I then want these numbers to be used on the property page. However, as I "OK" the dialog box and go back to it, the numbers have changed back to what the constructor contains. I have used UpdataData(TRUE); but it continues to revert back to the original numbers. void CMyPropPage::OnCallMyDlgButton() { UpdateData(TRUE); CMyDlg ViewData; ViewData.DoModal(); UpdateData(FALSE); } Have I missed something out? kash

[jhwurmbach]

Kash wrote: Have I missed something out? Yep! MSDN[^]says:

The framework automatically calls UpdateData
with bSaveAndValidate set to FALSE when a modal
dialog box is created in the default implementation
of CDialog::OnInitDialog. The call occurs before
the dialog box is visible. The default
implementation of CDialog::OnOK calls this member
function with bSaveAndValidate set to TRUE to
retrieve the data, and if successful, will close
the dialog box.

So you Do not have to call UpdataData() yourself:

void CMyPropPage::OnCallMyDlgButton()
{
CMyDlg ViewData;
if (ViewData.DoModal()==IDOK)
m_Number = ViewData.m_Number;
}

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My opinions may have changed, but not the fact that I am right.

[palbano]

CMyDlg ViewData; ViewData.m_number = 10; // set data to previous value ViewData.DoModal(); m_viewdatanumber = ViewData.m_number; // capture data from dialog

"No matter where you go, there your are..." - Buckaoo Banzi

-pete

[Kash]

yep that works, but when I re-open the dialog box, the changes have been lost. I want to keep the changes fixed and not for it to revert to the constructor values of the dlg box. kash

[jhwurmbach]

Kash wrote: I want to keep the changes Then you can set the desired value before the DoModal(), as palbano suggested.

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My opinions may have changed, but not the fact that I am right.

[Kash]

Thanks, all works fine.