Hi:
I just wanted to add something here.
When I use the keyboard to change the row in the master datawindow, it SOMETIMES
works. OTHER times, I just get the beep when it is time to display the messagebox.
Thanks
Sandeep
Sandeep R. Mirani wrote:
> Hi:
>
> Platform: Windows NT 4.0 , PB 5.0.03
>
> I have 2 datawindows on a window. dw_master and dw_detail. The two datawindows are
>linked. The detail datawindow allows for updates.
> I have retrieval style of linkage between the two datawindows.
>
> So far, So Good.
>
> When the user makes changes to the detail datawindow and clicks on a new row in the
>master, the changes are lost.
>
> To take care of this problem, I have put some code in the rowfocuschanged event of
>the master.
> 1. Override the ancestor so that notification is not sent to the linkage service.
> 2. This code checks to see if there are any changes in the detail datawindow, and if
>there are any, it displays a messagebox to the user asking if they would like to save
>the changes.
> 3. Call the ancestor script to send a notification to the linkage service.
>
> The problem here is "THE MESSAGEBOX DOES NOT SHOW". It just beeps and the code
>continues to execute resulting in NOTHING.
>
> Can anyone shed some light here.
>
> Thanks,
>
> Sandeep
>
> PS: I had read the following from the pfcguide web site.
> ----------------------------------------------------------------
> ### When I change rows my updates are lost. ###
>
> - Contributed by Sharon Buntz
>
> This is a drawback of using the Retrieval style of the Linkage service. And it is a
>sticky problem to try to code around, but it can be done.
>
> *** What is it :) ***
>
> The problem is that there is no RowFocusChanging event in order to trap that the
>row's focus is changing to test if you should ask the user if they would like to save
>their changes.
>
> One option is to simply switch to using the Filter style of the Linkage service.
>This is a viable solution for cases when you are not forced into using the Retrieval
>style because of very large
> quantities of data that would need to be retrieved.
>
> On the bright side, please note that in PowerBuilder 6.0, there will be a
>RowFocusChanging event. And also, in PFC 6.0, this problem will be fixed as well,
>using the new RowFocusChanging event.
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