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Master-Detail with auto-generated Detail rows, refresh problem

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GridView
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Greg
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Greg asked on 07 Jul 2014, 07:58 PM
I have a master detail screen using gridviews.

When a new master row is saved, the server creates detail rows, but the detail gridview does not display/retrieve these new rows until a different master row is selected and then the new master row is again selected.

How can I get the detail gridview to retrieve these new rows as soon as the save is done?

Putting detailDataSource.Refresh() after the masterDataSource.SubmitChanges() does not work.

Thanks. (This is in a MVVM system btw).

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Dimitrina
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answered on 08 Jul 2014, 02:30 PM
Hello,

You will have to recreate the row in order to have the row details added to it. Would you try invoking a RadGridView.Rebind()?

Regards,
Didie
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Greg
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answered on 08 Jul 2014, 05:43 PM
I am not sure how to force a Rebind in my viewmodel event:


private void RowEditEnded(GridViewRowEditEndedEventArgs args)
{
  if (!args.ChangesActuallyMade())
  {
    return;
  }

  // Loans is the QueryableDataServiceCollectionView
  Loans.SubmitChanges();
}

How do I reference the RadGridView that triggered this event so I can call Rebind after the SubmitChanges?
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Dimitrina
Telerik team
answered on 10 Jul 2014, 08:31 AM
Hello,

You need a reference of RadGridView to invoke such a reset invoking its Rebind() method.
Another way would be to raise a CollectionChanged notification for the row you create detail rows for. Is it possible for you to remove the entire row and then insert/add it again after you updated it accordingly?

Regards,
Didie
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Greg
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answered on 10 Jul 2014, 02:06 PM
I am new to MVVM and Telerik, so please excuse these basic questions:

- How do you get a reference to an object in the view from with the viewmodel? (My viewmodel does not have a direct reference to the view).

- How would I raise the CollectionChanged notification as you suggest?

Thanks.
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Greg
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answered on 10 Jul 2014, 04:13 PM
I resolved this problem by resetting the FilterDescriptor used by the child gridviews in the parent gridview's QueryableDataServiceCollectionView's OnSubmittedChanges event.

Even if the resulting filter matches the pre-existing filter, it triggers the refresh I needed.
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Yoan
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answered on 14 Jul 2014, 03:40 PM
Hi,

Thank you for the update. I am glad to hear you have resolved the issue.

Regards,
Yoan
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