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Simon
280
Only show expansion indicator when there are children
posted

It seems that in order to only show expansion indicator if there actually is child records to show I have to hook InitializeRecord event and handle it like so:


        private void gridFields_InitializeRecord(object sender, InitializeRecordEventArgs e) {

            if (e.Record != null) {
                if (!e.Record.HasChildren) {
                    e.Record.ExpansionIndicatorVisibility = Visibility.Hidden;
                } else {
                    e.Record.ExpansionIndicatorVisibility = Visibility.Visible;
                }
            }
        }

My grid is bound to a ListCollectionView, and the individual items contains another ListCollectionView, say ChildrenView.

 

Now if I from my view model, add an item to ChildrenView (that did not have any items, so that expansion indicator initially is hidden), how do I get the ExpansionIndicator to reappear?

v.9.1

  • 9694
    posted

    Hello,

    There is a method in the Record class that will reset the ExpansionIndicatorVisibility property:

    ResetExpansionIndicatorVisibility(). 
    This will clear the override that was applied in your gridFields_InitializeRecord method.

    You can try resetting this in the RecordUpdated event.

    Please let me know if you need further help in this.

    Thanks!