What is the best way to do this in code?  I have tried the following:

private void AllergyGrid_InitializeRow(object sender, Infragistics.Controls.Grids.InitializeRowEventArgs e)
        {
            if (e.Row != null)
            {
                if (e.Row.RowType == Infragistics.Controls.Grids.RowType.GroupByRow)
                {
                    e.Row.IsExpanded = true;
                }
            }
        }
 
        private void AllergyGrid_Loaded(object sender, RoutedEventArgs e)
        {
            foreach (Infragistics.Controls.Grids.Row row in ((Infragistics.Controls.Grids.XamGrid)sender).Rows)
            {
                if (row.RowType == Infragistics.Controls.Grids.RowType.GroupByRow)
                {
                    row.IsExpanded = true;
                }
            }
        }

Neither is working.

I'm sorry, i should have provided that code before:

You can use the GroupByCollectionChanged event:

Something like: 

private void grid_GroupByCollectionChanged(object sender, GroupByCollectionChangedEventArgs e)

        {

            if (e.NewGroupedColumns != null && e.NewGroupedColumns.Count > 0)

            {

                foreach (Row r in grid.Rows)

                {

                    r.IsExpanded = true;

                }

            }

        }

Hope this helps,

-SteveZ 

Thanks, that was the next event I was trying.

Still seems to be a problem.  The event gets fired before the data is loaded asynchronously.  So there are no rows when the event is fired.

private void AllergyGrid_GroupByCollectionChanged(object sender, Infragistics.Controls.Grids.GroupByCollectionChangedEventArgs e)
        {
            if (e.NewGroupedColumns != null && e.NewGroupedColumns.Count > 0)
            {
                foreach (Infragistics.Controls.Grids.Row r in ((Infragistics.Controls.Grids.XamGrid)sender).Rows)
                {
                    r.IsExpanded = true;
                }
            }
 
            
        }

I ended up just creating my own event.  I raise it when data has finished loading from my viewmodel and handle it in my view. 

Doing something as simple as defaulting my groups to expanded should not require this.

Hi Yoann, 

We haven't added any additional functionality for this yet, so for now your best option is to follow the approach that dkrecker suggested.

-SteveZ

Hi,

Someone can help me please?

Hi,

I have the same problem, how can I solve it please?

Regards,

Yoann

Hi dkrecker,

I have logged a Feature Request for this functionality, with an ID number of FR12799.  I will follow up with you in a private support case.

Thanks,