GridViewGroupRow persistence on data refresh

[Diptimaya]

Hi Team,

I have this specific requirement where, on data refresh the expanded GridViewGroupRow has to be persisted. I have tried the persistence framework for this, which didn't work.

I tried getting the expanded group rows on event GroupRowIsExpandedChanged; I was successful in getting the expanded rows.

To expand the group rows; I tried using ChildrenOfType<GridViewGroupRow>; which gives the count always zero (even the grid is grouped).

Is there any event for GridViewGroupGroupRow Loaded; where I could check the distinct group row and expand it?

Or do you have a better solution?

Thanks

[Alexander]

Hi,

has there been any progress on this issue? We have exactly the same problem...

Cheers,
Alexander

[Dimitrina]

Hi,

To achieve your goal, first of all you need to store all expanded groups - RadGridView.GroupRowIsExpanded is the perfect event for that. I have pasted a sample code below although it is not the "full" solution, since one group could be expanded and collapsed several times. You will need to handle all the possible cases.

public MainPage()
{
    InitializeComponent();
    this.radGridView.GroupRowIsExpandedChanged += newEventHandler<Telerik.Windows.Controls.GridView.GroupRowEventArgs>(radGridView_GroupRowIsExpandedChanged);
}

List<object> expandedGroups = new List<object>();

void radGridView_GroupRowIsExpandedChanged(object sender, Telerik.Windows.Controls.GridView.GroupRowEventArgs e)
{
    if (e.Row.IsExpanded)
    {
        this.expandedGroups.Add(e.Row.Group.Key);
    }
}

Then, based on the values you have saved in the expandedGroups collection, you should expand each group with the GridView.ExpandGroup method. This should be done after the data has been reloaded.

Please try this approach and let me know if you have met any problems.

Regards,
Didie
Telerik