[Solved] How to hide empty Group Headers

[Jorge]

Hello,
I have a grid with Grouping enabled that is populated programatically, and during the ItemDataBound event, items that do not meet a certain criteria are set to Visible = False.
When the grid is rendered, there may be group headers that do not contain any items, if none of the items satisfied my criteria, so in those cases I need those groups to be hidden or removed. I only want the user to see and expand/collapse group headers that actually contain items within.

How can I do this?
Should I remove the items during ItemDataBound instead of setting them to Visible = False, so that no Group Header is generated? If so, what is the best way to do this?

Thanks in advance.

[Princy]

Hello Jorge,

I suppose you want to hide the GroupHeaderItems of the grid when these do not have any child items. If thats the case, then you can try out the following code:
c#:

 protected void RadGrid1_PreRender(object sender, EventArgs e)
    {
        foreach (GridGroupHeaderItem groupheader in RadGrid1.MasterTableView.GetItems(GridItemType.GroupHeader))
        {
            GridItem[] item = groupheader.GetChildItems();
            if (item.Length < 1)
            {
                groupheader.Visible = false;
            }
        }

    }

Thanks
Princy.

[Jorge]

Thank you much Princy.
While your sugestion did not solve the issue directly, it pointed me in the right direction.
Since the unwanted GridItems in given groups were only set to Visible = False in the previous event Sub, they were still present, so the GetChildItems count alone was not sufficient. Here is my modification, which worked like a charm:

    Protected Sub HideEmptyGroupHeader(ByVal Grid As RadGrid)
        For Each groupheader As GridGroupHeaderItem In Grid.MasterTableView.GetItems(GridItemType.GroupHeader)
            Dim flag As New Boolean

            For Each I As GridItem In groupheader.GetChildItems()
                If I.Visible Then
                    flag = True
                    Exit For
                End If
            Next

            groupheader.Visible = flag
        Next
    End Sub

Thanks again.
Jorge