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Format Group Header Cell Content

Updated on Oct 1, 2025

By handling the ElementExportingToDocument of the RadGridView control, you can specify a custom format for the exported group header cells. For example, you can export the captions of the aggregate results with their formatted value (based on the ResultFormatString of the function) as well as the number of items in the group.

Example 1: Custom Group Header Cell Export Content

C#
    private void Grid_ElementExportingToDocument(object sender, GridViewElementExportingToDocumentEventArgs e)
    {
        if (e.Element == ExportElement.GroupHeaderCell)
        {
            var group = e.DataContext as QueryableCollectionViewGroup;
            string value = group.Key.ToString() + " (" + group.ItemCount + " items)" + new String(' ', 4);
            foreach (var result in group.AggregateResults)
            {
                value += result.Caption + " " + result.FormattedValue + new String(' ', 4);
            }

            e.Value = value;
        }
    }
VB.NET
	Private Sub Grid_ElementExportingToDocument(ByVal sender As Object, ByVal e As GridViewElementExportingToDocumentEventArgs)
		If e.Element = ExportElement.GroupHeaderCell Then
			Dim group = TryCast(e.DataContext, QueryableCollectionViewGroup)
			Dim value As String = group.Key.ToString() & " (" & group.ItemCount & " items)" & New String(" "c, 4)
			For Each result In group.AggregateResults
				value &= result.Caption & " " & result.FormattedValue + New String(" "c, 4)
			Next result

			e.Value = value
		End If
	End Sub

Custom Group Header Cell Export Content

Format Group Header Cell Content

See Also