protected void grv_responsibility_HtmlRowPrepared(object sender, ASPxGridViewTableRowEventArgs e)
        {
            if (e.RowType == GridViewRowType.Group)
            {
                ASPxGridView grid      = sender as ASPxGridView;
                ASPxLabel    groupname = grid.FindGroupRowTemplateControl(e.VisibleIndex, "lbl_groupname") as ASPxLabel;
                ReadOnlyCollection <GridViewDataColumn> groupcollection = grid.GetGroupedColumns();
                foreach (GridViewDataColumn column in groupcollection)
                {
                    groupname.Text = column.Caption + ": " + grid.GetRowValues(e.VisibleIndex, column.FieldName);
                }

                ASPxButton button = new ASPxButton();
            }
        }