protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);

            foreach (GridViewRow row in StudyListControl.Rows)
            {
                if (row.RowType == DataControlRowType.DataRow)
                {
                    int   index = StudyListControl.PageIndex * StudyListControl.PageSize + row.RowIndex;
                    Study study = StudyList[index];

                    if (study != null)
                    {
                        row.Attributes.Add("instanceuid", study.StudyInstanceUid);
                        row.Attributes.Add("serverae", Partition.AeTitle);
                        StudyController controller = new StudyController();
                        bool            deleted    = controller.IsScheduledForDelete(study);
                        if (deleted)
                        {
                            row.Attributes.Add("deleted", "true");
                        }
                    }
                }
            }
        }