1-) C# RMOS - gridview multiselect yapma

select convert(bit,'0') as sec

private void CheckedChanged(object sender, System.EventArgs e)

        {

            CheckEdit edit = sender as CheckEdit;

            string files_id = gridView_files.GetFocusedRowCellValue("files_id").ToString();

            RHMesaj.alertMesaj(files_id + "-" + edit.Checked);

        }

 foreach (GridColumn item in gridView_files.Columns)

            {

                switch (item.FieldName)

                {

                    case "sec":

                        item.Caption = "Seç";

                        RepositoryItemCheckEdit rep_sec = new RepositoryItemCheckEdit();

                        rep_sec.CheckedChanged += new EventHandler(CheckedChanged);

                        item.ColumnEdit = rep_sec;

                        break;

}}