private void DeleteItem()
{
OperationResult objOperationResult = new OperationResult();
// Obtener los IDs de la fila seleccionada
string pstrAttentionInAreaId = Convert.ToString(grd.DataKeys[grd.SelectedRowIndex][0]);
// Delete the item
_objNodeBL.DeleteAttentionInAreaByNode(ref objOperationResult, pstrAttentionInAreaId, ((ClientSession)Session["objClientSession"]).GetAsList());
Session["strFilterExpression"] = "";
}