public void CargarServicios() { List<Service> listService = new List<Service>(); WSService wsservice = new WSService(); listService = wsservice.ListService(); this.service.DataSource = listService; this.service.DataValueField = "idService"; this.service.DataTextField = "name"; this.service.DataBind(); this.service.Items.Insert(0, new ListItem("-- SELECCIONE EL SERVICIO --")); }