public JsonResult getSubCategory(int id) { sp_ilce ilce = new sp_ilce(); ilce.sehir_id = id; DataTable dt = database.GetDataFromDatabase(ilce); List <string> x = new List <string>(); for (int i = 0; i < dt.Rows.Count; i++) { x.Add(dt.Rows[i].ItemArray[0].ToString()); } return(Json(x, JsonRequestBehavior.AllowGet)); }