public bool isReduplicated(string title) { SqlParameter[] Params = new SqlParameter[1]; DataBase DB = new DataBase(); Params[0] = DB.MakeInParam("@Title", SqlDbType.VarChar, 1000, title); //��Ŀ if (DB.GetRecordCount("select count(*) from QuestionProblem where Title='" + title + "' ") != 0) return true; else return false; }