static void Main(string[] args)        {            string sql = "insert into StudentC(Stuid, Stuname, Stupass) values(@Stuid,@Stuname,@Stupass)";            OracleParameter[] parameters =            {                new OracleParameter("@Stuid",OracleDbType.Int32,2),                new OracleParameter("@Stuname",OracleDbType.Varchar2,20),                new OracleParameter("@Stupass",OracleDbType.Varchar2,20)            };            parameters[0].Value = 3;            parameters[1].Value = "疯了";            parameters[2].Value = "studen";            Db_Helper_DG.ExecuteNonQuery(sql, CommandType.Text,parameters);        }

这是我最开始写的代码，讲@符号换成：，因为@符号是sqlserver中的写法。