C#中操作Oracle时的SQL语句参数的用法

OracleTransaction myTrans ;
            conn.Open();
            myTrans =conn.BeginTransaction(IsolationLevel.ReadCommitted);
            comm.Transaction =myTrans;
            comm.CommandText="insert into TagInfo(TagID,AutoSubSysID,TagCode,TagName,TagType,TagValueType,TagMaxValue,TagMinValue,TagAlartMax";
            comm.CommandText+="                   ,TagAlartMin,TagSaveInterval,TagSaveIgBand,ValidTerm,TimeStampMode,TagAlartPos";
            comm.CommandText+="                     ,TagAlartPosDes,Description) ";
            comm.CommandText+="             values(trim(to_char(SeqTagID.Nextval ,'0000000000')),'0000000100',:TagCode,:TagName,:TagType,:TagValueType,:TagMaxValue,:TagMinValue,:TagAlartMax";
            comm.CommandText+="                     ,:TagAlartMin,:TagSaveInterval,:TagSaveIgBand,:ValidTerm,:TimeStampMode,:TagAlartPos";
            comm.CommandText+="                     ,:TagAlartPosDes,:Description)";

                        comm.ExecuteNonQuery();