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)";

            OracleParameter [] parameterValue = {
                                                    new OracleParameter("TagCode",OracleType.VarChar,20)//0
                                                    ,new OracleParameter("TagName",OracleType.VarChar,40)
                                                    ,new OracleParameter("TagType",OracleType.Char,1)
                                                    ,new OracleParameter("TagValueType",OracleType.Char,1)
                                                    ,new OracleParameter("TagMaxValue",OracleType.Double)
                                                    ,new OracleParameter("TagMinValue",OracleType.Double)
                                                    ,new OracleParameter("TagAlartMax",OracleType.Double)
                                                    ,new OracleParameter("TagAlartMin",OracleType.Double)
                                                    ,new OracleParameter("TagSaveInterval",OracleType.Int32)
                                                    ,new OracleParameter("TagSaveIgBand",OracleType.Double)
                                                    ,new OracleParameter("ValidTerm",OracleType.Int32)
                                                    ,new OracleParameter("TimeStampMode",OracleType.Char,1)
                                                    ,new OracleParameter("TagAlartPos",OracleType.Int32)
                                                    ,new OracleParameter("TagAlartPosDes",OracleType.VarChar,40)
                                                    ,new OracleParameter("Description",OracleType.VarChar,80)
                                                };
            foreach(OracleParameter parameter in parameterValue) comm.Parameters.Add(parameter);

            int m,n;

            try
            {                
                        
                for(int j=3;j<=30;j++)
                {
                    m=j;
                    for(int i=1;i<12;i++)
                    {
                        n=i;
                        string TagID="";
                        string TagCode ="00100100010100";
                        string TagName ="RLS";

                        //TagCode
                        TagCode +=(j<10)?"0"+j.ToString():j.ToString();
                        TagCode +=(i<10)?"000"+i.ToString():"00"+i.ToString();                    
                        parameterValue[0].Value = TagCode;

                        //TagName
                        TagName +=(j<10)?"000"+j.ToString():"00"+j.ToString();
                        TagName +=(i<10)?"000"+i.ToString():"00"+i.ToString();
                        parameterValue[1].Value = TagName;

                        //TagType
                        parameterValue[2].Value =(i<5)? '0':'2';

                        //TagValueType
                        parameterValue[3].Value=(i==1 || i>=6)?'0':'1';
                                                        
                        //TagMaxValue
                        if(i==1 ||i==9)
                        {
                            parameterValue[4].Value=10000;
                        }
                        else if(i>=2 && i<6)
                        {
                            parameterValue[4].Value=1;
                        }
                        else if(i==6)
                        {
                            parameterValue[4].Value=3600;
                        }
                        else if(i==7)
                        {
                            parameterValue[4].Value=300;
                        }
                        else if(i==8)
                        {
                            parameterValue[4].Value=10;
                        }
                        else if(i==10)
                        {
                            parameterValue[4].Value=DBNull.Value;
                        }
                        else if(i==11)
                        {
                            parameterValue[4].Value=600;
                        }

                        //TagMinValue
                        if((i>=1 && i<6)||(i>=9 &&i<11))
                        {
                            parameterValue[5].Value=0;
                        }
                        else if(i==6)
                        {
                            parameterValue[5].Value=10;
                        }
                        else if(i==7 ||i==11)
                        {
                            parameterValue[5].Value=5;
                        }
                        else if(i==8)
                        {
                            parameterValue[5].Value=2;
                        }
                            
                        //TagAlartMax
                        parameterValue[6].IsNullable=true;
                        if((i==1))    parameterValue[6].Value=10000;
                        else parameterValue[6].Value=DBNull.Value;
                            
                        //TabAlartMin
                        parameterValue[7].Value =(i==1)?1:0;

                        //TagSaveInterval
                        if(i==1)
                        {
                            parameterValue[8].Value=10000;
                        }
                        else if(i>=2 && i<=5)
                        {
                            parameterValue[8].Value=20000;
                        }
                        else if(i>5)
                        {
                            parameterValue[8].Value=60000;
                        }

                        //TagSaveIgBand
                        if((i==1))    parameterValue[9].Value=2;
                        else parameterValue[9].Value=1;
                            
                        //ValidTerm
                        parameterValue[10].Value =(i==1)?60000:300000;

                        //TimeStampMode
                        parameterValue[11].Value="0";

                        //TagAlartPos
                        parameterValue[12].IsNullable=true;
                        if((i>=1) && (i<=4)) parameterValue[12].Value =0;
                        else parameterValue[12].Value =DBNull.Value;
                        //TagAlartPosDes
                        parameterValue[13].Value =(i>=2 && i<=4)?"异常":"";

                        //Description
                        parameterValue[14].Value ="";

                        comm.ExecuteNonQuery();