C# + Oracel 批量插入数据（List，Array等）

static OracleConnection OpenConn()
        {
            string connstr = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=***.***.***.***)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=***)));Persist Security Info=True;User ID=***;Password=***;";
            OracleConnection conn = new OracleConnection();
            conn.ConnectionString = connstr;
            conn.Open();
            return conn;
        }
public bool insert(string tableName, IList list, int length)
        {
            string sql = "INSERT INTO " + tableName + "(XH,MMSI,UTC,LAT,LON,SOG,COG,UDATE) values(SEQ_SHIPPOINT.Nextval,:MMSI,:UTC,:LAT,:LON,:SOG,:COG,:UDATE)";
            //string sql = "INSERT INTO " + tableName + "({0}) values(SEQ_SHIPPOINT.Nextval,{1})";
            using (OracleConnection conn = OpenConn())
            {
                try
                {                   
                    int returnrow = 0;
                    int recordCount = list.Count;
                    using (OracleCommand cmd = conn.CreateCommand())
                    {
                        cmd.CommandText = sql;
                        cmd.ArrayBindCount = recordCount;  //指定单次需要处理的条数
                        //注意，这里的值是数组
                        cmd.Parameters.Add(new OracleParameter(":MMSI", OracleDbType.Varchar2, ParameterDirection.Input)).Value = list.Select(x => x.mmsi).ToArray(); //item.Name;
                        cmd.Parameters.Add(new OracleParameter(":UTC", OracleDbType.Long, ParameterDirection.Input)).Value = list.Select(x => x.utc).ToArray();
                        cmd.Parameters.Add(new OracleParameter(":LAT", OracleDbType.Long, ParameterDirection.Input)).Value = list.Select(x => x.lat).ToArray();
                        cmd.Parameters.Add(new OracleParameter(":LON", OracleDbType.Long, ParameterDirection.Input)).Value = list.Select(x => x.lon).ToArray();
                        cmd.Parameters.Add(new OracleParameter(":SOG", OracleDbType.Long, ParameterDirection.Input)).Value = list.Select(x => x.sog).ToArray();
                        cmd.Parameters.Add(new OracleParameter(":COG", OracleDbType.Long, ParameterDirection.Input)).Value = list.Select(x => x.cog).ToArray();
                        cmd.Parameters.Add(new OracleParameter(":UDATE", OracleDbType.Date, ParameterDirection.Input)).Value = list.Select(x => x.udate).ToArray();
                        returnrow = cmd.ExecuteNonQuery();
                    }                   
                    return returnrow > 0;
                }
                catch (Exception ex)
                {
                    //LogHelper.WriteErrLog("insertOracle", ex.Message);
                    return false;
                }
            }
        }