asp.net 防注入式攻击

 网上有许多防SQL注入式攻击的方法。我使用将值用参数传入形式。相关代码如下：

   /// <summary>
   /// 执行参数
   /// </summary>
   /// <param name="asSql">SQL语句</param>
   /// <param name="asPlList">参数列表</param>
    public static void ExecuteDMLParameterSQL(string asSql, sttSqlParameterList[] asPlList)
    {
        sConnectionString = ConfigurationManager.AppSettings.Get("UserConnection");
        OracleConnection ocConnection = new OracleConnection(sConnectionString);
        ocConnection.Open();
        OracleCommand ocCommand = ocConnection.CreateCommand();
        ocCommand.CommandType = CommandType.Text;
        ocCommand.CommandText = asSql;
        for (int i = 0; i < asPlList.Length; i++)
        {
            OracleParameter opName = new OracleParameter();
            opName.ParameterName = asPlList[i].Name;
            switch (asPlList[i].Type)
            {
                case "string":
                    opName.OracleType = OracleType.VarChar;
                    break;
                default:
                    opName.OracleType = OracleType.VarChar;
                    break;
            }
            opName.Value = asPlList[i].Value;
            ocCommand.Parameters.Add(opName);
        } 
        int iResult = (int)ocCommand.ExecuteNonQuery();
        ocCommand.Dispose();
        ocConnection.Close();
        ocConnection.Dispose();
    }


    /// <summary>
    /// 参数结构,用于执行参数语句
    /// </summary>
    public struct sttSqlParameterList
    {
        private string sName;
        private string sType;
        private string sValue;

        /// <summary>
        /// 构造函数(初始化值)
        /// </summary>
        /// <param name="asName">参数名</param>
        /// <param name="asType">参数类型(暂时只针对string型的值)</param>
        /// <param name="asValue">参数值</param>
        public sttSqlParameterList(string asName, string asType, string asValue)
        {
            sName = asName;
            sType = asType;
            sValue = asValue;
        }

        /// <summary>
        /// 参数名(与SQL语句中的参数名相同,但不带:号)
        /// </summary>
        public string Name
        {
            get
            {
                return sName;
            }
            set
            {
                sName = value;
            }
        }

        /// <summary>
        /// 参数类型(本参数暂时只接受string型)
        /// </summary>
        public string Type
        {
            get
            {               
                return sType;
            }
            set
            {
                sType = value;
            }
        }




        /// <summary>
        /// 参数值,与参数类型对应
        /// </summary>
        public string Value
        {
            get
            {
                return sValue;
            }
            set
            {
                sValue = value;
            }
        }
    }
  

 调用方法为：

 string sSql = "update HP_REQUIREMENT "
        + " set RqtGuage=16,RqtUpdateDate=to_date('{1}','yyyy.MM.dd'),"
        + " RqtCheckerID={2},"
        + " RqtCheckerEmpID='{3}',"
        + "RqtDevelopExplain=:CheckerExplain," //CheckerExplain为参数名，与参数列表中的Name相对应
        + " RqtAnalystHour={4},"
        + " RqtDevelopWorkload={5},"
        + " RqtTestHour={6},"
        + " RqtTotoalHour={7}"
        + " where RqtID='{0}'";
        sSql = string.Format(sSql, sMainID, sUpdateDate, sCheckerID, sCheckerEmpID, sAnalystHour, sWorkLoad, sTestHour, sTotalHour);

        //给参数赋值(这里只有一个参数)
        sttSqlParameterList[] sptList = new sttSqlParameterList[1];
        sptList[0].Name = "CheckerExplain";
        sptList[0].Type = "string";
        sptList[0].Value = sCheckerExplain;
        clsHpDbManage.ExecuteDMLParameterSQL(sSql, sptList);