问题 C＃方法锁定SQL Server表

我有一个C＃程序需要对SQL Server表执行一组批量更新（20k +）。由于其他用户可以通过Intranet网站一次更新这些记录，我们需要构建能够锁定表的C＃程序。一旦表被锁定以防止其他用户进行任何更改/搜索，我们将需要预先形成所请求的更新/插入。

由于我们正在处理这么多记录，我们无法使用 TransactionScope （这似乎是最简单的方式）因为我们的交易最终被处理了 MSDTC服务。我们需要使用另一种方法。

基于我在互联网上阅读的内容 SqlTransaction 对象似乎是最好的方法，但我无法让表锁定。当程序运行并且我单步执行下面的代码时，我仍然可以通过Intranet站点执行更新和搜索。

我的问题是双重的。我用的是 SqlTransaction 正常吗？如果是这样（或者即使没有）是否有更好的方法来获取表锁，允许当前程序运行以搜索和预先形成更新？

我希望在程序执行下面的代码时锁定表。

C＃

SqlConnection dbConnection = new SqlConnection(dbConn);

dbConnection.Open();

using (SqlTransaction transaction = dbConnection.BeginTransaction(IsolationLevel.Serializable))
{
    //Instantiate validation object with zip and channel values
    _allRecords = GetRecords();
    validation = new Validation();
    validation.SetLists(_allRecords);

    while (_reader.Read())
    {
        try
        {
            record = new ZipCodeTerritory();
            _errorMsg = string.Empty;

            //Convert row to ZipCodeTerritory type
            record.ChannelCode = _reader[0].ToString();
            record.DrmTerrDesc = _reader[1].ToString();
            record.IndDistrnId = _reader[2].ToString();
            record.StateCode = _reader[3].ToString().Trim();
            record.ZipCode = _reader[4].ToString().Trim();
            record.LastUpdateId = _reader[7].ToString();
            record.ErrorCodes = _reader[8].ToString();
            record.Status = _reader[9].ToString();
            record.LastUpdateDate = DateTime.Now;

            //Handle DateTime types separetly
            DateTime value = new DateTime();
            if (DateTime.TryParse(_reader[5].ToString(), out value))
            {
                record.EndDate = Convert.ToDateTime(_reader[5].ToString());
            }
            else
            {
                _errorMsg += "Invalid End Date; ";
            }
            if (DateTime.TryParse(_reader[6].ToString(), out value))
            {
                record.EffectiveDate = Convert.ToDateTime(_reader[6].ToString());
            }
            else
            {
                _errorMsg += "Invalid Effective Date; ";
            }

            //Do not process if we're missing LastUpdateId
            if (string.IsNullOrEmpty(record.LastUpdateId))
            {
                _errorMsg += "Missing last update Id; ";
            }

            //Make sure primary key is valid
            if (_reader[10] != DBNull.Value)
            {
                int id = 0;
                if (int.TryParse(_reader[10].ToString(), out id))
                {
                    record.Id = id;
                }
                else
                {
                    _errorMsg += "Invalid Id; ";
                }
            }

            //Validate business rules if data is properly formatted
            if (string.IsNullOrWhiteSpace(_errorMsg))
            {
                _errorMsg = validation.ValidateZipCode(record);
            }

            //Skip record if any errors found
            if (!string.IsNullOrWhiteSpace(_errorMsg))
            {
                _issues++;

                //Convert to ZipCodeError type in case we have data/formatting errors
                _errors.Add(new ZipCodeError(_reader), _errorMsg);
                continue;
            }
            else if (flag)
            {
                //Separate updates to appropriate list
                SendToUpdates(record);
            }
        }
        catch (Exception ex)
        {
            _errors.Add(new ZipCodeError(_reader), "Job crashed reading this record, please review all columns.");
            _issues++;
        }
    }//End while


    //Updates occur in one of three methods below. If I step through the code,
    //and stop the program here, before I enter any of the methods, and then 
    //make updates to the same records via our intranet site the changes
    //made on the site go through. No table locking has occured at this point. 
    if (flag)
    {
        if (_insertList.Count > 0)
        {
            Updates.Insert(_insertList, _errors);
        }
        if (_updateList.Count > 0)
        {
            _updates = Updates.Update(_updateList, _errors);
            _issues += _updateList.Count - _updates;
        }
        if (_autotermList.Count > 0)
        {
            //_autotermed = Updates.Update(_autotermList, _errors);
            _autotermed = Updates.UpdateWithReporting(_autotermList, _errors);
            _issues += _autotermList.Count - _autotermed;
        }
    } 

    transaction.Commit();
}