SqlCommandBuilder类批量更新excel或者CSV数据的方法

/// <param name="table">准备更新的DataTable新数据</param>
 /// <param name="TableName">对应要更新的数据库表名</param>
 /// <param name="primaryKeyName">对应要更新的数据库表的主键名</param>
 /// <param name="columnsName">对应要更新的列的列名集合</param>
 /// <param name="limitColumns">需要在ＳＱＬ的ＷＨＥＲＥ条件中限定的条件字符串，可为空。</param>
 /// <param name="onceUpdateNumber">每次往返处理的行数</param>
 /// <returns>返回更新的行数</returns>
 public static int Update(DataTable table, string TableName, string primaryKeyName, string[] columnsName, string limitWhere,int onceUpdateNumber)
 {
 if (string.IsNullOrEmpty(TableName)) return 0;
 if (string.IsNullOrEmpty(primaryKeyName)) return 0;
 if (columnsName == null || columnsName.Length <= 0) return 0;
 DataSet ds = new DataSet();
 ds.Tables.Add(table);
 int result = 0;
 using (SqlConnection sqlconn = new SqlConnection(SqlHelper.ConnString))
 {
 sqlconn.Open();

 //使用加强读写锁事务 
 SqlTransaction tran = sqlconn.BeginTransaction(IsolationLevel.ReadCommitted);
 try
 {
 foreach (DataRow dr in ds.Tables[0].Rows)
 {
 //所有行设为修改状态 
 dr.SetModified();
 }
 //为Adapter定位目标表 
 SqlCommand cmd = new SqlCommand(string.Format("select * from {0} where {1}", TableName,limitWhere), sqlconn, tran);
 SqlDataAdapter da = new SqlDataAdapter(cmd);
 SqlCommandBuilder sqlCmdBuilder = new SqlCommandBuilder(da);
 da.AcceptChangesDuringUpdate = false;
 string columnsUpdateSql = "";
 SqlParameter[] paras = new SqlParameter[columnsName.Length];
 //需要更新的列设置参数是,参数名为"@+列名"
 for (int i = 0; i < columnsName.Length; i++)
 {
 //此处拼接要更新的列名及其参数值
 columnsUpdateSql += ("[" + columnsName[i] + "]" + "=@" + columnsName[i] + ",");
 paras[i] = new SqlParameter("@" + columnsName[i], columnsName[i]);
 }
 if (!string.IsNullOrEmpty(columnsUpdateSql))
 {
 //此处去掉拼接处最后一个","
 columnsUpdateSql = columnsUpdateSql.Remove(columnsUpdateSql.Length - 1);
 }
 //此处生成where条件语句
 string limitSql = ("[" + primaryKeyName + "]" + "=@" + primaryKeyName);
 SqlCommand updateCmd = new SqlCommand(string.Format(" UPDATE [{0}] SET {1} WHERE {2} ", TableName, columnsUpdateSql, limitSql));
 //不修改源DataTable 
 updateCmd.UpdatedRowSource = UpdateRowSource.None;
 da.UpdateCommand = updateCmd;
 da.UpdateCommand.Parameters.AddRange(paras);
 da.UpdateCommand.Parameters.Add("@" + primaryKeyName, primaryKeyName);
 //每次往返处理的行数
 da.UpdateBatchSize = onceUpdateNumber;
 result = da.Update(ds,TableName);
 ds.AcceptChanges();
 tran.Commit();

 }
 catch
 {
 tran.Rollback();
 }
 finally
 {
 sqlconn.Dispose();
 sqlconn.Close();
 }


 }
 return result;
 }