C # XML operations: a class for processing XML files (1)

C # XML operations (7)
Chapter 4: common XML processing methods (1)
Since we can use DATASET to operate XML files, it is really convenient. He has the ability to use an XML file as a table. Why not?
Therefore, we can operate XML in the same way as a C # class to complete database-like operations:
Using System;
Using System. Text;
Using System. IO;
Using System. Xml;
Using System. Data;
Namespace XmlBook. Com. Sem. Tools
{
/// <Summary>
/// Copyright: Copyright by sem it Department
/// Version: 0.0.1
/// File: XmlBook. Com. Sem. Tools. XmlDataBase. cs
/// Objective: to provide some methods for processing XML as a database
/// By Ouyang Yuntian @
// Email: outrace@soueast-motor.com
/// Modify:
/// </Summary>
Public class XmlDataBase
 {
# Region private Member
Private string strDataFile = null;
/// <Summary>
/// Dataset
/// </Summary>
Private DataSet myDs = null;
/// <Summary>
/// Character filter array, for example, "id = '1' and userName = 'track '"
/// </Summary>
Private string strFilter = null;
/// <Summary>
/// Sort fields such as "id desc, userName"
/// </Summary>
Private string strSort = null;