自己写的针对xml操作的类

/**/ /// <copyright> 青岛英网咨询技术有限公司1999-2007 </copyright>
/// <version> 1.0 </version>
/// <author> zhangl </author>
/// <email> zhangl@hrbanlv.com </email>
/// <logdate="2007-08-06"> 创建 </log>

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;
using System.Xml.XPath;
using System.IO;
using System.Data.SqlClient;

/**/ /// <summary>
/// XmlOperate的摘要说明
/// </summary>
public class XmlOperate
... {
private string datafile = "" ;
private string id = "" ;
private string dbname = "" ;
private string backdate = "" ;

public string DataFile
... {
set ... {
datafile = value;
}
}
public string ID
... {
set
... {
id = value;
}
}
public string DbName
... {
set
... {
dbname = value;
}
}

public string BackDate
... {
set
... {
backdate = value;
}
}

/**/ /// <summary>
/// 构造函数
/// </summary>
public XmlOperate()
... {

}

/**/ /// <summary>
/// 构造带参数的构造函数
/// </summary>
/// <paramname="strdbname"></param>
/// <paramname="strbackdate"></param>
///
public XmlOperate( string strid, string strdbname, string strbackdate)
... {
this .id = strid;
this .dbname = strdbname;
this .backdate = strbackdate;
}


读xml操作 #region 读xml操作
public DataViewXmlRead()
... {
StreamReadertyj = new StreamReader(datafile); // 使用streamReader读取数据
XmlDataDocumentdatadoc = new XmlDataDocument(); // 创建该对象为了读取Xml
datadoc.DataSet.ReadXml(tyj); // 使用xmldocument对象把读取的xml数据放到dataset
DataViewdv = datadoc.DataSet.Tables[ 0 ].DefaultView;
datadoc = null ; // 释放对象占用的资源
tyj.Close();
return dv;
}
#endregion


写xml操作 #region 写xml操作

public bool XmlWrite()
... {

try
... {
if (File.Exists(datafile))
... {
XmlTextReaderxtr = new XmlTextReader(datafile);
XmlDocumentxd = new XmlDocument();
xd.Load(xtr);
xtr.Close();
XmlNodexn = xd.GetElementsByTagName( " baks " ).Item( 0 );
XmlNodexn1 = xd.CreateNode(XmlNodeType.Element, " bak " , "" );
XmlNodexn2 = xd.CreateNode(XmlNodeType.Element, " id " , "" );
xn2.InnerText = id;
XmlNodexn3 = xd.CreateNode(XmlNodeType.Element, " dbname " , "" );
xn3.InnerText = dbname;
XmlNodexn4 = xd.CreateNode(XmlNodeType.Element, " backdate " , "" );
xn4.InnerText = backdate;
xn.AppendChild(xn1);
xn1.AppendChild(xn2);
xn1.AppendChild(xn3);
xn1.AppendChild(xn4);
xd.Save(datafile);
return true ;
}
else
... {
FileStreamfs = File.Create(datafile); // 创建xml文件
fs.Close();
StreamWritersw = new StreamWriter(datafile, true ,System.Text.Encoding.GetEncoding( " gb2312 " ));
XmlTextReaderxtr = new XmlTextReader(datafile);
XmlDocumentxd = new XmlDocument();
xd.Load(xtr);
xtr.Close();
XmlNodexn = xd.GetElementsByTagName( " baks " ).Item( 0 );
XmlNodexn1 = xd.CreateNode(XmlNodeType.Element, " bak " , "" );
XmlNodexn2 = xd.CreateNode(XmlNodeType.Element, " id " , "" );
xn2.InnerText = id;
XmlNodexn3 = xd.CreateNode(XmlNodeType.Element, " dbname " , "" );
xn3.InnerText = dbname;
XmlNodexn4 = xd.CreateNode(XmlNodeType.Element, " backdate " , "" );
xn4.InnerText = backdate;
xn.AppendChild(xn1);
xn1.AppendChild(xn2);
xn1.AppendChild(xn3);
xn1.AppendChild(xn4);
xd.Save(datafile);
return true ;
}
}
catch
... {
return false ;
}
}
#endregion

删除xml节点操作 #region 删除xml节点操作

public void XmlDelete()
... {
XmlDocumentdocument = new XmlDocument();
document.Load(datafile);
XmlNodeListnodelist = document.SelectSingleNode( " baks " ).ChildNodes;
foreach (XmlNodenode in nodelist)
... {
XmlElementxe = (XmlElement)node; // 将子节点类型转换为XmlElement类型
if (xe.Name == " bak " )
... {
XmlNodeListnls = xe.ChildNodes;
foreach (XmlNodexn1 in nls)
... {
if (xn1.InnerText == dbname)
... {

xe.ParentNode.RemoveChild(xe); // 移除xe节点--重点
}
}
}
}
document.Save(datafile); // 保存xml文件
}
#endregion

}

<? xmlversion="1.0"encoding="utf-8" ?>
< baks >
< bak >
< id > 1 </ id >
< dbname > ehrdb_db_2007080713420096.BAK </ dbname >
< backdate > 2007.08.07 </ backdate >
</ bak >
< bak >
< id > 2 </ id >
< dbname > ehrdb_db_2007080713402905.BAK </ dbname >
< backdate > 2007.08.07 </ backdate >
</ bak >
</ baks >