xml操作
转:http://www.cnblogs.com/chnboy/archive/2009/04/02/1427652.html
经过这些日子以来,我根据上篇随笔中读写程序配置文件节点的方法来扩展了其功能,并写了这个XML文档的操作管理帮助类XMLHelper出来, 这个XMLHelper类中包括了XML文档的创建,文档节点和属性的读取,添加,修改,删除的方法功能的实现,有兴趣的朋友,可以进来看看,所有代码都 在WebForm和WinForm中调试通过.
参考我的上篇随笔:关于C#和ASP.NET中对App.config和Web.config文件里的[appSettings]和[connectionStrings]节点进行新增、修改、删除和读取相关的操作
这是下面要操作的XML文档:
<?xml version="1.0" encoding="utf-8"?>
<books>
<book id="1" ISDN="1001001001">
<name>我的世界我的梦</name>
<author>姚明</author>
<date>2008-09-23</date>
</book>
<book id="2" ISDN="2002000230032">
<name>围城</name>
<author>钱钟书</author>
<date>2008-09-23</date>
</book>
<book id="3" />
</books>
以下是XMLHelper文档操作帮助类代码:
XMLHelper下载:http://i.cnblogs.com/Files.aspx
1.创建XML文档:
//这是XML文档根节点名
string rootNodeName = "books";
//这是XML文档物理文件名(包含物理路径)
string xmlFileName = Application.StartupPath + @"\book.xml";
XMLHelper.CreateXmlDocument(xmlFileName, rootNodeName, "1.0", "utf-8", null);
MessageBox.Show("XML文档创建成功:" + xmlFileName);
string rootNodeName = "books";
//这是XML文档物理文件名(包含物理路径)
string xmlFileName = Application.StartupPath + @"\book.xml";
XMLHelper.CreateXmlDocument(xmlFileName, rootNodeName, "1.0", "utf-8", null);
MessageBox.Show("XML文档创建成功:" + xmlFileName);
2.向XML文档中添加一个新节点:
string xmlFileName = Application.StartupPath + @"\book.xml";
string xpath = "/books"; //这是新节点的父节点路径
string nodename = "book"; //这是新节点名称,在父节点下新增
string nodetext = "这是新节点中的文本值";
bool isSuccess = XMLHelper.CreateOrUpdateXmlNodeByXPath(xmlFileName, xpath, nodename, nodetext);
MessageBox.Show("XML节点添加或更新成功:" + isSuccess.ToString());
string xpath = "/books"; //这是新节点的父节点路径
string nodename = "book"; //这是新节点名称,在父节点下新增
string nodetext = "这是新节点中的文本值";
bool isSuccess = XMLHelper.CreateOrUpdateXmlNodeByXPath(xmlFileName, xpath, nodename, nodetext);
MessageBox.Show("XML节点添加或更新成功:" + isSuccess.ToString());
3.向XML文档中的子节点中新增或修改(如果存在则修改)一个子节点,比如name,author,date节点等:
string xmlFileName = Application.StartupPath + @"\book.xml";
string xpath = "/books/book"; //这是新子节点的父节点路径
string nodename = "name"; //这是新子节点名称,在父节点下新增
string nodetext = "我的世界我的梦";
bool isSuccess = XMLHelper.CreateOrUpdateXmlNodeByXPath(xmlFileName, xpath, nodename, nodetext);
MessageBox.Show("XML节点添加或更新成功:" + isSuccess.ToString());
string xpath = "/books/book"; //这是新子节点的父节点路径
string nodename = "name"; //这是新子节点名称,在父节点下新增
string nodetext = "我的世界我的梦";
bool isSuccess = XMLHelper.CreateOrUpdateXmlNodeByXPath(xmlFileName, xpath, nodename, nodetext);
MessageBox.Show("XML节点添加或更新成功:" + isSuccess.ToString());
4. 向XML文档中的子节点中新增或修改(如果存在则修改)一个子节点属性,比如id,ISDN属性等:
string xmlFileName = Application.StartupPath + @"\book.xml";
string xpath = "/books/book"; //要新增属性的节点
string attributeName = "id"; //新属性名称,ISDN号也是这么新增的
string attributeValue = "1"; //新属性值
bool isSuccess = XMLHelper.CreateOrUpdateXmlAttributeByXPath(xmlFileName, xpath, attributeName, attributeValue);
MessageBox.Show("XML属性添加或更新成功:" + isSuccess.ToString());
string xpath = "/books/book"; //要新增属性的节点
string attributeName = "id"; //新属性名称,ISDN号也是这么新增的
string attributeValue = "1"; //新属性值
bool isSuccess = XMLHelper.CreateOrUpdateXmlAttributeByXPath(xmlFileName, xpath, attributeName, attributeValue);
MessageBox.Show("XML属性添加或更新成功:" + isSuccess.ToString());
5. 删除XML文档中的子节点:
string xmlFileName = Application.StartupPath + @"\book.xml";
string xpath = "/books/book[@id='1']"; //要删除的id为1的book子节点
bool isSuccess = XMLHelper.DeleteXmlNodeByXPath(xmlFileName, xpath);
MessageBox.Show("XML节点删除成功:" + isSuccess.ToString());
string xpath = "/books/book[@id='1']"; //要删除的id为1的book子节点
bool isSuccess = XMLHelper.DeleteXmlNodeByXPath(xmlFileName, xpath);
MessageBox.Show("XML节点删除成功:" + isSuccess.ToString());
6. 删除XML文档中子节点的属性:
string xmlFileName = Application.StartupPath + @"\book.xml";
//删除id为2的book子节点中的ISDN属性
string xpath = "/books/book[@id='2']";
string attributeName = "ISDN";
bool isSuccess = XMLHelper.DeleteXmlAttributeByXPath(xmlFileName, xpath,attributeName);
MessageBox.Show("XML属性删除成功:" + isSuccess.ToString());
//删除id为2的book子节点中的ISDN属性
string xpath = "/books/book[@id='2']";
string attributeName = "ISDN";
bool isSuccess = XMLHelper.DeleteXmlAttributeByXPath(xmlFileName, xpath,attributeName);
MessageBox.Show("XML属性删除成功:" + isSuccess.ToString());
7.读取XML文档中的所有子节点:
string xmlFileName = Application.StartupPath + @"\book.xml";
//要读的id为1的book子节点
string xpath = "/books/book[@id='1']";
XmlNodeList nodeList = XMLHelper.GetXmlNodeListByXpath(xmlFileName, xpath);
string strAllNode = "";
//遍历节点中所有的子节点
foreach (XmlNode node in nodeList)
{
strAllNode += "\n name:" + node.Name + " InnerText:" + node.InnerText;
}
MessageBox.Show("XML节点中所有子节点有:" + strAllNode);
//要读的id为1的book子节点
string xpath = "/books/book[@id='1']";
XmlNodeList nodeList = XMLHelper.GetXmlNodeListByXpath(xmlFileName, xpath);
string strAllNode = "";
//遍历节点中所有的子节点
foreach (XmlNode node in nodeList)
{
strAllNode += "\n name:" + node.Name + " InnerText:" + node.InnerText;
}
MessageBox.Show("XML节点中所有子节点有:" + strAllNode);
8.其它的方法我就不一一的例举了,各位自己动手去尝试便知,关键的地方就是那个xpath的参数设置了,
这个是XML文档中xpath语法,大家去网上一查便明白,好了,我要休息去,明白偶还有很多的工作做...