求C# 获取xml某个节点值方法

/// <summary>

/// XmlDocument扩展类

///

/// 目的:用于优化和减少代码书写量

/// 备注:Element 译为:元素

/// Document 译为:文档

/// Node 译为:节点

/// </summary>

public class XmlDocumentExtender : XmlDocument

{

public XmlDocumentExtender()

: base()

{

}

#region 扩展的构造函数

#if NET1

public XmlDocumentExtender(XmlNameTable nt)

: base(new XmlImplementation())

{

}

#else

public XmlDocumentExtender(XmlNameTable nt)

: base(new XmlImplementation(nt))

{

}

#endif

#endregion

/// <summary>

/// 加载的文件名(含路径)

/// </summary>

/// <param name="filename"></param>

public override void Load(string filename)

{

if (MauniteCommonFileUtilsFileExists(filename))

{

baseLoad(filename);

}

else

{

throw new Exception("文件: " + filename + " 不存在!");

}

}

/// <summary>

/// 在指定的Xml元素下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlElement xmlElement, string childElementName, object childElementValue)

{

return AppendChildElementByNameValue(ref xmlElement, childElementName, childElementValue, false);

}

/// <summary>

/// 在指定的Xml元素下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <param name="IsCDataSection">是否是CDataSection类型的子元素</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlElement xmlElement, string childElementName, object childElementValue, bool IsCDataSection)

{

if ((xmlElement != null) && (xmlElementOwnerDocument != null))

{

//是否是CData类型Xml元素

if (IsCDataSection)

{

XmlCDataSection tempdata = xmlElementOwnerDocumentCreateCDataSection(childElementName);

tempdataInnerText = FiltrateControlCharacter(childElementValueToString());

XmlElement childXmlElement = xmlElementOwnerDocumentCreateElement(childElementName);

childXmlElementAppendChild(tempdata);

xmlElementAppendChild(childXmlElement);

}

else

{

XmlElement childXmlElement = xmlElementOwnerDocumentCreateElement(childElementName);

childXmlElementInnerText = FiltrateControlCharacter(childElementValueToString());

xmlElementAppendChild(childXmlElement);

}

return true;

}

else

{

return false;

}

}

/// <summary>

/// 在指定的Xml结点下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml节点</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlNode xmlNode, string childElementName, object childElementValue)

{

return AppendChildElementByNameValue(ref xmlNode, childElementName, childElementValue, false);

}

/// <summary>

/// 在指定的Xml结点下,添加子Xml元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml节点</param>

/// <param name="childElementName">要添加的Xml元素名称</param>

/// <param name="childElementValue">要添加的Xml元素值</param>

/// <param name="IsCDataSection">是否是CDataSection类型的子元素</param>

/// <returns></returns>

public bool AppendChildElementByNameValue(ref XmlNode xmlNode, string childElementName, object childElementValue, bool IsCDataSection)

{

if ((xmlNode != null) && (xmlNodeOwnerDocument != null))

{

//是否是CData类型Xml结点

if (IsCDataSection)

{

XmlCDataSection tempdata = xmlNodeOwnerDocumentCreateCDataSection(childElementName);

tempdataInnerText = FiltrateControlCharacter(childElementValueToString());

XmlElement childXmlElement = xmlNodeOwnerDocumentCreateElement(childElementName);

childXmlElementAppendChild(tempdata);

xmlNodeAppendChild(childXmlElement);

}

else

{

XmlElement childXmlElement = xmlNodeOwnerDocumentCreateElement(childElementName);

childXmlElementInnerText = FiltrateControlCharacter(childElementValueToString());

xmlNodeAppendChild(childXmlElement);

}

return true;

}

else

{

return false;

}

}

/// <summary>

/// 通过数据行向当前XML元素下追加子元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="dcc">当前数据表中的列集合</param>

/// <param name="dr">当前行数据</param>

/// <returns></returns>

public bool AppendChildElementByDataRow(ref XmlElement xmlElement, DataColumnCollection dcc, DataRow dr)

{

return AppendChildElementByDataRow(ref xmlElement, dcc, dr, null);

}

/// <summary>

/// 通过数据行向当前XML元素下追加子元素

/// </summary>

/// <param name="xmlElement">被追加子元素的Xml元素</param>

/// <param name="dcc">当前数据表中的列集合</param>

/// <param name="dr">当前行数据</param>

/// <param name="removecols">不会被追加的列名</param>

/// <returns></returns>

public bool AppendChildElementByDataRow(ref XmlElement xmlElement, DataColumnCollection dcc, DataRow dr, string removecols)

{

if((xmlElement != null)&&(xmlElementOwnerDocument != null))

{

foreach (DataColumn dc in dcc)

{

if ((removecols == null) ||

(removecols == "") ||

(("," + removecols + ",")ToLower()IndexOf("," + dcCaptionToLower() + ",") < 0))

{

XmlElement tempElement = xmlElementOwnerDocumentCreateElement(dcCaption);

tempElementInnerText = FiltrateControlCharacter(dr[dcCaption]ToString()Trim());

xmlElementAppendChild(tempElement);

}

}

return true;

}

else

{

return false;

}

}

/// <summary>

/// 实始化节点, 当节点存在则清除当前路径下的所有子结点, 如不存在则直接创建该结点

/// </summary>

/// <param name="xmlpath"></param>

/// <returns></returns>

public XmlNode InitializeNode(string xmlpath)

{

XmlNode xmlNode = thisSelectSingleNode(xmlpath);

if (xmlNode != null)

{

xmlNodeRemoveAll();

}

else

{

xmlNode = CreateNode(xmlpath);

}

return xmlNode;

}

/// <summary>

/// 删除指定路径下面的所有子结点和自身

/// </summary>

/// <param name="xmlpath">指定路径</param>

public void RemoveNodeAndChildNode(string xmlpath)

{

XmlNodeList xmlNodeList = thisSelectNodes(xmlpath);

if (xmlNodeListCount > 0)

{

foreach (XmlNode xn in xmlNodeList)

{

xnRemoveAll();

xnParentNodeRemoveChild(xn);

}

}

}

/// <summary>

/// 创建指定路径下的节点

/// </summary>

/// <param name="xmlpath">节点路径</param>

/// <returns></returns>

public XmlNode CreateNode(string xmlpath)

{

string[] xpathArray = xmlpathSplit('/');

string root = "";

XmlNode parentNode = this;

//建立相关节点

for (int i = 1; i < xpathArrayLength; i++)

{

XmlNode node = thisSelectSingleNode(root + "/" + xpathArray[i]);

// 如果当前路径不存在则建立,否则设置当前路径到它的子路径上

if (node == null)

{

XmlElement newElement = thisCreateElement(xpathArray[i]);

parentNodeAppendChild(newElement);

}

//设置低一级的路径

root = root + "/" + xpathArray[i];

parentNode = thisSelectSingleNode(root);

}

return parentNode;

}

/// <summary>

/// 得到指定路径的节点值

/// </summary>

/// <param name="xmlnode">要查找节点</param>

/// <param name="path">指定路径</param>

/// <returns></returns>

public string GetSingleNodeValue(XmlNode xmlnode, string path)

{

if (xmlnode == null)

{

return null;

}

if (xmlnodeSelectSingleNode(path) != null)

{

if (xmlnodeSelectSingleNode(path)LastChild != null)

{

return xmlnodeSelectSingleNode(path)LastChildValue;

}

else

{

return "";

}

}

return null;

}

/// <summary>

/// 过滤控制字符,包括0x00 - 0x08,0x0b - 0x0c,0x0e - 0x1f

/// </summary>

/// <param name="content">要过滤的内容</param>

/// <returns>过滤后的内容</returns>

private string FiltrateControlCharacter(string content)

{

return RegexReplace(content, "[\x00-\x08|\x0b-\x0c|\x0e-\x1f]", "");

}

}

创建解析器

SAXReader saxreader = new SAXReader();

读取文档

Document doc = saxreaderread(new File("url"));

获取根

Element root = docgetRootElement();

获取子节点

List<Element> list = rootelements();

Systemoutprintln(eelementText("name"));

Systemoutprintln(eelement("score")attributeValue("java"));

Reader reader = new InputStreamReader(con

getInputStream());

SAXReader sax = new SAXReader();

// saxsetEncoding("GBK");

Document document = saxread(reader);

documentsetXMLEncoding("GBK");

Element root = documentgetRootElement();

// Document doc = readerread(read);

// Element root = docgetRootElement();

readNode(root, "");

public static void readNode(Element root, String prefix) {

if (root == null) return;

// 获取属性

List<Attribute> attrs = rootattributes();

if (attrs != null && attrssize() > 0) {

Systemerrprint(prefix);

for (Attribute attr : attrs) {

Systemerrprint(attrgetValue() + " ");

}

Systemerrprintln();

}

// 获取他的子节点

List<Element> childNodes = rootelements();

prefix += "\t";

for (Element e : childNodes) {

//输出内容

Systemerrprintln(egetName()+":"+egetData());

readNode(e, prefix);

}

}

读取：

public void GetValue(string value,string date)

{

XmlDocument doc = new XmlDocument();

string path = "";

string title = "";

string body = "";

string bl = "";

path = SystemAppDomainCurrentDomainBaseDirectory;//获取文件路径

docLoad(path + "\\dbGuestxml");

XmlNode node = docSelectSingleNode("dbGuest");

XmlNodeList list = nodeChildNodes;

foreach (XmlNode xn in list)

{

XmlElement xe = (XmlElement)xn;

XmlNodeList xnf1 = xeChildNodes;

foreach (XmlNode xn2 in xnf1)

{

if (xeGetAttribute("days") == value && xeGetAttribute("date") == date)//读取属性

{

if (xn2Name == "title")//获得标题

{

title = xn2InnerText;

}

if (xn2Name == "body")//获得内容

{

body = xn2InnerText;

}

if (xn2Name == "bl")

{

bl = xn2InnerText;

}

}

}

}

lblmesText = title;

txtbodyText = body;

txtwcdText = bl;

}

保存：

private void btnComfrim_Click(object sender, EventArgs e)

{

string path = "";

// string title = "";

if (txtwcdText == "")

{

lblshowmesText = "任务完成度不能为空";

txtwcdFocus();

lblshowmesText = "";

}

XmlDocument doc = new XmlDocument();

try

{

path = SystemAppDomainCurrentDomainBaseDirectory;//获取文件路径

docLoad(path + "\\dbGuestxml");

XmlNode node = docSelectSingleNode("dbGuest");

XmlNodeList list = nodeChildNodes;

foreach (XmlNode xn in list)

{

XmlElement xe = (XmlElement)xn;

XmlNodeList xnf1 = xeChildNodes;

foreach (XmlNode xn2 in xnf1)

{

if (xeGetAttribute("days") == valueToString())//读取属性

{

if (xn2Name == "body")//获得内容

{

xn2InnerText = txtbodyText;

}

else if (xn2Name == "bl")

{

xn2InnerText = txtwcdText;

}

if (xn2Name == "title")

{

xn2InnerText = lblmesText;

}

xeSetAttribute("date",DateTimeNowToString("yyyy-MM"));

}

}

}

docSave(path + "\\dbGuestxml");

lblshowmesText = "提示：任务已成功提交!";

}

catch (Exception ex)

{

}

}

根据你的情况去修改下代码吧，这是我之前用的，可对节点进行修改。

应该可以设置id，根据id获取值

不好意思啦！借用zhangmiger代码一下。

XmlDocument doc = new XmlDocument();

docLoad("//XMLFile1xml");

XmlNodeList nodes = docSelectNodes("/Dimap_Document/IMAGING_DATE/vertex");

foreach (XmlNode node in nodes)

{

if(nodeAttributes["id"]value=="v2"){

ConsoleWriteLine(nodeInnerText);

}

}

ConsoleRead();

XMLFile1xml文件的内容：

<xml version="10" encoding="utf-8" >

<Dimap_Document>

<IMAGING_DATE>

<vertex id="v1">

a

</vertex>

<vertex id="v2">

b

</vertex>

<vertex id="v3">

c

</vertex>

</IMAGING_DATE>

</Dimap_Document>

string ids = stringEmpty;

XmlDocument _document = new XmlDocument();

_documentLoad(ServerMapPath("~/XML文件名xml"));

XmlNode _xmlNode = _documentSelectSingleNode("slider");

XmlNode xmlNode = _xmlNodeSelectSingleNode(stringFormat("item[@name=\"{0}\"]", 条件变量名称));

if (xmlNode != null)

{

XmlNodeList xmlNodeList = xmlNodeSelectNodes("join");

foreach (XmlNode item in xmlNodeList)

{

href = GetNodeAttributeValue(item, "href");

//以下节点类似

}

}

private string GetNodeAttributeValue(XmlNode item, string attributeName)

{

if (item == null || itemAttributes[attributeName] == null || stringIsNullOrEmpty(itemAttributes[attributeName]Value))

return stringEmpty;

return itemAttributes[attributeName]Value;

}

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