C#操作XML通用辦法匯總。本站提示廣大學習愛好者：（C#操作XML通用辦法匯總）文章只能為提供參考，不一定能成為您想要的結果。以下是C#操作XML通用辦法匯總正文
在.net的項目開辟中，常常會對XML文件停止操作，因為XML文件可以完成跨平台傳輸，較多的運用在數據傳輸中，特總結以下幾種經常使用的XML操作辦法：
1.創立XML文檔：
/// <summary>
/// 創立XML文檔
/// </summary>
/// <param name="name">根節點稱號</param>
/// <param name="type">根節點的一個屬性值</param>
/// <returns>XmlDocument對象</returns>
public static XmlDocument CreateXmlDocument(string name, string type)
{
XmlDocument doc;
try
{
doc = new XmlDocument();
doc.LoadXml("<" + name + "/>");
var rootEle = doc.DocumentElement;
rootEle?.SetAttribute("type", type);
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
return doc;
}
2.讀取XML文檔中的數據：
/// <summary>
/// 讀取數據
/// </summary>
/// <param name="path">途徑</param>
/// <param name="node">節點</param>
/// <param name="attribute">屬性名，非空時前往該屬性值，不然前往串連值</param>
/// <returns>string</returns>
public static string Read(string path, string node, string attribute)
{
var value = "";
try
{
var doc = new XmlDocument();
doc.Load(path);
var xn = doc.SelectSingleNode(node);
if (xn != null && xn.Attributes != null)
value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
return value;
}
3.對XML文檔拔出數據：
/// <summary>
/// 拔出數據
/// </summary>
/// <param name="path">途徑</param>
/// <param name="node">節點</param>
/// <param name="element">元素名，非空時拔出新元素，不然在該元素中拔出屬性</param>
/// <param name="attribute">屬性名，非空時拔出該元素屬性值，不然拔出元素值</param>
/// <param name="value">值</param>
/// <returns></returns>
public static void Insert(string path, string node, string element, string attribute, string value)
{
try
{
var doc = new XmlDocument();
doc.Load(path);
var xn = doc.SelectSingleNode(node);
if (element.Equals(""))
{
if (!attribute.Equals(""))
{
var xe = (XmlElement)xn;
xe?.SetAttribute(attribute, value);
//xe?.SetAttribute(attribute, value);
}
}
else
{
var xe = doc.CreateElement(element);
if (attribute.Equals(""))
xe.InnerText = value;
else
xe.SetAttribute(attribute, value);
xn?.AppendChild(xe);
}
doc.Save(path);
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
}
4.修正XML文檔中的數據：
/// <summary>
/// 修正數據
/// </summary>
/// <param name="path">途徑</param>
/// <param name="node">節點</param>
/// <param name="attribute">屬性名，非空時修正該節點屬性值，不然修正節點值</param>
/// <param name="value">值</param>
/// <returns></returns>
public static void Update(string path, string node, string attribute, string value)
{
try
{
var doc = new XmlDocument();
doc.Load(path);
var xn = doc.SelectSingleNode(node);
var xe = (XmlElement)xn;
if (attribute.Equals(""))
{
if (xe != null) xe.InnerText = value;
}
else
{
xe?.SetAttribute(attribute, value);
}
doc.Save(path);
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
}
5.刪除XML文檔中數據：
/// <summary>
/// 刪除數據
/// </summary>
/// <param name="path">途徑</param>
/// <param name="node">節點</param>
/// <param name="attribute">屬性名，非空時刪除該節點屬性值，不然刪除節點值</param>
/// <returns></returns>
public static void Delete(string path, string node, string attribute)
{
try
{
var doc = new XmlDocument();
doc.Load(path);
var xn = doc.SelectSingleNode(node);
var xe = (XmlElement)xn;
if (attribute.Equals(""))
{
xn?.ParentNode?.RemoveChild(xn);
}
else
{
xe?.RemoveAttribute(attribute);
}
doc.Save(path);
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
}
6.讀取XML文檔中指定節點數據：
/// <summary>
/// 取得xml文件中指定節點的節點數據
/// </summary>
/// <param name="path"></param>
/// <param name="nodeName"></param>
/// <returns></returns>
public static string GetNodeInfoByNodeName(string path, string nodeName)
{
var xmlString = string.Empty;
try
{
var xml = new XmlDocument();
xml.Load(path);
var root = xml.DocumentElement;
if (root == null) return xmlString;
var node = root.SelectSingleNode("//" + nodeName);
if (node != null)
{
xmlString = node.InnerText;
}
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
return xmlString;
}
7.獲得XML指定節點的屬性：
/// <summary>
/// 功效:讀取指定節點的指定屬性值
/// </summary>
/// <param name="path"></param>
/// <param name="strNode">節點稱號</param>
/// <param name="strAttribute">此節點的屬性</param>
/// <returns></returns>
public string GetXmlNodeAttributeValue(string path, string strNode, string strAttribute)
{
var strReturn = "";
try
{
var xml = new XmlDocument();
xml.Load(path);
//依據指定途徑獲得節點
var xmlNode = xml.SelectSingleNode(strNode);
if (xmlNode != null)
{
//獲得節點的屬性，並輪回掏出須要的屬性值
var xmlAttr = xmlNode.Attributes;
if (xmlAttr == null) return strReturn;
for (var i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name != strAttribute) continue;
strReturn = xmlAttr.Item(i).Value;
break;
}
}
}
catch (XmlException xmle)
{
throw new Exception(xmle.Message);
}
return strReturn;
}
8.設置XML文檔中指定節點的屬性：
/// <summary>
/// 功效:設置節點的屬性值
/// </summary>
/// <param name="path"></param>
/// <param name="xmlNodePath">節點稱號</param>
/// <param name="xmlNodeAttribute">屬性稱號</param>
/// <param name="xmlNodeAttributeValue">屬性值</param>
public void SetXmlNodeAttributeValue(string path, string xmlNodePath, string xmlNodeAttribute, string xmlNodeAttributeValue)
{
try
{
var xml = new XmlDocument();
xml.Load(path);
//可以批量為相符前提的節點的屬性付值
var xmlNode = xml.SelectNodes(xmlNodePath);
if (xmlNode == null) return;
foreach (var xmlAttr in from XmlNode xn in xmlNode select xn.Attributes)
{
if (xmlAttr == null) return;
for (var i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name != xmlNodeAttribute) continue;
xmlAttr.Item(i).Value = xmlNodeAttributeValue;
break;
}
}
}
catch (XmlException xmle)
{
throw new Exception(xmle.Message);
}
}
9.讀取XML文檔指定節點的值：
/// <summary>
/// 讀取XML資本中的指定節點內容
/// </summary>
/// <param name="source">XML資本</param>
/// <param name="xmlType">XML資本類型：文件，字符串</param>
/// <param name="nodeName">節點稱號</param>
/// <returns>節點內容</returns>
public static object GetNodeValue(string source, XmlType xmlType, string nodeName)
{
var xd = new XmlDocument();
if (xmlType == XmlType.File)
{
xd.Load(source);
}
else
{
xd.LoadXml(source);
}
var xe = xd.DocumentElement;
XmlNode xn = null;
if (xe != null)
{
xn= xe.SelectSingleNode("//" + nodeName);
}
return xn.InnerText;
}
10.更新XML文檔指定節點的內容：
/// <summary>
/// 更新XML文件中的指定節點內容
/// </summary>
/// <param name="filePath">文件途徑</param>
/// <param name="nodeName">節點稱號</param>
/// <param name="nodeValue">更新內容</param>
/// <returns>更新能否勝利</returns>
public static bool UpdateNode(string filePath, string nodeName, string nodeValue)
{
try
{
bool flag;
var xd = new XmlDocument();
xd.Load(filePath);
var xe = xd.DocumentElement;
if (xe == null) return false;
var xn = xe.SelectSingleNode("//" + nodeName);
if (xn != null)
{
xn.InnerText = nodeValue;
flag = true;
}
else
{
flag = false;
}
return flag;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
復制代碼
11.將對象轉化為XML文件，並存入指定目次：
復制代碼
/// <summary>
/// 將對象轉化為xml，並寫入指定途徑的xml文件中
/// </summary>
/// <typeparam name="T">C#對象名</typeparam>
/// <param name="item">對象實例</param>
/// <param name="path">途徑</param>
/// <param name="jjdbh">標號</param>
/// <param name="ends">停止符號（全部xml的途徑相似以下：C:\xmltest\201111send.xml，個中path=C:\xmltest,jjdbh=201111,ends=send）</param>
/// <returns></returns>
public static string WriteXml<T>(T item, string path, string jjdbh, string ends)
{
if (string.IsNullOrEmpty(ends))
{
//默許為發送
ends = "send";
}
//掌握寫入文件的次數
var i = 0;
//獲得以後對象的類型，也能夠應用反射typeof(對象名)
var serializer = new XmlSerializer(item.GetType());
//xml的途徑組合
object[] obj = { path, "\\", jjdbh, ends, ".xml" };
var xmlPath = string.Concat(obj);
while (true)
{
try
{
//用filestream方法創立文件不會湧現“文件正在占用中，用File.create”則不可
var fs = System.IO.File.Create(xmlPath);
fs.Close();
TextWriter writer = new StreamWriter(xmlPath, false, Encoding.UTF8);
var xml = new XmlSerializerNamespaces();
xml.Add(string.Empty, string.Empty);
serializer.Serialize(writer, item, xml);
writer.Flush();
writer.Close();
break;
}
catch (Exception)
{
if (i < 5)
{
i++;
continue;
}
break;
}
}
return SerializeToXmlStr<T>(item, true);
}
12.向一個曾經存在的父節點中拔出一個子節點：
/// <summary>
/// 向一個曾經存在的父節點中拔出一個子節點
/// </summary>
/// <param name="path"></param>
/// <param name="parentNodePath">父節點</param>
/// <param name="childnodename">子節點稱號</param>
public void AddChildNode(string path, string parentNodePath, string childnodename)
{
try
{
var xml = new XmlDocument();
xml.Load(path);
var parentXmlNode = xml.SelectSingleNode(parentNodePath);
XmlNode childXmlNode = xml.CreateElement(childnodename);
if ((parentXmlNode) != null)
{
//假如此節點存在
parentXmlNode.AppendChild(childXmlNode);
}
else
{
//假如不存在就放父節點添加
GetXmlRoot(path).AppendChild(childXmlNode);
}
}
catch (XmlException xmle)
{
throw new Exception(xmle.Message);
}
}
以上的辦法總結采取.net4.5版本和c#6.0語法，願望對年夜家的進修有所贊助，也願望年夜家多多支撐。
