XmlHelper 通用类
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/// <summary>
/// 提供对XML数据的读写
/// </summary>
public sealed class XmlHelper
{
/// <summary>
/// 声明一个XmlDocument空对象
/// </summary>
private XmlDocument _xmlDoc = new XmlDocument();
/// <summary>
/// 构造函数，导入Xml文件
/// </summary>
/// <param name="xmlFile">文件绝对路径</param>
public XmlHelper(string xmlFile)
{
try
{
_xmlDoc.Load(xmlFile);
}
catch (Exception ex)
{
throw ex;
}
}
~XmlHelper()
{
_xmlDoc = null; // 释放XmlDocument对象
}
/// <summary>
/// 保存文件
/// </summary>
/// <param name="filePath">文件绝对路径</param>
public void Save(string filePath)
{
try
{
_xmlDoc.Save(filePath);
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 根据Xml文件的节点路径，返回一个DataSet数据集
/// </summary>
/// <param name="xmlPathNode">Xml文件的某个节点</param>
/// <returns></returns>
public DataSet GetDataSet(string xmlPathNode)
{
DataSet ds = new DataSet();
try
{
System.IO.StringReader read = new System.IO.StringReader(_xmlDoc.SelectSingleNode(xmlPathNode).OuterXml);
ds.ReadXml(read);
read.Close();
}
catch (Exception ex)
{
string err = ex.Message;
}
return ds;
}
/// <summary>
/// 属性查询，返回属性值
/// </summary>
/// <param name="xmlPathNode">属性所在的节点</param>
/// <param name="attributeName">属性名</param>
/// <returns></returns>
public string GetAttributeValue(string xmlPathNode, string attributeName)
{
string rlt = string.Empty;
try
{
rlt = _xmlDoc.SelectSingleNode(xmlPathNode).Attributes[attributeName].Value;
}
catch (Exception ex)
{
string err = ex.Message;
}
return rlt;
}
/// <summary>
/// 节点查询，返回节点值
/// </summary>
/// <param name="xmlPathNode">节点的路径</param>
/// <returns></returns>
public string GetNodeText(string xmlPathNode)
{
string txt = _xmlDoc.SelectSingleNode(xmlPathNode).InnerText;
if (null == txt || string.Empty == txt)
{
return string.Empty;
}
return txt;
}
/// <summary>
/// 节点值查询判断
/// </summary>
/// <param name="xmlPathNode">父节点</param>
/// <param name="index">节点索引</param>
/// <param name="nodeText">节点值</param>
/// <returns></returns>
public bool IsValidNode(string xmlPathNode, int index, string nodeText)
{
try
{
XmlNodeList nodeList = _xmlDoc.SelectNodes(xmlPathNode);
// 循环遍历节点，查询是否存在该节点
for (int i = 0; i < nodeList.Count; i++)
{
if (nodeText == nodeList[i].ChildNodes[index].InnerText)
{
return true;
}
}
}
catch (Exception ex)
{
string err = ex.Message;
}
return false;
}
/// <summary>
/// 获取子节点个数
/// </summary>
/// <param name="xmlPathNode">父节点</param>
/// <returns></returns>
public int NodeCount(string xmlPathNode)
{
int rlt = 0;
try
{
rlt = _xmlDoc.SelectSingleNode(xmlPathNode).ChildNodes.Count;
}
catch (Exception ex)
{
string err = ex.Message;
rlt = 0;
}
return rlt;
}
/// <summary>
/// 更新一个节点的内容
/// </summary>
/// <param name="xmlPathNode">节点的路径</param>
/// <param name="nodeContent">新的节点值</param>
/// <returns></returns>
public bool UpdateNode(string xmlPathNode, string nodeContent)
{
try
{
_xmlDoc.SelectSingleNode(xmlPathNode).InnerText = nodeContent;
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
/// <summary>
/// 更新N个节点值
/// </summary>
/// <param name="xmlParentNode">父节点</param>
/// <param name="xmlNodes">子节点</param>
/// <param name="nodeContents">子节点内容</param>
/// <returns></returns>
public bool UpdateNode(string xmlParentNode, string[] xmlNodes, string[] nodeContents)
{
try
{
// 根据节点数组循环修改节点值
for (int i = 0; i < xmlNodes.Length; i++)
{
_xmlDoc.SelectSingleNode(xmlParentNode + "/" + xmlNodes[i]).InnerText = nodeContents[i];
}
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
/// <summary>
/// 修改属性
/// </summary>
/// <param name="xmlPathNode">属性所在的节点</param>
/// <param name="attributeName">属性名</param>
/// <param name="attributeValue">属性值</param>
/// <returns></returns>
public bool UpdateAttributeValue(string xmlPathNode, string attributeName, string attributeValue)
{
try
{
_xmlDoc.SelectSingleNode(xmlPathNode).Attributes[attributeName].Value = attributeValue;
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
/// <summary>
/// 添加属性
/// </summary>
/// <param name="xmlPathNode">属性所在的节点</param>
/// <param name="attributeName">属性名</param>
/// <param name="attributeValue">属性值</param>
/// <returns></returns>
public bool InsertAttribute(string xmlPathNode, string attributeName, string attributeValue)
{
try
{
XmlElement element = (XmlElement)_xmlDoc.SelectSingleNode(xmlPathNode);
element.SetAttribute(attributeName, attributeValue);
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
/// <summary>
/// 插入一个节点，带N个子节点
/// </summary>
/// <param name="xmlPathNode">当前节点</param>
/// <param name="nodeName">插入节点的名称</param>
/// <param name="elementNames">子节点的名称数组</param>
/// <param name="contents">子节点的内容数组</param>
/// <returns></returns>
public bool InsertNode(string xmlPathNode, string nodeName, string[] elementNames, string[] contents)
{
try
{
XmlNode node = _xmlDoc.SelectSingleNode(xmlPathNode);
XmlElement childNode = _xmlDoc.CreateElement(nodeName);
node.AppendChild(childNode);
for (int i = 0; i < elementNames.Length; i++)
{
XmlElement element = _xmlDoc.CreateElement(elementNames[i]);
element.InnerText = contents[i];
childNode.AppendChild(element);
}
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
/// <summary>
/// 删除一个节点
/// </summary>
/// <param name="xmlPathNode">节点的路径</param>
/// <returns></returns>
public bool DeleteNode(string xmlPathNode)
{
try
{
_xmlDoc.SelectSingleNode(xmlPathNode).ParentNode.RemoveChild(_xmlDoc.SelectSingleNode(xmlPathNode));
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
/// <summary>
/// 将对象序列化成XML
/// </summary>
/// <param name="obj"></param>
/// <param name="hasNamespace">是否有Xml头部</param>
/// <returns></returns>
public static string Serialize(object obj, bool hasNamespace = false)
{
string xml = string.Empty;
try
{
var sb = new StringBuilder();
var xmlSettings = new XmlWriterSettings();
xmlSettings.OmitXmlDeclaration = hasNamespace;
// 换行缩进
xmlSettings.Indent = true;
xmlSettings.Encoding = System.Text.Encoding.Default;
using (var xmlWriter = XmlWriter.Create(sb, xmlSettings))
{
var xmlSerializer = new XmlSerializer(obj.GetType());
// 去除默认命名空间xmlns:xsd和xmlns:xsi
var xmlNampespace = new XmlSerializerNamespaces();
xmlNampespace.Add("", "");
if (hasNamespace)
{
xmlSerializer.Serialize(xmlWriter, obj);
}
else
{
xmlSerializer.Serialize(xmlWriter, obj, xmlNampespace);
}
xml = sb.ToString();
}
}
catch (Exception ex)
{
throw ex;
}
return xml;
}
/// <summary>
/// 反序列化
/// </summary>
/// <typeparam name="T">类型</typeparam>
/// <param name="xmlStr">xml字符串</param>
/// <returns>反序列化模型</returns>
public static T DeSerialize<T>(string xmlStr)
{
return (T)Deserialize(typeof(T), xmlStr);
}
private static object Deserialize(Type type, string xmlStr)
{
try
{
using (var sr = new StringReader(xmlStr))
{
var serializer = new XmlSerializer(type);
return serializer.Deserialize(sr);
}
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 将XML文本写入指定文件
/// </summary>
/// <param name="filePath">绝对路径</param>
/// <param name="xmlStr">XML文本</param>
/// <returns></returns>
public static bool WriteXmlString(string filePath, string xmlStr)
{
try
{
File.WriteAllText(filePath, xmlStr);
return true;
}
catch (Exception ex)
{
string err = ex.Message;
return false;
}
}
/// <summary>
/// 读取XML文本
/// </summary>
/// <param name="filePath">绝对路径</param>
/// <returns></returns>
public static string ReadXmlString(string filePath)
{
try
{
return File.ReadAllText(filePath, Encoding.Default);
}
catch (Exception ex)
{
string err = ex.Message;
return string.Empty;
}
}
}Demo
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