/// <summary>
/// 必需用XPATH表达式来获取相应节点
/// 关于xpath可以参见:
/// </summary>
public class XmlHelper
{
#region 变量
/// <summary>
/// xml文件所在路径类型
/// </summary>
/// <remarks>xml文件所在路径类型</remarks>
public enum enumXmlPathType
{
/// <summary>
/// 绝对路径
/// </summary>
AbsolutePath,
/// <summary>
/// 虚拟路径
/// </summary>
VirtualPath
}
private string xmlFilePath;
private enumXmlPathType xmlFilePathType;
private XmlDocument xmlDoc = new XmlDocument();
#endregion
#region 属性
/// <summary>
/// 文件路径
/// </summary>
/// <remarks>文件路径</remarks>
public string XmlFilePath
{
get
{
return this.xmlFilePath;
}
set
{
xmlFilePath = value;
}
}
/// <summary>
/// 文件路径类型
/// </summary>
public enumXmlPathType XmlFilePathTyp
{
set
{
xmlFilePathType = value;
}
}
#endregion
#region 构造函数
/// <summary>
///
/// </summary>
/// <param name="tempXmlFilePath"></param>
public XmlHelper(string tempXmlFilePath)
{
//
// TODO: 在此处添加构造函数逻辑
//
this.xmlFilePathType = enumXmlPathType.VirtualPath;
this.xmlFilePath = tempXmlFilePath;
GetXmlDocument();
//xmlDoc.Load( xmlFilePath ) ;
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="tempXmlFilePath">文件路径</param>
/// <param name="tempXmlFilePathType">类型</param>
public XmlHelper(string tempXmlFilePath, enumXmlPathType tempXmlFilePathType)
{
//
// TODO: 在此处添加构造函数逻辑
//
this.xmlFilePathType = tempXmlFilePathType;
this.xmlFilePath = tempXmlFilePath;
GetXmlDocument();
}
#endregion
////<summary>
///获取XmlDocument实体类
///</summary>
/// <returns>指定的XML描述文件的一个xmldocument实例</returns>
private XmlDocument GetXmlDocument()
{
XmlDocument doc = null;
if (this.xmlFilePathType == enumXmlPathType.AbsolutePath)
{
doc = GetXmlDocumentFromFile(xmlFilePath);
}
else if (this.xmlFilePathType == enumXmlPathType.VirtualPath)
{
doc = GetXmlDocumentFromFile(HttpContext.Current.Server.MapPath(xmlFilePath));
}
return doc;
}
private XmlDocument GetXmlDocumentFromFile(string tempXmlFilePath)
{
string xmlFileFullPath = tempXmlFilePath;
xmlDoc.Load(xmlFileFullPath);
//定义事件处理
xmlDoc.NodeChanged += new XmlNodeChangedEventHandler(this.nodeUpdateEvent);
xmlDoc.NodeInserted += new XmlNodeChangedEventHandler(this.nodeInsertEvent);
xmlDoc.NodeRemoved += new XmlNodeChangedEventHandler(this.nodeDeleteEvent);
return xmlDoc;
}
#region 读取指定节点的指定属性值
/// <summary>
/// 功能:
/// 读取指定节点的指定属性值
/// </summary>
/// <param name="strNode">节点名称</param>
/// <param name="strAttribute">此节点的属性</param>
/// <returns></returns>
public string GetXmlNodeAttributeValue(string strNode, string strAttribute)
{
string strReturn = "";
try
{
//根据指定路径获取节点
XmlNode xmlNode = xmlDoc.SelectSingleNode(strNode);
if (!(xmlNode == null))
{//获取节点的属性，并循环取出需要的属性值
XmlAttributeCollection xmlAttr = xmlNode.Attributes;
for (int i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name == strAttribute)
{
strReturn = xmlAttr.Item(i).Value;
break;
}
}
}
}
catch (XmlException xmle)
{
throw xmle;
}
return strReturn;
}
#endregion
#region 读取指定节点的值
/// <summary>
/// 功能:
/// 读取指定节点的值
/// </summary>
/// <param name="strNode">节点名称</param>
/// <returns></returns>
public string GetXmlNodeValue(string strNode)
{
string strReturn = String.Empty;
try
{
//根据路径获取节点
XmlNode xmlNode = xmlDoc.SelectSingleNode(strNode);
if (!(xmlNode == null))
strReturn = xmlNode.InnerText;
}
catch (XmlException xmle)
{
throw xmle;
}
return strReturn;
}
#endregion
#region 设置节点值
/// <summary>
/// 功能:
/// 设置节点值
/// </summary>
/// <param name="strNode">节点的名称</param>
/// <param name="newValue">节点值</param>
public void SetXmlNodeValue(string xmlNodePath, string xmlNodeValue)
{
try
{
//可以批量为符合条件的节点进行付值
XmlNodeList xmlNode = this.xmlDoc.SelectNodes(xmlNodePath);
if (!(xmlNode == null))
{
foreach (XmlNode xn in xmlNode)
{
xn.InnerText = xmlNodeValue;
}
}
/* 根据指定路径获取节点
XmlNode xmlNode = xmlDoc.SelectSingleNode(xmlNodePath) ;
//设置节点值
if (!(xmlNode==null))
xmlNode.InnerText = xmlNodeValue ;*/
}
catch (XmlException xmle)
{
throw xmle;
}
}
#endregion
#region 设置节点的属性值
/// <summary>
/// 功能:
/// 设置节点的属性值
/// </summary>
/// <param name="xmlNodePath">节点名称</param>
/// <param name="xmlNodeAttribute">属性名称</param>
/// <param name="xmlNodeAttributeValue">属性值</param>
public void SetXmlNodeAttributeValue(string xmlNodePath, string xmlNodeAttribute, string xmlNodeAttributeValue)
{
try
{
//可以批量为符合条件的节点的属性付值
XmlNodeList xmlNode = this.xmlDoc.SelectNodes(xmlNodePath);
if (!(xmlNode == null))
{
foreach (XmlNode xn in xmlNode)
{
XmlAttributeCollection xmlAttr = xn.Attributes;
for (int i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name == xmlNodeAttribute)
{
xmlAttr.Item(i).Value = xmlNodeAttributeValue;
break;
}
}
}
}
/*单个节点
//根据指定路径获取节点
XmlNode xmlNode = xmlDoc.SelectSingleNode(xmlNodePath) ;
if (!(xmlNode==null))
{//获取节点的属性，并循环取出需要的属性值
XmlAttributeCollection xmlAttr = xmlNode.Attributes ;
for(int i= ; i<xmlAttr.Count ; i++)
{
if ( xmlAttr.Item(i).Name == xmlNodeAttribute )
{
xmlAttr.Item(i).Value = xmlNodeAttributeValue;
break ;
}
}
}
*/
}
catch (XmlException xmle)
{
throw xmle;
}
}
#endregion
#region 添加
/// <summary>
/// 获取XML文件的根元素
/// </summary>
public XmlNode GetXmlRoot()
{
return xmlDoc.DocumentElement;
}
/// <summary>
/// 在根节点下添加父节点
/// </summary>
public void AddParentNode(string parentNode)
{
try
{
XmlNode root = GetXmlRoot();
XmlNode parentXmlNode = xmlDoc.CreateElement(parentNode);
root.AppendChild(parentXmlNode);
}
catch (XmlException xmle)
{
throw xmle;
}
}
/// <summary>
/// 向一个已经存在的父节点中插入一个子节点
/// </summary>
/// <param name="parentNodePath">父节点</param>
/// <param name="childNodePath">字节点名称</param>
public void AddChildNode(string parentNodePath, string childnodename)
{
try
{
XmlNode parentXmlNode = xmlDoc.SelectSingleNode(parentNodePath);
if (!((parentXmlNode) == null))//如果此节点存在
{
XmlNode childXmlNode = xmlDoc.CreateElement(childnodename);
parentXmlNode.AppendChild(childXmlNode);
}
else
{//如果不存在就放父节点添加
//this.GetXmlRoot().AppendChild(childXmlNode);
}
}
catch (XmlException xmle)
{
throw xmle;
}
}
/// <summary>
/// 向一个节点添加属性
/// </summary>
/// <param name="NodePath">节点路径</param>
/// <param name="NodeAttribute">属性名</param>
public void AddAttribute(string NodePath, string NodeAttribute)
{
privateAddAttribute(NodePath, NodeAttribute, "");
}
/// <summary>
///
/// </summary>
/// <param name="NodePath"></param>
/// <param name="NodeAttribute"></param>
/// <param name="NodeAttributeValue"></param>
private void privateAddAttribute(string NodePath, string NodeAttribute, string NodeAttributeValue)
{
try
{
XmlNode nodePath = xmlDoc.SelectSingleNode(NodePath);
if (!(nodePath == null))
{
XmlAttribute nodeAttribute = this.xmlDoc.CreateAttribute(NodeAttribute);
nodeAttribute.Value = NodeAttributeValue;
nodePath.Attributes.Append(nodeAttribute);
}
}
catch (XmlException xmle)
{
throw xmle;
}
}
/// <summary>
/// 向一个节点添加属性,并付值
/// </summary>
/// <param name="NodePath">节点</param>
/// <param name="NodeAttribute">属性名</param>
/// <param name="NodeAttributeValue">属性值</param>
public void AddAttribute(string NodePath, string NodeAttribute, string NodeAttributeValue)
{
privateAddAttribute(NodePath, NodeAttribute, NodeAttributeValue);
}
#endregion
#region 删除
/// <summary>
/// 删除节点的一个属性
/// </summary>
/// <param name="NodePath">节点所在的xpath表达式</param>
/// <param name="NodeAttribute">属性名</param>
public void DeleteAttribute(string NodePath, string NodeAttribute)
{
XmlNodeList nodePath = this.xmlDoc.SelectNodes(NodePath);
if (!(nodePath == null))
{
foreach (XmlNode tempxn in nodePath)
{
XmlAttributeCollection xmlAttr = tempxn.Attributes;
for (int i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name == NodeAttribute)
{
tempxn.Attributes.RemoveAt(i);
break;
}
}
}
}
}
/// <summary>
/// 删除节点,当其属性值等于给定的值时
/// </summary>
/// <param name="NodePath">节点所在的xpath表达式</param>
/// <param name="NodeAttribute">属性</param>
/// <param name="NodeAttributeValue">值</param>
public void DeleteAttribute(string NodePath, string NodeAttribute, string NodeAttributeValue)
{
XmlNodeList nodePath = this.xmlDoc.SelectNodes(NodePath);
if (!(nodePath == null))
{
foreach (XmlNode tempxn in nodePath)
{
XmlAttributeCollection xmlAttr = tempxn.Attributes;
for (int i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name == NodeAttribute && xmlAttr.Item(i).Value == NodeAttributeValue)
{
tempxn.Attributes.RemoveAt(i);
break;
}
}
}
}
}
/// <summary>
/// 删除节点
/// </summary>
/// <param name="tempXmlNode"></param>
/// <remarks></remarks>
public void DeleteXmlNode(string tempXmlNode)
{
XmlNodeList nodePath = this.xmlDoc.SelectNodes(tempXmlNode);
if (!(nodePath == null))
{
foreach (XmlNode xn in nodePath)
{
xn.ParentNode.RemoveChild(xn);
}
}
}
#endregion
#region XML文档事件
/// <summary>
///
/// </summary>
/// <param name="src"></param>
/// <param name="args"></param>
private void nodeInsertEvent(Object src, XmlNodeChangedEventArgs args)
{
//保存设置
SaveXmlDocument();
}
/// <summary>
///
/// </summary>
/// <param name="src"></param>
/// <param name="args"></param>
private void nodeDeleteEvent(Object src, XmlNodeChangedEventArgs args)
{
//保存设置
SaveXmlDocument();
}
/// <summary>
///
/// </summary>
/// <param name="src"></param>
/// <param name="args"></param>
private void nodeUpdateEvent(Object src, XmlNodeChangedEventArgs args)
{
//保存设置
SaveXmlDocument();
}
#endregion
#region 保存XML文件
/// <summary>
/// 功能:
/// 保存XML文件
///
/// </summary>
public void SaveXmlDocument()
{
try
{
//保存设置的结果
if (this.xmlFilePathType == enumXmlPathType.AbsolutePath)
{
Savexml(xmlFilePath);
}
else if (this.xmlFilePathType == enumXmlPathType.VirtualPath)
{
Savexml(HttpContext.Current.Server.MapPath(xmlFilePath));
}
}
catch (XmlException xmle)
{
throw xmle;
}
}
/// <summary>
/// 功能:
/// 保存XML文件
/// </summary>
public void SaveXmlDocument(string tempXMLFilePath)
{
try
{
//保存设置的结果
Savexml(tempXMLFilePath);
}
catch (XmlException xmle)
{
throw xmle;
}
}
/// <summary>
///
/// </summary>
/// <param name="filepath"></param>
private void Savexml(string filepath)
{
xmlDoc.Save(filepath);
}
#endregion
}
