常用的XML读写代码,Asp.Net代码库,德仔网

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【Asp.Net】常用的XML读写
作者:Dezai.CN / 发布于2013/7/30/ 698

	using System;
	using System.Data;
	using System.Configuration;
	using System.Web;
	using System.Web.Security;
	using System.Web.UI;
	using System.Web.UI.WebControls;
	using System.Web.UI.WebControls.WebParts;
	using System.Web.UI.HtmlControls;
	using System.Collections;

	//引用命名空间
	using System.Xml;
	
	namespace xmlOp
	{
	/// <summary>
	/// XmlOp类提供对XML数据库的读写
	/// </summary>
	 public class XmlOp
	 {
	 //声明一个XmlDocument空对象
	 protected XmlDocument XmlDoc = new XmlDocument();

	 /// <summary>
	 /// 构造函数，导入Xml文件
	 /// </summary>
	 /// <param name="xmlFile">文件虚拟路径</param>
	 public XmlOp(string xmlFile)
	 {
	 try
	 {
	 XmlDoc.Load(GetXmlFilePath(xmlFile)); //载入Xml文档
	 }
	 catch (System.Exception ex)
	 {
	 throw ex;
	 }
	 }
	 /// <summary>
	 /// 析构函数
	 /// </summary>
	 ~XmlOp()
	 {
	 XmlDoc = null; //释放XmlDocument对象
	 }

	 /// <summary>
	 /// 保存文件
	 /// </summary>
	 /// <param name="filePath">文件虚拟路径</param>
	 public void Save(string filePath)
	 {
	 try
	 {
	 XmlDoc.Save(GetXmlFilePath(filePath));
	 }
	 catch (System.Exception ex)
	 {
	 throw ex;
	 }
	 }

	 /// <summary>
	 /// 返回Xml文件实际路径
	 /// </summary>
	 /// <param name="xmlFile">文件虚拟路径</param>
	 /// <returns></returns>
	 public string GetXmlFilePath(string xmlFile)
	 {
	 return HttpContext.Current.Server.MapPath(xmlFile);
	 }

	 /// <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 GetDs(string XmlPathNode)
	 {
	 DataSet ds = new DataSet();
	 try
	 {
	 System.IO.StringReader read = new System.IO.StringReader(XmlDoc.SelectSingleNode(XmlPathNode).OuterXml);
	 ds.ReadXml(read); //利用DataSet的ReadXml方法读取StringReader文件流
	 read.Close();
	 }
	 catch
	 { }
	 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="Attrib">属性</param>
	 /// <returns></returns>
	 public string SelectAttrib(string XmlPathNode, string Attrib)
	 {
	 string _strNode="";
	 try
	 {
	 _strNode = XmlDoc.SelectSingleNode(XmlPathNode).Attributes[Attrib].Value;
	 }
	 catch
	 { }
	 return _strNode;
	 }

	 /// <summary>
	 /// 节点查询，返回节点值
	 /// </summary>
	 /// <param name="XmlPathNode">节点的路径</param>
	 /// <returns></returns>
	 public string SelectNodeText(string XmlPathNode)
	 {
	 string _nodeTxt = XmlDoc.SelectSingleNode(XmlPathNode).InnerText;
	 if (_nodeTxt == null || _nodeTxt == "")
	 return "";
	 else
	 return _nodeTxt;
	 }

	 /// <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 SelectNode(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 (_NodeList[i].ChildNodes[index].InnerText == NodeText)
	 {
	 return true;
	 break;
	 }
	 }
	 }
	 catch
	 {
	 }
	 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 i = 0;
	 try
	 {
	 i=XmlDoc.SelectSingleNode(XmlPathNode).ChildNodes.Count;
	 }
	 catch
	 {
	 i=0;
	 }
	 return i;
	 }

	 /// <summary>
	 /// 更新一个节点的内容
	 /// </summary>
	 /// <param name="XmlPathNode">节点的路径</param>
	 /// <param name="Content">新的节点值</param>
	 /// <returns></returns>
	 public bool UpdateNode(string XmlPathNode,string NodeContent)
	 {
	 try
	 {
	 XmlDoc.SelectSingleNode(XmlPathNode).InnerText = NodeContent;
	 return true;
	 }
	 catch
	 {
	 return false;
	 }
	 }

	 /// <summary>
	 /// 更新N个节点值
	 /// </summary>
	 /// <param name="XmlParentNode">父节点</param>
	 /// <param name="XmlNode">子节点</param>
	 /// <param name="NodeContent">子节点内容</param>
	 /// <returns></returns>
	 public bool UpdateNode(string XmlParentNode, string[] XmlNode, string[] NodeContent)
	 {
	 try
	 {
	 //根据节点数组循环修改节点值
	 for (int i = 0; i < XmlNode.Length; i++)
	 {
	 XmlDoc.SelectSingleNode(XmlParentNode+"/"+XmlNode[i]).InnerText = NodeContent[i];
	 }
	 return true;
	 }
	 catch
	 {
	 return false;
	 }
	 }

	 /// <summary>
	 /// 修改属性
	 /// </summary>
	 /// <param name="XmlPathNode">属性所在的节点</param>
	 /// <param name="Attrib">属性名</param>
	 /// <param name="Content">属性值</param>
	 /// <returns></returns>
	 public bool UpdateAttrib(string XmlPathNode, string Attrib,string AttribContent)
	 {
	 try
	 {
	 //修改属性值
	 XmlDoc.SelectSingleNode(XmlPathNode).Attributes[Attrib].Value = AttribContent;
	 return true;
	 }
	 catch
	 {
	 return false;
	 }
	 }

	 /// <summary>
	 /// 添加属性
	 /// </summary>
	 /// <param name="MainNode">属性所在节点</param>
	 /// <param name="Attrib">属性名</param>
	 /// <param name="AttribContent">属性值</param>
	 /// <returns></returns>
	 public bool InsertAttrib(string MainNode,string Attrib, string AttribContent)
	 {
	 try
	 {
	 XmlElement objNode = (XmlElement)XmlDoc.SelectSingleNode(MainNode); //强制转化成XmlElement对象
	 objNode.SetAttribute(Attrib, AttribContent); //XmlElement对象添加属性方法
	 return true;
	 }
	 catch
	 {
	 return false;
	 }
	 }

	 /// <summary>
	 /// 插入一个节点，带N个子节点
	 /// </summary>
	 /// <param name="MainNode">插入节点的父节点</param>
	 /// <param name="ChildNode">插入节点的元素名</param>
	 /// <param name="Element">插入节点的子节点名数组</param>
	 /// <param name="Content">插入节点的子节点内容数组</param>
	 /// <returns></returns>
	 public bool InsertNode(string MainNode, string ChildNode, string[] Element, string[] Content)
	 {
	 try
	 {
	 XmlNode objRootNode = XmlDoc.SelectSingleNode(MainNode); //声明XmlNode对象
	 XmlElement objChildNode = XmlDoc.CreateElement(ChildNode); //创建XmlElement对象
	 objRootNode.AppendChild(objChildNode);
	 for (int i = 0; i < Element.Length; i++) //循环插入节点元素
	 {
	 XmlElement objElement = XmlDoc.CreateElement(Element[i]);
	 objElement.InnerText = Content[i];
	 objChildNode.AppendChild(objElement);
	 }
	 return true;
	 }
	 catch
	 {
	 return false;
	 }
	 }

	 /// <summary>
	 /// 删除一个节点
	 /// </summary>
	 /// <param name="Node">要删除的节点</param>
	 /// <returns></returns>
	 public bool DeleteNode(string Node)
	 {
	 try
	 {
	 //XmlNode的RemoveChild方法来删除节点及其所有子节点
	 XmlDoc.SelectSingleNode(Node).ParentNode.RemoveChild(XmlDoc.SelectSingleNode(Node));
	 return true;
	 }
	 catch
	 {
	 return false;
	 }
	 }
	 }
	}
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