C#实现的XML操作类实例

本文实例讲述了c#实现的xml操作类。分享给大家供大家参考。具体如下：

这里讲述了c#写的一个xml操作类，包括读取/插入/修改/删除。

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.xml;
namespace putiancheng
{
 /// <summary>
 /// xmlhelper 的摘要说明
 /// </summary>
 public class xmlhelper
 {
  public xmlhelper()
  {
  }
  /// <summary>
  /// 读取数据
  /// </summary>
  /// <param name="path">路径</param>
  /// <param name="node">节点</param>
  /// <param name="attribute">属性名，非空时返回该属性值，否则返回串联值</param>
  /// <returns>string</returns>
  public static string read(string path, string node, string attribute)
  {
   string value = "";
   try
   {
    xmldocument doc = new xmldocument();
    doc.load(path);
    xmlnode xn = doc.selectsinglenode(node);
    value = (attribute.equals("") ? xn.innertext : xn.attributes[attribute].value);
   }
   catch { }
   return value;
  }
  /// <summary>
  /// 插入数据
  /// </summary>
  /// <param name="path">路径</param>
  /// <param name="node">节点</param>
  /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
  /// <param name="attribute">属性名，非空时插入该元素属性值，否则插入元素值</param>
  /// <param name="value">值</param>
  /// <returns></returns>
  public static void insert(string path, string node, string element, string attribute, string value)
  {
   try
   {
    xmldocument doc = new xmldocument();
    doc.load(path);
    xmlnode xn = doc.selectsinglenode(node);
    if (element.equals(""))
    {
     if (!attribute.equals(""))
     {
      xmlelement xe = (xmlelement)xn;
      xe.setattribute(attribute, value);
     }
    }
    else
    {
     xmlelement xe = doc.createelement_x(element);
     if (attribute.equals(""))
      xe.innertext = value;
     else
      xe.setattribute(attribute, value);
     xn.appendchild(xe);
    }
    doc.save(path);
   }
   catch { }
  }
  /// <summary>
  /// 修改数据
  /// </summary>
  /// <param name="path">路径</param>
  /// <param name="node">节点</param>
  /// <param name="attribute">属性名，非空时修改该节点属性值，否则修改节点值</param>
  /// <param name="value">值</param>
  /// <returns></returns>
  public static void update(string path, string node, string attribute, string value)
  {
   try
   {
    xmldocument doc = new xmldocument();
    doc.load(path);
    xmlnode xn = doc.selectsinglenode(node);
    xmlelement xe = (xmlelement)xn;
    if (attribute.equals(""))
     xe.innertext = value;
    else
     xe.setattribute(attribute, value);
    doc.save(path);
   }
   catch { }
  }
  /// <summary>
  /// 删除数据
  /// </summary>
  /// <param name="path">路径</param>
  /// <param name="node">节点</param>
  /// <param name="attribute">属性名，非空时删除该节点属性值，否则删除节点值</param>
  /// <param name="value">值</param>
  /// <returns></returns>
  public static void delete(string path, string node, string attribute)
  {
   try
   {
    xmldocument doc = new xmldocument();
    doc.load(path);
    xmlnode xn = doc.selectsinglenode(node);
    xmlelement xe = (xmlelement)xn;
    if (attribute.equals(""))
     xn.parentnode.removechild(xn);
    else
     xe.removeattribute(attribute);
    doc.save(path);
   }
   catch { }
  }
 }
}

xmlfile.xml：

<?xml version="1.0" encoding="utf-8"?>
<root />

使用方法：

string xml = server.mappath("xmlfile.xml");
//插入元素
xmlhelper.insert(xml, "/root", "studio", "", "");
//插入元素/属性
xmlhelper.insert(xml, "/root/studio", "site", "name", "小路工作室");
xmlhelper.insert(xml, "/root/studio", "site", "name", "丁香鱼工作室");
xmlhelper.insert(xml, "/root/studio", "site", "name", "谱天城工作室");
xmlhelper.insert(xml, "/root/studio/site[@name='谱天城工作室']", "master", "", "红尘静思");
//插入属性
xmlhelper.insert(xml, "/root/studio/site[@name='小路工作室']", "", "url", "http://www.wzlu.com/");
xmlhelper.insert(xml, "/root/studio/site[@name='丁香鱼工作室']", "", "url", "http://www.luckfish.net/");
xmlhelper.insert(xml, "/root/studio/site[@name='谱天城工作室']", "", "url", "http://www.putiancheng.com/");
//修改元素值
xmlhelper.update(xml, "/root/studio/site[@name='谱天城工作室']/master", "", "reddust");
//修改属性值
xmlhelper.update(xml, "/root/studio/site[@name='谱天城工作室']", "url", "http://www.putiancheng.net/");
xmlhelper.update(xml, "/root/studio/site[@name='谱天城工作室']", "name", "putiancheng studio");
//读取元素值
response.write("<div>" + xmlhelper.read(xml, "/root/studio/site/master", "") + "</div>");
//读取属性值
response.write("<div>" + xmlhelper.read(xml, "/root/studio/site", "url") + "</div>");
//读取特定属性值
response.write("<div>" + xmlhelper.read(xml, "/root/studio/site[@name='丁香鱼工作室']", "url") + "</div>");
//删除属性
xmlhelper.delete(xml, "/root/studio/site[@name='小路工作室']", "url");
//删除元素
xmlhelper.delete(xml, "/root/studio", "");

希望本文所述对大家的c#程序设计有所帮助。