C#实现的XML操作类 C#实现的XML操作类实例

时间:2021-03-21 软件工程师人气:0

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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。

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