C#：XML操作類

悟靜 2012-05-04

展開全文

寫的一個XML操作類，包括讀取/插入/修改/刪除。

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 的摘要說明
    /// </summary>
    public class XmlHelper
    {
        public XmlHelper()
        {
        }

        /// <summary>
        /// 讀取數(shù)據(jù)
        /// </summary>
        /// <param name="path">路徑</param>
        /// <param name="node">節(jié)點</param>
        /// <param name="attribute">屬性名，非空時返回該屬性值，否則返回串聯(lián)值</param>
        /// <returns>string</returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Read(path, "/Node", "")
         * XmlHelper.Read(path, "/Node/Element[@Attribute='Name']", "Attribute")
         ************************************************/
        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>
        /// 插入數(shù)據(jù)
        /// </summary>
        /// <param name="path">路徑</param>
        /// <param name="node">節(jié)點</param>
        /// <param name="element">元素名，非空時插入新元素，否則在該元素中插入屬性</param>
        /// <param name="attribute">屬性名，非空時插入該元素屬性值，否則插入元素值</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Insert(path, "/Node", "Element", "", "Value")
         * XmlHelper.Insert(path, "/Node", "Element", "Attribute", "Value")
         * XmlHelper.Insert(path, "/Node", "", "Attribute", "Value")
         ************************************************/
        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(element);
                    if (attribute.Equals(""))
                        xe.InnerText = value;
                    else
                        xe.SetAttribute(attribute, value);
                    xn.AppendChild(xe);
                }
                doc.Save(path);
            }
            catch { }
        }

        /// <summary>
        /// 修改數(shù)據(jù)
        /// </summary>
        /// <param name="path">路徑</param>
        /// <param name="node">節(jié)點</param>
        /// <param name="attribute">屬性名，非空時修改該節(jié)點屬性值，否則修改節(jié)點值</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Insert(path, "/Node", "", "Value")
         * XmlHelper.Insert(path, "/Node", "Attribute", "Value")
         ************************************************/
        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>
        /// 刪除數(shù)據(jù)
        /// </summary>
        /// <param name="path">路徑</param>
        /// <param name="node">節(jié)點</param>
        /// <param name="attribute">屬性名，非空時刪除該節(jié)點屬性值，否則刪除節(jié)點值</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        /**************************************************
         * 使用示列:
         * XmlHelper.Delete(path, "/Node", "")
         * XmlHelper.Delete(path, "/Node", "Attribute")
         ************************************************/
        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/屬性
//XmlHelper.Insert(xml, "/Root/Studio", "Site", "Name", "小路工作室");
//XmlHelper.Insert(xml, "/Root/Studio", "Site", "Name", "丁香魚工作室");
//XmlHelper.Insert(xml, "/Root/Studio", "Site", "Name", "譜天城工作室");
//XmlHelper.Insert(xml, "/Root/Studio/Site[@Name='譜天城工作室']", "Master", "", "紅塵靜思");
//插入屬性
//XmlHelper.Insert(xml, "/Root/Studio/Site[@Name='小路工作室']", "", "Url", "http://www./");
//XmlHelper.Insert(xml, "/Root/Studio/Site[@Name='丁香魚工作室']", "", "Url", "http://www./");
//XmlHelper.Insert(xml, "/Root/Studio/Site[@Name='譜天城工作室']", "", "Url", "http://www./");
//修改元素值
//XmlHelper.Update(xml, "/Root/Studio/Site[@Name='譜天城工作室']/Master", "", "RedDust");
//修改屬性值
//XmlHelper.Update(xml, "/Root/Studio/Site[@Name='譜天城工作室']", "Url", "http://www./");
//XmlHelper.Update(xml, "/Root/Studio/Site[@Name='譜天城工作室']", "Name", "PuTianCheng Studio");
//讀取元素值
//Response.Write("<div>" + XmlHelper.Read(xml, "/Root/Studio/Site/Master", "") + "</div>");
//讀取屬性值
//Response.Write("<div>" + XmlHelper.Read(xml, "/Root/Studio/Site", "Url") + "</div>");
//讀取特定屬性值
//Response.Write("<div>" + XmlHelper.Read(xml, "/Root/Studio/Site[@Name='丁香魚工作室']", "Url") + "</div>");
//刪除屬性
//XmlHelper.Delete(xml, "/Root/Studio/Site[@Name='小路工作室']", "Url");
//刪除元素
//XmlHelper.Delete(xml, "/Root/Studio", "");