XML操作的示例分析

小編給大家分享一下XML操作的示例分析，相信大部分人都還不怎么了解，因此分享這篇文章給大家參考一下，希望大家閱讀完這篇文章后大有收獲，下面讓我們一起去了解一下吧！

在開發(fā)過程中對XML的使用不是太多，要用到時(shí)候也是想辦法繞過去，最近一個(gè)同事給了一個(gè)詳細(xì)的操作。分享一下

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
 
using System.Xml;
 
namespace RenShiExport
{
 
 
    /// <summary>
    /// XMLHelper XML文檔操作管理器
    /// </summary>
    public class XMLHelper
    {
        public XMLHelper()
        {
            //
            // TODO: 在此處添加構(gòu)造函數(shù)邏輯
            //
        }
 
 
        #region XML文檔節(jié)點(diǎn)查詢和讀取
        /// <summary>
        /// 選擇匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)XmlNode.
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名")</param>
        /// <returns>返回XmlNode</returns>
        public static XmlNode GetXmlNodeByXpath(string xmlFileName, string xpath)
        {
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                return xmlNode;
            }
            catch (Exception ex)
            {
                return null;
                //throw ex; //這里可以定義你自己的異常處理
            }
        }
 
        /// <summary>
        /// 選擇匹配XPath表達(dá)式的節(jié)點(diǎn)列表XmlNodeList.
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名")</param>
        /// <returns>返回XmlNodeList</returns>
        public static XmlNodeList GetXmlNodeListByXpath(string xmlFileName, string xpath)
        {
            XmlDocument xmlDoc = new XmlDocument();
 
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNodeList xmlNodeList = xmlDoc.SelectNodes(xpath);
                return xmlNodeList;
            }
            catch (Exception ex)
            {
                return null;
                //throw ex; //這里可以定義你自己的異常處理
            }
        }
 
        /// <summary>
        /// 選擇匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)的匹配xmlAttributeName的屬性XmlAttribute.
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名</param>
        /// <param name="xmlAttributeName">要匹配xmlAttributeName的屬性名稱</param>
        /// <returns>返回xmlAttributeName</returns>
        public static XmlAttribute GetXmlAttribute(string xmlFileName, string xpath, string xmlAttributeName)
        {
            string content = string.Empty;
            XmlDocument xmlDoc = new XmlDocument();
            XmlAttribute xmlAttribute = null;
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    if (xmlNode.Attributes.Count > 0)
                    {
                        xmlAttribute = xmlNode.Attributes[xmlAttributeName];
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return xmlAttribute;
        }
        #endregion
 
        #region XML文檔創(chuàng)建和節(jié)點(diǎn)或?qū)傩缘奶砑印⑿薷?
        /// <summary>
        /// 創(chuàng)建一個(gè)XML文檔
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="rootNodeName">XML文檔根節(jié)點(diǎn)名稱(須指定一個(gè)根節(jié)點(diǎn)名稱)</param>
        /// <param name="version">XML文檔版本號(必須為:"1.0")</param>
        /// <param name="encoding">XML文檔編碼方式</param>
        /// <param name="standalone">該值必須是"yes"或"no",如果為null,Save方法不在XML聲明上寫出獨(dú)立屬性</param>
        /// <returns>成功返回true,失敗返回false</returns>
        public static bool CreateXmlDocument(string xmlFileName, string rootNodeName, string version, string encoding, string standalone)
        {
            bool isSuccess = false;
            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration(version, encoding, standalone);
                XmlNode root = xmlDoc.CreateElement(rootNodeName);
                xmlDoc.AppendChild(xmlDeclaration);
                xmlDoc.AppendChild(root);
                xmlDoc.Save(xmlFileName);
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 依據(jù)匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)來創(chuàng)建它的子節(jié)點(diǎn)(如果此節(jié)點(diǎn)已存在則追加一個(gè)新的同名節(jié)點(diǎn)
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名</param>
        /// <param name="xmlNodeName">要匹配xmlNodeName的節(jié)點(diǎn)名稱</param>
        /// <param name="innerText">節(jié)點(diǎn)文本值</param>
        /// <param name="xmlAttributeName">要匹配xmlAttributeName的屬性名稱</param>
        /// <param name="value">屬性值</param>
        /// <returns>成功返回true,失敗返回false</returns>
        public static bool CreateXmlNodeByXPath(string xmlFileName, string xpath, string xmlNodeName, string innerText, string xmlAttributeName, string value)
        {
            bool isSuccess = false;
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    //存不存在此節(jié)點(diǎn)都創(chuàng)建
                    XmlElement subElement = xmlDoc.CreateElement(xmlNodeName);
                    subElement.InnerXml = innerText;
 
                    //如果屬性和值參數(shù)都不為空則在此新節(jié)點(diǎn)上新增屬性
                    if (!string.IsNullOrEmpty(xmlAttributeName) && !string.IsNullOrEmpty(value))
                    {
                        XmlAttribute xmlAttribute = xmlDoc.CreateAttribute(xmlAttributeName);
                        xmlAttribute.Value = value;
                        subElement.Attributes.Append(xmlAttribute);
                    }
 
                    xmlNode.AppendChild(subElement);
                }
                xmlDoc.Save(xmlFileName); //保存到XML文檔
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 依據(jù)匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)來創(chuàng)建或更新它的子節(jié)點(diǎn)(如果節(jié)點(diǎn)存在則更新,不存在則創(chuàng)建)
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名</param>
        /// <param name="xmlNodeName">要匹配xmlNodeName的節(jié)點(diǎn)名稱</param>
        /// <param name="innerText">節(jié)點(diǎn)文本值</param>
        /// <returns>成功返回true,失敗返回false</returns>
        public static bool CreateOrUpdateXmlNodeByXPath(string xmlFileName, string xpath, string xmlNodeName, string innerText)
        {
            bool isSuccess = false;
            bool isExistsNode = false;//標(biāo)識節(jié)點(diǎn)是否存在
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    //遍歷xpath節(jié)點(diǎn)下的所有子節(jié)點(diǎn)
                    foreach (XmlNode node in xmlNode.ChildNodes)
                    {
                        if (node.Name.ToLower() == xmlNodeName.ToLower())
                        {
                            //存在此節(jié)點(diǎn)則更新
                            node.InnerXml = innerText;
                            isExistsNode = true;
                            break;
                        }
                    }
                    if (!isExistsNode)
                    {
                        //不存在此節(jié)點(diǎn)則創(chuàng)建
                        XmlElement subElement = xmlDoc.CreateElement(xmlNodeName);
                        subElement.InnerXml = innerText;
                        xmlNode.AppendChild(subElement);
                    }
                }
                xmlDoc.Save(xmlFileName); //保存到XML文檔
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 依據(jù)匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)來創(chuàng)建或更新它的屬性(如果屬性存在則更新,不存在則創(chuàng)建)
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名</param>
        /// <param name="xmlAttributeName">要匹配xmlAttributeName的屬性名稱</param>
        /// <param name="value">屬性值</param>
        /// <returns>成功返回true,失敗返回false</returns>
        public static bool CreateOrUpdateXmlAttributeByXPath(string xmlFileName, string xpath, string xmlAttributeName, string value)
        {
            bool isSuccess = false;
            bool isExistsAttribute = false;//標(biāo)識屬性是否存在
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    //遍歷xpath節(jié)點(diǎn)中的所有屬性
                    foreach (XmlAttribute attribute in xmlNode.Attributes)
                    {
                        if (attribute.Name.ToLower() == xmlAttributeName.ToLower())
                        {
                            //節(jié)點(diǎn)中存在此屬性則更新
                            attribute.Value = value;
                            isExistsAttribute = true;
                            break;
                        }
                    }
                    if (!isExistsAttribute)
                    {
                        //節(jié)點(diǎn)中不存在此屬性則創(chuàng)建
                        XmlAttribute xmlAttribute = xmlDoc.CreateAttribute(xmlAttributeName);
                        xmlAttribute.Value = value;
                        xmlNode.Attributes.Append(xmlAttribute);
                    }
                }
                xmlDoc.Save(xmlFileName); //保存到XML文檔
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return isSuccess;
        }
        #endregion
 
 
        #region XML文檔節(jié)點(diǎn)或?qū)傩缘膭h除
        /// <summary>
        /// 刪除匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)(節(jié)點(diǎn)中的子元素同時(shí)會被刪除)
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名</param>
        /// <returns>成功返回true,失敗返回false</returns>
        public static bool DeleteXmlNodeByXPath(string xmlFileName, string xpath)
        {
            bool isSuccess = false;
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    //刪除節(jié)點(diǎn)
                    xmlNode.ParentNode.RemoveChild(xmlNode);
                }
                xmlDoc.Save(xmlFileName); //保存到XML文檔
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 刪除匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)中的匹配參數(shù)xmlAttributeName的屬性
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名</param>
        /// <param name="xmlAttributeName">要刪除的xmlAttributeName的屬性名稱</param>
        /// <returns>成功返回true,失敗返回false</returns>
        public static bool DeleteXmlAttributeByXPath(string xmlFileName, string xpath, string xmlAttributeName)
        {
            bool isSuccess = false;
            bool isExistsAttribute = false;
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                XmlAttribute xmlAttribute = null;
                if (xmlNode != null)
                {
                    //遍歷xpath節(jié)點(diǎn)中的所有屬性
                    foreach (XmlAttribute attribute in xmlNode.Attributes)
                    {
                        if (attribute.Name.ToLower() == xmlAttributeName.ToLower())
                        {
                            //節(jié)點(diǎn)中存在此屬性
                            xmlAttribute = attribute;
                            isExistsAttribute = true;
                            break;
                        }
                    }
                    if (isExistsAttribute)
                    {
                        //刪除節(jié)點(diǎn)中的屬性
                        xmlNode.Attributes.Remove(xmlAttribute);
                    }
                }
                xmlDoc.Save(xmlFileName); //保存到XML文檔
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return isSuccess;
        }
 
        /// <summary>
        /// 刪除匹配XPath表達(dá)式的第一個(gè)節(jié)點(diǎn)中的所有屬性
        /// </summary>
        /// <param name="xmlFileName">XML文檔完全文件名(包含物理路徑)</param>
        /// <param name="xpath">要匹配的XPath表達(dá)式(例如:"//節(jié)點(diǎn)名//子節(jié)點(diǎn)名</param>
        /// <returns>成功返回true,失敗返回false</returns>
        public static bool DeleteAllXmlAttributeByXPath(string xmlFileName, string xpath)
        {
            bool isSuccess = false;
            XmlDocument xmlDoc = new XmlDocument();
            try
            {
                xmlDoc.Load(xmlFileName); //加載XML文檔
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
                if (xmlNode != null)
                {
                    //遍歷xpath節(jié)點(diǎn)中的所有屬性
                    xmlNode.Attributes.RemoveAll();
                }
                xmlDoc.Save(xmlFileName); //保存到XML文檔
                isSuccess = true;
            }
            catch (Exception ex)
            {
                throw ex; //這里可以定義你自己的異常處理
            }
            return isSuccess;
        }
        #endregion
 
    }
}

以上是“XML操作的示例分析”這篇文章的所有內(nèi)容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內(nèi)容對大家有所幫助，如果還想學(xué)習(xí)更多知識，歡迎關(guān)注億速云行業(yè)資訊頻道！