C# 操作XML文件 XmlDocument和XElement

刺骨的言语ヽ痛彻心扉 2022-01-30 13:17 283阅读 0赞

首先在根目录下新建一个config.xml：

<?xml version="1.0" encoding="utf-8"?>
    <Config>
        <Debug>
            <Lan>
                <Server Ip="142.12.10.123" Port="9601"/>
            </Lan>
            <Logger enable="false" />
        </Debug>
    </Config>

XmlDocument位于System.Xml 下，是专门处理xml节点的

XElement位于System.Xml.Linq下，是可以对xml进行linq的查询操作的

分别使用XmlDocument和XElement获取节点的值：

using System;
    using System.IO;
    using System.Reflection;
    using System.Xml;
    using System.Xml.Linq;
    
    namespace FileXml
    {
        class Program
        {
            static void Main(String[] args)
            {
                //获取xml路径
                var current_dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
                var xml_path = Path.Combine(current_dir, @"config.xml");
    
                //使用XElement快速获取节点值
                XElement xmlElement = XElement.Load(xml_path);
                String IP = xmlElement.Element("Debug").Element("Lan").Element("Server").Attribute("Ip").Value.ToString();
                Console.WriteLine(IP);
                bool isLogger = xmlElement.Element("Debug").Element("Logger").Attribute("enable").Value == "true";
                Console.WriteLine(isLogger);
    
    
    
                //使用XElement快速获取节点值
                XmlDocument xml_doc = new XmlDocument();
                xml_doc.Load(xml_path);
                var IP2 = xml_doc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Value;
                var IP2_name = xml_doc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Name;
                Console.WriteLine(IP2_name+":"+ IP2);
                bool isLogger2 = xml_doc.SelectSingleNode("/Config/Debug/Logger").Attributes["enable"].Value == "true";
                Console.WriteLine(isLogger2);
                Console.ReadLine();
            }
        }
    }

总结：如果是简单查询 总体上来说两者差不多

感觉还是XmlDocument.SelectSingleNode(XPath)更方便一些

普通用XmlDocument就够了

Xml单例管理类：

using System;
    using System.IO;
    using System.Reflection;
    using System.Xml;
    
    namespace FileXml
    {
        class Program
        {
            static void Main()
            {
                var ip = XmlManager.instance.XmlDoc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Value;
                var ip_name = XmlManager.instance.XmlDoc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Name;
                Console.WriteLine($"{ip_name} : {ip}");
                bool isLogger = XmlManager.instance.XmlDoc.SelectSingleNode("/Config/Debug/Logger").Attributes["enable"].Value == "true";
                Console.WriteLine(isLogger);
                Console.ReadLine();
            }
        }
    
        public class XmlManager
        {
            private static XmlManager _instance = null;
            public static XmlManager instance
            {
                get
                {
                    if (_instance == null)
                    {
                        return new XmlManager();
                    }
                    return _instance;
                }
            }
    
            private XmlDocument _xml_doc = null;
            public XmlDocument XmlDoc
            {
                get
                {
                    if (_xml_doc == null)
                    {
                        var current_dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
                        var xml_path = Path.Combine(current_dir, @"config.xml");
                        _xml_doc = new XmlDocument();
                        _xml_doc.Load(xml_path);
                    }
                    return _xml_doc;
                }
            }
        }
    }