Unity3D C# 读写XML

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效果
代码
using UnityEngine;using System.IO;using System.Xml;using System.Collections;public class XMLTest : MonoBehaviour {    private string _xmlPath;    private string _userId = "";    private string _userName = "";// Use this for initializationvoid Start ()     {        //xml路径        _xmlPath = Application.dataPath + "/test.xml";        CreatXML();}// Update is called once per framevoid Update ()     {}    void CreatXML()    {        //检测xml是否存在        if (!File.Exists(_xmlPath))        {            //新建xml实例            XmlDocument xmlDoc = new XmlDocument();            //创建根节点，最上层节点            XmlElement data = xmlDoc.CreateElement("data");            xmlDoc.AppendChild(data);            //二级节点            XmlElement user = xmlDoc.CreateElement("user");            data.AppendChild(user);            //二级节点的两个属性             XmlElement userId = xmlDoc.CreateElement("userId");             user.AppendChild(userId);            XmlElement userName = xmlDoc.CreateElement("userName");            user.AppendChild(userName);                        //将xml文件保存到本地            xmlDoc.Save(_xmlPath);            Debug.Log("xml creat success!");        }    }    void OnGUI()    {        GUI.Button(new Rect(0, 0, 100, 50), "UserId");        _userId = GUI.TextField(new Rect(100, 0, 100, 50), _userId);        GUI.Button(new Rect(0, 50, 100, 50), "UserName");                _userName = GUI.TextField(new Rect(100, 50, 100, 50), _userName);        if(GUI.Button(new Rect(200,25,100,50),"更改"))        {            UpdateXml(_userId, _userName);        }                //GUI.Button(new Rect(0, 100, 150, 50), "UserId" + _userId);        //GUI.Button(new Rect(0, 150, 150, 50), "UserName" + _userName);    }    void UpdateXml(string  userId,string userName)    {        if (File.Exists(_xmlPath))        {            XmlDocument xmlDoc = new XmlDocument();            xmlDoc.Load(_xmlPath);            XmlNodeList nodeList = xmlDoc.SelectSingleNode("data/user").ChildNodes;            foreach (XmlElement xe in nodeList)            {                Debug.Log(nodeList.Count);                if (xe.Name == "userId")                {                    xe.InnerText = userId;                    Debug.Log("edit");                                    }                if (xe.Name == "userName")                {                    xe.InnerText = userName;                    break;                }            }            xmlDoc.Save(_xmlPath);        }    }}