Unity XML 操作

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.IO;
using System.Text;

public void createXml()
{
//xml保存的路径，这里放在Assets路径 注意路径。
string filepath = Application.dataPath + @"/my.xml";
//继续判断当前路径下是否有该文件
if(!File.Exists (filepath))
{
//创建XML文档实例
XmlDocument xmlDoc = new XmlDocument();
//创建root节点，也就是最上一层节点
XmlElement root = xmlDoc.CreateElement("transforms");
//继续创建下一层节点
XmlElement elmNew = xmlDoc.CreateElement("rotation");
//设置节点的两个属性 ID 和 NAME
elmNew.SetAttribute("id","0");
elmNew.SetAttribute("name","momo");
//继续创建下一层节点
XmlElement rotation_X = xmlDoc.CreateElement("x");
//设置节点中的数值
rotation_X.InnerText = "0";
XmlElement rotation_Y = xmlDoc.CreateElement("y");
rotation_Y.InnerText = "1";
XmlElement rotation_Z = xmlDoc.CreateElement("z");
rotation_Z.InnerText = "2";
//这里在添加一个节点属性，用来区分。。
rotation_Z.SetAttribute("id","1");

//把节点一层一层的添加至XMLDoc中 ，请仔细看它们之间的先后顺序，这将是生成XML文件的顺序
elmNew.AppendChild(rotation_X);
elmNew.AppendChild(rotation_Y);
elmNew.AppendChild(rotation_Z);
root.AppendChild(elmNew);
xmlDoc.AppendChild(root);
//把XML文件保存至本地
xmlDoc.Save(filepath);
Debug.Log("createXml OK!");
}
}

<transforms>
<rotation id="0" name="momo">
<x>0</x>
<y>1</y>
<z id="1">2</z>
</rotation>
</transforms>

public void UpdateXml()
{
string filepath = Application.dataPath + @"/my.xml";
if(File.Exists (filepath))
{
XmlDocument xmlDoc = new XmlDocument();
//根据路径将XML读取出来
xmlDoc.Load(filepath);
//得到transforms下的所有子节点
XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes;
//遍历所有子节点
foreach(XmlElement xe in nodeList)
{
//拿到节点中属性ID =0的节点
if(xe.GetAttribute("id")=="0")
{
//更新节点属性
xe.SetAttribute("id","1000");
//继续遍历
foreach(XmlElement x1 in xe.ChildNodes)
{
if(x1.Name=="z")
{
//这里是修改节点名称对应的数值，而上面的拿到节点连带的属性。。。
x1.InnerText="update00000";
}
}
break;
}
}
xmlDoc.Save(filepath);
Debug.Log("UpdateXml OK!");
}
}

<transforms>
<rotation id="1000" name="momo">
<x>0</x>
<y>1</y>
<z id="1">update00000</z>
</rotation>
</transforms>

public void AddXml()
{
string filepath = Application.dataPath + @"/my.xml";
if(File.Exists (filepath))
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(filepath);
XmlNode root = xmlDoc.SelectSingleNode("transforms");
XmlElement elmNew = xmlDoc.CreateElement("rotation");
elmNew.SetAttribute("id","1");
elmNew.SetAttribute("name","yusong");
XmlElement rotation_X = xmlDoc.CreateElement("x");
rotation_X.InnerText = "0";
rotation_X.SetAttribute("id","1");
XmlElement rotation_Y = xmlDoc.CreateElement("y");
rotation_Y.InnerText = "1";
XmlElement rotation_Z = xmlDoc.CreateElement("z");
rotation_Z.InnerText = "2";
elmNew.AppendChild(rotation_X);
elmNew.AppendChild(rotation_Y);
elmNew.AppendChild(rotation_Z);
root.AppendChild(elmNew);
xmlDoc.AppendChild(root);
xmlDoc.Save(filepath);
Debug.Log("AddXml OK!");
}
}

<transforms>
<rotation id="1000" name="momo">
<x>0</x>
<y>1</y>
<z id="1">update00000</z>
</rotation>
<rotation id="1" name="yusong">
<x id="1">0</x>
<y>1</y>
<z>2</z>
</rotation>
</transforms>

public void deleteXml()
{
string filepath = Application.dataPath + @"/my.xml";
if(File.Exists (filepath))
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(filepath);
XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes;
foreach(XmlElement xe in nodeList)
{
if(xe.GetAttribute("id")=="1")
{
xe.RemoveAttribute("id");
}
foreach(XmlElement x1 in xe.ChildNodes)
{
if(x1.Name == "z")
{
x1.RemoveAll();
}
}
}
xmlDoc.Save(filepath);
Debug.Log("deleteXml OK!");
}
}

<transforms>
<rotation id="1000" name="momo">
<x>0</x>
<y>1</y>
<z>
</z>
</rotation>
<rotation name="yusong">
<x id="1">0</x>
<y>1</y>
<z>
</z>
</rotation>
</transforms>

public void showXml()
{
string filepath = Application.dataPath + @"/my.xml";
if(File.Exists (filepath))
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(filepath);
XmlNodeList nodeList=xmlDoc.SelectSingleNode("transforms").ChildNodes;
//遍历每一个节点，拿节点的属性以及节点的内容
foreach(XmlElement xe in nodeList)
{
Debug.Log("Attribute :" + xe.GetAttribute("name"));
Debug.Log("NAME :" + xe.Name);
foreach(XmlElement x1 in xe.ChildNodes)
{
if(x1.Name == "y")
{
Debug.Log("VALUE :" + x1.InnerText);
}
}
}
Debug.Log("all = " + xmlDoc.OuterXml);
}
}