XML的使用（借鉴大神，仅作为笔记用）

1.引用命名空间

using System.Xml;

using System.IO;

2.生成Xml

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!");

 

}

 

} 2.

更新XML文件

以其中某个节点名称做条件，当查询到时更新该节点

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!"); }   } 3.添加XML   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!"); } } 4.删除XML   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!"); }   } 4.解析与输出上面的XML 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);   } }

 

 

标签：XML,filepath,大神,笔记,节点,XmlElement,elmNew,rotation,xmlDoc
来源： https://www.cnblogs.com/Damon-3707/p/11431479.html