[游戏开发]Unity XML 新建 查询 修改 增加 删除

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

public class xmll : MonoBehaviour
{
// Start is called before the first frame update
void Start()
{
LoadXml("/coom.xml");
ModifyXML("/coom.xml");
DeleteXML("/coom.xml");
AddXML("/coom.xml");
EstablishXML();
}

void LoadXml(string path)
{
    XmlDocument xd = new XmlDocument();
    //加载路径
    xd.Load(Application.streamingAssetsPath + path);
    //查找根节点并得到
    XmlNode RootNode = xd.SelectSingleNode("root");
    //查找初始状态子集点
    XmlNodeList BeginNode = RootNode.SelectNodes("BeginStatus");
    //遍历子节点并添加到队列中，获取详细信息
    foreach (XmlNode item in BeginNode)
    {
        XmlElement BeginXmlEle = (XmlElement)item;
        BeginStatusobj bs = new BeginStatusobj()
        {
            id = int.Parse(BeginXmlEle.GetAttribute("id")),
            ObjName = BeginXmlEle.GetAttribute("Name"),
            Type = BeginXmlEle.GetAttribute("Type"),
        };

        print(bs.id);
        print(bs.ObjName);
        print(bs.Type);
    }


    XmlNodeList StepNode1 = RootNode.SelectNodes("Step");
    //遍历子节点并添加到队列中，获取详细信息
    foreach (XmlNode item in StepNode1)
    {
        XmlElement StepXmlEle = (XmlElement)item;
        Pract bs = new Pract()
        {
            id = int.Parse(StepXmlEle.GetAttribute("id")),
            ObjName = StepXmlEle.GetAttribute("Name"),
            Type = StepXmlEle.GetAttribute("Type"),
        };
        //若此条xml数据中有entext 则执行这一步
        if (StepXmlEle.HasAttribute("entext"))
        {
            bs.entext = StepXmlEle.GetAttribute("entext");
        }

        if (StepXmlEle.HasAttribute("Angle"))
        {
            
           bs.Angle =int.Parse(StepXmlEle.GetAttribute("Angle"));
        }

        print(bs.id);
        print(bs.ObjName);
        print(bs.Type);
        print(bs.entext);
        print(bs.Angle);
    }

    XmlNodeList EndNode = RootNode.SelectNodes("End");

    foreach (XmlNode item in EndNode)
    {
        XmlElement EndElem = (XmlElement)item;
        //拆解整条数据
        print(EndElem.GetAttribute("id"));
        print(EndElem.GetAttribute("Name"));
        print(EndElem.GetAttribute("Type"));

    }
}

//修改XML
void ModifyXML(string path)
{
    //方法一  全局查找  不管有多少个子节点  
    //XmlDocument xd = new XmlDocument();
    加载路径
    //xd.Load(Application.streamingAssetsPath + path);
    查找根节点并得到
    //XmlNodeList xl = xd.SelectSingleNode("root").ChildNodes;

    //foreach (XmlElement item in xl)
    //{
    //    if (item.GetAttribute("id")=="1")
    //    {
    //        item.SetAttribute("id", "5");
    //    }
    //}

    //方法二  定向查找 适合多个子节点
    XmlDocument xd = new XmlDocument();
    //加载路径
    xd.Load(Application.streamingAssetsPath + path);
    //查找根节点并得到
    XmlNode RootNode = xd.SelectSingleNode("root");
    //查找初始状态子集点
    XmlNodeList BeginNode = RootNode.SelectNodes("BeginStatus");
    //遍历子节点并添加到队列中，获取详细信息
    foreach (XmlNode item in BeginNode)
    {
        XmlElement BeginXmlEle = (XmlElement)item;
        if (BeginXmlEle.GetAttribute("id")=="1")
        {
            BeginXmlEle.SetAttribute("id", "5");
        }

    }
        xd.Save(Application.streamingAssetsPath + path);
}
//删除节点
void DeleteXML(string path)
{
    XmlDocument xd = new XmlDocument();
    //加载路径
    xd.Load(Application.streamingAssetsPath + path);
    //查找根节点并得到
    XmlNode RootNode = xd.SelectSingleNode("root");
    //查找初始状态子集点
    XmlNodeList BeginNode = RootNode.SelectNodes("BeginStatus");
    //遍历子节点并添加到队列中，获取详细信息
    foreach (XmlNode item in BeginNode)
    {
        XmlElement BeginXmlEle = (XmlElement)item;
        if (BeginXmlEle.GetAttribute("id") == "5")
        {
            BeginXmlEle.RemoveAll();//只会删除字段  不会删除节点
            BeginXmlEle.ParentNode.RemoveChild(BeginXmlEle);//会将子节点删除
        }

    }
    xd.Save(Application.streamingAssetsPath + path);
}

//增加子节点
void AddXML(string path)
{
    XmlDocument xd = new XmlDocument();
    //加载路径
    xd.Load(Application.streamingAssetsPath + path);
    //查找根节点并得到
    XmlNode RootNode = xd.SelectSingleNode("root");
    //创建根节点下的子节点
    XmlElement xe = xd.CreateElement("Star");
    xe.SetAttribute("id", "2");
    xe.SetAttribute("Name", "po");
    xe.SetAttribute("Type", "54");

    RootNode.AppendChild(xe);//添加元素

    //在已有的子节点添加数据
    XmlElement xet = xd.CreateElement("End");
    RootNode.AppendChild(xet);
    for (int i = 0; i < RootNode.ChildNodes.Count; i++)
    {
        XmlElement xmlelem = RootNode.ChildNodes[i] as XmlElement;

        if (xmlelem.GetAttribute("id")=="1")//在所有id=1的下面添加新的数据
        {
            XmlElement xmlt = xd.CreateElement("End");
            xmlt.SetAttribute("id", "2");
            xmlelem.AppendChild(xmlt);
        }
    }


    xd.Save(Application.streamingAssetsPath + path);
}

//创建xml文件
void EstablishXML()
{
    
    XmlDocument xd = new XmlDocument();
    //创建最上面一层的节点
    XmlElement root = xd.CreateElement("Root");
    //创建子节点
    XmlElement element = xd.CreateElement("Start");
    //设置节点属性
    element.SetAttribute("id", "1");
    element.SetAttribute("Name", "op");
    element.SetAttribute("Type", "ui");
    //设置数据内面
    element.InnerText = "kldjfkldsj";
    XmlElement element1 = xd.CreateElement("Start");
    //设置节点属性
    element1.SetAttribute("id", "2");
    element1.SetAttribute("Name", "op");
    element1.SetAttribute("Type", "ui");
    root.AppendChild(element1);
    root.AppendChild(element);
    xd.AppendChild(root);
    xd.Save(Application.streamingAssetsPath + "/coo.xml");

}

}

public class BeginStatusobj
{
public int id;
public string ObjName;
public string Type;
}

public class Pract
{
public int id;

public string ObjName;

public string Type;

public string entext;

public int Angle;

}

xml 文件
coom

coo 创建后的