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

public class XMLTest : MonoBehavIoUr
{
    void Start()
    {
        XmlDocument xml = CreateXML();
        AddNodeToXML(xml,"123","this is a xml test !请输入相关信息内容");
        AddNodeToXML(xml,"456","this is a xml test !请输入相关信息内容");
        UpdateNodeToXML();
        SaveXML(xml);
    }

    XmlDocument CreateXML()
    {
        //新建xml对象
        XmlDocument xml = new XmlDocument();
        //加入声明
        xml.AppendChild(xml.CreateXmlDeclaration("1.0","UTF-8",null));
        //加入根元素
        xml.AppendChild(xml.CreateElement("Root"));
        return xml;
    }

    void AddNodeToXML(XmlDocument xml,string titleValue,string infoValue)
    {
        //获取根节点
        XmlNode root = xml.SelectSingleNode("Root");
        //添加元素
        XmlElement element = xml.CreateElement("Node");
        element.SetAttribute("Type","string");

        //在Node节点下添加子节点
        XmlElement titleElelment = xml.CreateElement("Title");
        //titleElelment.SetAttribute("Title",TitleValue);
        titleElelment.InnerText = titleValue;

        XmlElement infoElement = xml.CreateElement("Info");
        //infoElement.SetAttribute("Info",infoValue);
        infoElement.InnerText = infoValue;

        element.AppendChild(titleElelment);
        element.AppendChild(infoElement);
        root.AppendChild(element);
    }

    void UpdateNodeToXML()
    {
        string filepath = Application.dataPath + @"/INFO.XML";
        if (File.Exists(filepath))
        {
            XmlDocument xmldoc = new XmlDocument();
            xmldoc.Load(filepath);  //根据指定路径加载xml
            XmlNodeList nodeList = xmldoc.SelectSingleNode("Root").ChildNodes; //Node节点
            //遍历所有子节点
            foreach (XmlElement xe in nodeList)
            {
                //拿到节点中属性Type=“string”的节点
                if (xe.GetAttribute("Type") == "string")
                {
                    //更新节点属性
                    xe.SetAttribute("type","text");
                    //继续遍历
                    foreach (XmlElement xelement in xe.ChildNodes)
                    {
                        if (xelement.Name == "TitleNode")
                        {
                            //修改节点名称对应的数值，而上面的拿到节点连带的属性
                            //xelement.SetAttribute("Title","企业简介");
                            xelement.InnerText = "企业简介";
                        }
                    }
                    break;
                }
            }
            xmldoc.Save(filepath);
            print("Update XML OK!");
        }
    }

    void SaveXML(XmlDocument xml)
    {
        //存储xml文件
#if UNITY_EDITOR || UNITY_STANDALONE
        xml.Save(Application.dataPath + "/StreamingAssets/INFO.XML");
#elif UNITY_ANDROID
        xml.Save(Application.persistentDataPath + "/INFO.xml");
#endif
    }
}