using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;

namespace UAS_Web.tool
{
    class BaseUtil
    {

        public static Object GetCacheData(string ParamName)
        {
            try
            {
                Object o = null;
                //根据地址读取xml文件
                XmlDocument doc = new XmlDocument();
                XmlReaderSettings settings = new XmlReaderSettings { CheckCharacters = false };
                //忽略文档里面的注释
                settings.IgnoreComments = true;
                XmlReader reader = XmlReader.Create(System.AppDomain.CurrentDomain.BaseDirectory + "cache.xml", settings);
                doc.Load(reader);
                //先得到根节点
                XmlNode rootNode = doc.SelectSingleNode("cacheInfo");
                //再由根节点去找制定的节点
                XmlNodeList nodeList = rootNode.ChildNodes;
                foreach (XmlNode node in nodeList)
                {
                    //找到了这个节点名字
                    if (node.Name == ParamName)
                    {
                        //返回节点的内容
                        switch (((XmlElement)node).GetAttribute("Type"))
                        {
                            case "System.String":
                                o = node.InnerText;
                                break;
                            case "System.Int32":
                                o = int.Parse(node.InnerText);
                                break;
                            case "System.Boolean":
                                o = node.InnerText == "True" ? true : false;
                                break;
                            default:
                                break;
                        }
                        break;
                    }
                }
                //关闭reader
                reader.Close();
                if (o == null)
                    return "";
                else
                    return o;
            }
            catch (Exception e)
            {
        
                return "";
            }
        }

        public static void SetCacheData(string ParamName, object Value)
        {
            try
            {
                //根据地址读取xml文件
                XmlDocument doc = new XmlDocument();
                XmlReaderSettings settings = new XmlReaderSettings { CheckCharacters = false };
                //忽略文档里面的注释
                settings.IgnoreComments = true;
                XmlReader reader = XmlReader.Create(System.AppDomain.CurrentDomain.BaseDirectory + "cache.xml", settings);
                doc.Load(reader);
                //先得到根节点
                XmlNode rootNode = doc.SelectSingleNode("cacheInfo");
                //再由根节点去找制定的节点
                XmlNodeList nodeList = rootNode.ChildNodes;
                bool flag = false;
                foreach (XmlNode node in nodeList)
                {
                    //找到了这个节点名字
                    if (node.Name == ParamName)
                    {
                        //就直接赋值
                        node.InnerText = Value.ToString();
                        flag = true;
                    }
                }
                //如果没有该节点，就创建节点保存结果
                if (!flag)
                {
                    //创建节点
                    XmlElement newNode = doc.CreateElement(ParamName);
                    XmlAttribute attr = doc.CreateAttribute("Type");
                    attr.InnerText = Value.GetType().ToString();
                    newNode.InnerText = Value.ToString();
                    newNode.SetAttributeNode(attr);
                    //讲新建的节点挂到根节点上
                    rootNode.AppendChild(newNode);
                }
                //关闭Reader
                reader.Close();
                doc.Save(System.AppDomain.CurrentDomain.BaseDirectory + "cache.xml");
            }
            catch (Exception e)
            {
              
            }
        }
    }
}