Asp.Net缓存实例

using System.Web; 



public string GetLeaderInfo(string symbol)

{

    //获取高管信息的路径         

    XElement ele = XElement.Load("path.xml");

    string path = ele.Element("leader").Value;



    //首次读取缓存

    string jsoncache = HttpRuntime.Cache.Get(symbol) as string;

    if (jsoncache == null || jsoncache.Equals(""))

    {

        //读取数据

        XmlDocument doc = new XmlDocument();

        doc.Load(path);



        string strSearch = "root/高管信息[@代码='" + symbol + "']";



        XmlNode searchNode = doc.SelectSingleNode(strSearch);

        XmlElement element = (XmlElement)searchNode;

        xmltoJson json = new xmltoJson();

        jsoncache = json.XmlToJSON(element);

        //加缓存

        HttpRuntime.Cache.Insert(symbol, jsoncache, null, DateTime.UtcNow.AddMinutes(2), System.Web.Caching.Cache.NoSlidingExpiration);

    }

    return jsoncache;

}