ASP.NET Cache简单应用一例

此实例是把系统错误提示信息存放在XML文件里，然后通过Cache存放进内存，共享使用。比较简单。
   
protected void Button3_Click(object sender, EventArgs e)
    {
        if (Cache.Get("DateFormatError") == null)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(Server.MapPath("ErrorMessage.xml"));
            XmlNodeList nodes = doc.SelectNodes("//Message//add");

            foreach (XmlNode node in nodes)
            {
                Cache.Insert(node.Attributes["name"].Value, node.Attributes["value"].Value);
            }
        }

        // Pop up alert window after page loading.
        string scriptString = "<script language='javascript'>" + "alert('" + Cache.Get("DateFormatError").ToString() + "') </script>";
        Page.RegisterStartupScript("pagescript", scriptString);
    }