繁體中文当前位置: 首页 > 图文教程 > 网络编程 > ASP > ASP.NET: XML计数器第二版
- ASP
- 对数据库中的记录用上一条下一条显示（二）
- 对数据库中的记录用上一条下一条显示（三）
- 完整的站点访问统计系统（一：数据库篇）
- FIF小组ASP互动视频教程
- 关于ASP,ASP.NET,VB.NET里的MD5加密函数
- ASP正则表达式详解
- ASP中非数据库实现数据对象的定义及处理
- 编程爱好者的福音 让IIS6.0支持ASP
- 使用xml http为网站增加域名查询功能
- 用ASP实现支持附件的EMail系统
- 使用ADO.net将数据导出到Excel并提供下载
- ASP实现图片上传
- asp组件上传
- ASPX页Web服务调用性能优化
- asp实现语音上传
- VBScript教程 第六课
- VBScript教程 第三课
- 使ASP程序跨浏览器
- 四步讲解ASP中正则表达式的应用
- ASP教程：深入认识学习ASP应用Cookies的技巧
ASP.NET: XML计数器第二版
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-11-03 浏览: 34 ::
收藏到网摘: n/a
1) counter.aspx :- The Counter Page
<%@ Import Namespace="System.IO" %>
<%@ Assembly Name="System.Xml" %>
<%@ Import Namespace="System.Xml" %>
<%@ page language="c#" EnableSessionState="True" %>
<%-- These are the imported assembiles and namespaces need to run the counter --%>
<html>
<head>
<title>Saurabh's XML Counter Script</title>
<script language="C#" runat="server">
//script is called when the page is loaded
public void Page_Load(Object src, EventArgs e)
{
//the path to the Xml file which will contain all the data
//modify this if you have any other file or directory mappings.
//modify this if you have been directed here from Step 2 of the ReadMe file.
string datafile="db/xmlcounter.xml" ;
if(!Page.IsPostBack){
//try-catch block containing the counter code
try {
//create an instance of the class XmlDocument
XmlDocument xmldocument = new XmlDocument() ;
//Open a FileStream to the specified file
FileStream fin ;
//It is very Important to specify the "FileShare.ReadWrite" option.
//This allows other viewers to also read and write to the Database
//This was missing in my last release hence there was a BUG !!!
fin = new FileStream(Server.MapPath(datafile), FileMode.Open, FileAccess.Read,
FileShare.ReadWrite) ;
//Load the Document
xmldocument.Load(new StreamReader(fin)) ;
fin.Close();
//create an instance of the DocumentNavigator class used to
//navigate through and XML file
DocumentNavigator navigator = new DocumentNavigator(xmldocument) ;
//Move to the first element (in my file 'Visitors')
navigator.MoveToDocumentElement() ;
//move to it child at position '0' (ie.in my file 'total' node)
navigator.MoveToChild(0) ;
//check if we are on the right element which has an attribute
if (navigator.HasAttributes) {
//get the attribute of the node 'total' called 'tot' (see the xmlcounter.xml file)
//since the value stored is in a string format we 'cast' it into a Int type
int total = int.Parse(navigator.GetAttribute("tot")) ;
//increase the counter
total++ ;
//show the counter on the page
countmess.Text = "You are visitor No: "+total.ToString() ;
//save the incremented counter back in the XML file
navigator.SetAttribute(0,total.ToString() );
}
//Update the Database only if a new session is there
if(Session["counter"]==null)
{
//move back to the Document element
navigator.MoveToDocumentElement() ;
navigator.MoveToChild(0) ;
//then insert the element after the 'total' element which will contain all
//the information of a single visitor
navigator.Insert(TreePosition.After , XmlNodeType.Element, "Viewer","","") ;
//make an instance to the HttpUrl class to get information of the referrer to
//the page if any. if there are no referrers then by Default this object is 'null'
//so we have to make a check if it is null and do the needful
HttpUrl objUrl = Request.UrlReferrer;
if(objUrl!=null)
{
navigator.Insert(TreePosition.FirstChild, XmlNodeType.Element,"Referrer","","");
navigator.Insert(TreePosition.FirstChild, XmlNodeType.Text,"Referrer","","") ;
navigator.Value = objUrl.Host ;
}
else
{
navigator.Insert(TreePosition.FirstChild, XmlNodeType.Element,"Referrer","","");
navigator.Insert(TreePosition.FirstChild, XmlNodeType.Text,"Referrer","","") ;
navigator.Value = "Direct" ;
}
//release the resource for Garbage collection
objUrl=null ;
//move to parent node and then insert the information about the useragent
navigator.MoveToParent() ;
navigator.Insert
评论 (0) All
