当前位置: 首页 > 图文教程 > 网络编程 > ASP.NET > ASP.NET结合XML编写计数器

ASP.NET
ASP.NET开发:简化应用程序的开发支持Web标准
asp.net XMLHttpRequest实现用户注册前的验证
asp.net 页面间传值方法小结
asp.net url重写浅谈
asp.net 验证码生成和刷新及验证
C#精髓 GridView72大绝技 学习gridview的朋友必看
实例说明asp.net中的简单角色权限控制
asp.net网站开发包wq.dll打包下载
js与ASP.NET 中文乱码问题
asp.net checkbox 动态绑定id GridView删除提示
asp.net TextBox回车触发事件 图片在img显示
asp.net 脏字典过滤问题 用正则表达式来过滤脏数据
asp.NET 脏字过滤算法
asp.NET 脏字过滤算法 修改版
asp.net sql 数据库处理函数命令
asp.net Javascript 的几种写法与提示
ASP.NET MVC学习笔记
asp.net 中国身份证号码验证代码 非正则
Asp.net中使用Sqlite数据库的方法
asp.net 中文字符串提交乱码的解决方法

No. « 161 162 163 164 »

技术文章搜索

关键字

ASP.NET结合XML编写计数器

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-08-14   浏览: 90 ::
收藏到网摘: n/a

以下为引用的内容：

Code:
1) counter.aspx :- The Counter Page

<%@ Import Namespace="System.IO" %>
<%@ Assembly Name="System.xml(标准化越来越近了)" %>
<%@ Import Namespace="System.xml(标准化越来越近了)" %>
<%@ page language="c#" EnableSessionState="True" %>
<%-- These are the imported assembiles and namespaces need to run the counter --%>
<html>
<head>
<title>Saurabh's xml(标准化越来越近了) 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(标准化越来越近了) 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/xml(标准化越来越近了)counter.xml(标准化越来越近了)" ;

if(!Page.IsPostBack){
//try-catch block containing the counter code
try {
//create an instance of the class xml(标准化越来越近了)Document
xml(标准化越来越近了)Document xml(标准化越来越近了)document = new xml(标准化越来越近了)Document() ;

//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
xml(标准化越来越近了)document.Load(new StreamReader(fin)) ;
fin.Close();
//create an instance of the DocumentNavigator class used to
//navigate through and xml(标准化越来越近了) file
DocumentNavigator navigator = new DocumentNavigator(xml(标准化越来越近了)document) ;

//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 xml(标准化越来越近了)counter.xml(标准化越来越近了) 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 N "+total.ToString() ;
//save the incremented counter back in the xml(标准化越来越近了) 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 , xml(标准化越来越近了)NodeType.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, xml(标准化越来越近了)NodeType.Element,"Referrer","","");
navigator.Insert(TreePosition.FirstChild, xml(标准化越来越近了)NodeType.Text,"Referrer","","") ;