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
FreeTextBox(版本3.1.6)在ASP.Net 2.0中使用方法
.NET 常用功能和代码小结
在 .NET Framework 2.0 中未处理的异常导致基于 ASP.NET 的应用程序意外退出
asp.net IList查询数据后格式化数据再绑定控件
asp.net sql存储过程
asp.net 简单实现禁用或启用页面中的某一类型的控件
asp.net(c#)获取内容第一张图片地址的函数
The remote procedure call failed and did not execute的解决办法
ASP.NET 在线文件管理
asp.net 读取并修改config文件实现代码
ASP.NET Cookie 操作实现
asp.net Silverlight中的模式窗体
Silverlight中动态获取Web Service地址
asp.net Silverlight应用程序中获取载体aspx页面参数
asp.net 水晶报表隔行换色实现方法
asp.net 获取Gridview隐藏列的值
手动把asp.net的类生成dll文件的方法
asp.net 使用ObjectDataSource控件在ASP.NET中实现Ajax真分页
动态指定任意类型的ObjectDataSource对象的查询参数
asp.net Md5的用法小结

No. « 164 165 166 167 »

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: 68 ::
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","","") ;