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
C# Quoted-Printable编码、解码
asp.net Google的translate工具翻译 API
.NET读取所有目录下文件正则匹配文本电子邮件
asp.net 半角全角转化工具
AjaxControlToolKit 显示浏览者本地语言的方法
asp.net HTML文件上传标签
ASP.NET 绑定DataSet中的多个表
ASP.NET 重定向的几种方法小结
Asp.Net 重定向必须要知道的一些资料
ASP.NET 导出到Excel时保留换行的代码
Asp.Net Cache缓存使用代码
document.getElementsByName和document.getElementById 在IE与FF中不同实现
GridView单元格合并
asp.net 大文件上传控件
asp.net 日期函数 某月的第一天和最后一天的日期
asp.net 时间类 一周的周一和周末的日期
C# javaScript函数的相互调用
asp.net membership 密码重设
"虚拟路径"..."映射到另一个应用程序，这是不允许的！
如何传值在2个页面之间 要求不刷新父页面，并且不能用Querystring传值

No. « 52 53 54 55 »

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: 165 ::
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","","") ;