繁體中文当前位置: 首页 > 图文教程 > 网络编程 > ASP > 用多种方法制作WEB页面的计数器
- ASP
- 一种比较方便的ASP分页程序
- 用一套论坛程序架设多个论坛
- ASP与ASP.NET在COOKIE方面的区别
- 较长数据无法在Asp页面中取出的三种解决方法
- 初试WAP之wml＋ASP查询
- 动态网站首页的静态生成方法
- 使用正则表达式实现模式图片新闻.ASP
- 让你的WAP网站有更好的兼容性
- WAP版的手机号码所在地查询
- asp模仿 Lotus Notes 的界面程序
- ORACLE920与ASP的连接问题的解决办法
- 利用SQLSERVER存储过程实现ASP用户身份验证
- 在ASP中自动创建多级文件夹的函数(使用FSO)
- 利用instr()函数防止SQL注入攻击
- 利用XSL和ASP实现XML文档在线编辑
- 表单对象textarea内容的格式控制（回车、换行、空格）
- 针对select写了一个通用的option输出函数
- ASP无组件BMP汉字生成类+汉字点阵库
- 时间、空间性能极优的asp无组件上传类
- 无组件生成BMP验证码
ASP 中的 用多种方法制作WEB页面的计数器
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-11-03 浏览: 124 ::
收藏到网摘: n/a
Do you like to know how many users visited your site? Creating a Web counter is very easy thing to do
using ASP. The only thing you have to do is to use an application server variable called count, this
variable will have the value zero when your application is started for the first time, and every time anew
visitor will come to your site the count variable will be incremented, the increment section will be
written in the Session_OnStart in the Global.asa through three steps:
¨ Lock the application server so no more than one visitor will try to increase it at the same time.
¨ Increment the count variable by one.
¨ Unlock the variable.
And that’s all what you have to do to create a simple counter and here is the code.
First let us do the Global.asa section:
<SCRIPT LANGUAGE=VBScript RUNAT=Server>
Sub Session_OnStart
' Lock the Application object
Application.Lock
' Increment the count
Application("count") = Application("count") + 1
' Unlock the Application object
Application.Unlock
End Sub
</SCRIPT>
And now to show the result you just need to retrieve the count variable like this in your web page:
<%@ language="vbscript"%>
<HTML>
<HEAD>
<TITLE>Counter Example 1</TITLE>
</HEAD>
<BODY>
<H1> You are the visitor number <%=Application("count")%></H1>
</BODY>
</HTML>
Another way to do it:
Ok that’s very nice, but what will happen if the application stops for any reason? You will lose all the
data stored in the application variables and that includes the count variable. To solve this problem I
will use another way, you need to store the value of the count variable with in a text file or database.
For me I prefer database so I will use an MS access database with a table of one field called count and
the field called counter of type NUMBER.
<%
' Declare the variables that will be used with our code
Dim Connection, RS, ConStr, Counts
' Create and open the database connection
Set Connection=Server.Createobjec t("ADODB.Connection")
ConStr=("DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.MapPath ("counter.mdb"))
Connection.Open ConStr
' Create the record set and retrive the counter value
Set RS = Connection.Execute("SELECT * FROM count")
' Increase the counter value by one
Counts=RS("counter")+1
' Update the counter value in the database
Set RS = Connection.Execute ("UPDATE count SET counter =" & Counts)
Connection.Close
%>
<HTML>
<HEAD>
<TITLE>Counter Example 2</TITLE>
</HEAD>
<BODY>
<H1>You are the visitor number <%=Counts%></H1>
</BODY>
</HTML>
What about Active users:
Some guys wants to know how many visitors are currently seeing the site, for that we will use another way,
we will create an application variable called active, and on each new session we will increase it by one
and when a session ends we will decrease it by one, and here is the code:
The Global.asa:
<SCRIPT LANGUAGE="VBScript" RUNAT="Server">
Sub Application_OnStart
'Create the variable that will hold the number of active visitors
Application("Active") = 0
End Sub
Sub Session_OnStart
'Increase the counter by one
Application.Lock
Application("Active") = Application("Active") + 1
评论 (0) All
