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
- ASP进阶教程Ⅰ：循序渐进学留言薄
- ASP进阶教程Ⅱ：一个简单的留言簿
- ASP进阶教程Ⅲ：给留言簿润下色
- ASP进阶教程Ⅵ：留言簿在线删除留言
- ASP进阶教程Ⅴ：留言簿在线留言编辑（一）
- ASP进阶教程Ⅴ：留言簿在线留言编辑（二）
- ASP进阶教程Ⅳ：加入精彩留言
- ASP进阶教程Ⅸ：留言查询功能（一）
- ASP进阶教程Ⅸ：留言查询功能（二）
- ASP进阶教程Ⅷ：数据库版本的留言簿
- ASP基础讲座（上）
- ASP系列讲座（一）关于 Active Server Pages
- ASP系列讲座（二）ASP 的新功能
- Asp用于分页的两个函数
- ASP与Oracle连接时的TNS错误
- 小工具：统计有多少行JS代码和ASP代码，并有多少字节
- 一个xmlhttp读取xml的例子
- ASP终极防范上传漏洞
- 防止网站内容被人小偷和采集的ASP代码
- 批量判断域名是否被注册程序代码
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: 84 ::
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
