Number of online users in Asp.net

This is a simple program that provides Code directly. It mainly modifies the content of the global. asax file...

<% @ Application language = "C #" %>

<SCRIPT runat = "server">

Void application_start (Object sender, eventargs E)
{
// Code that runs when the application starts
// Initialization
Application ["counter"] = 0;
}

Void application_end (Object sender, eventargs E)
{
// Code that runs when the application is closed

}

Void application_error (Object sender, eventargs E)
{
// Code that runs when an unhandled error occurs

}

Void session_start (Object sender, eventargs E)
{
// The code that runs when the new session starts
// Lock the application to prevent Parallelism
Application. Lock ();
// Increase the number of online users
Application ["counter"] = (INT) application ["counter"] + 1;
// Unlock
Application. Unlock ();
}

Void session_end (Object sender, eventargs E)
{
// The code that runs when the session ends.
// Note: Only the sessionstate mode in the web. config file is set
// The session_end event is triggered only when inproc is used. If the session mode is set to StateServer
// Or sqlserver, the event is not triggered.

// Lock the application to prevent Parallelism
Application. Lock ();
// Reduce the number of online users
Application ["counter"] = (INT) application ["counter"]-1;
// Unlock
Application. Unlock ();
}

</SCRIPT>

The above are all explained accordingly. in addition, when loading the page, you can assign the application ["counter"] to a control for display. in this way, the number of online users is displayed during page loading.
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Source: http://www.yxsoft.net.cn/article.asp? Id = 34