Asp.net--application object, Session object, server object __.net

One, Application object

It is equivalent to an application set, similar to a global variable, so it can be shared, primarily to implement page usage information in your application, such as database connection information. Method is a collection, key, and key-value pairs.

such as the Lock method:

<%
application.lock
application ("visits") =application ("visits") +1
application.unlock
%> This

page has been visited
<%=application ("visits")%> times!

You can prevent more than one user from accessing the visits at the same time and unlocking it with unlock.

Second, Session object

Used to store or change information about a user's session, he is the interaction between each user and the server, so he is local.

For example, traversing the content collection

<% for each
x in application.contents
  Response.Write (x & "=" & Application.Contents (x) & "<br& gt; ")
Next
%>

or:

<% for
i=1 to Application.Contents.Count
  Response.Write (i & "=" & Application.Contents (i) & "<br>")
Next
%>

Three, the server object.

Used to get the call between the server information and the local.

For example, you cannot create an object with the same name as a built object

<%
Set application=server.createobject ("Application")
%>

In summary, the entire application has only one application object, and everyone can access the Server,session object. Their methods, as well as their usefulness, require us to continue to explore. Come on.