Unveil ASP secrets (4)

Application object
    
Author: mi Xiansheng
    
1. Set of Application objects
In the Application, there are two sets of Contents and StaticObject. You can use these two sets to control whether variables and objects are visible in the entire ASP Application.
The Contents set is a set of variables, which are visible to each Session in an ASP Application. These variables are used at the Application level and can be used. contents ("CurrentDiscount") = 1. Since this set is the default set of Application objects, the previous line of code can also be written as follows: application ("CurrentDiscount") = 1.
    
The StaticObject set uses global. created by the asa file, global. the asa file is part of an ASP Application. It provides you with a way to compile the code to run when the ASP Application starts or stops, it also provides the function of compiling code to run at the beginning and end of the Session.
I. Attributes
Although the Application object does not have built-in attributes, we can use the following syntax to set user-defined attributes, also known as collections.
Application ("attribute/set name") = value
We can use the following script to declare and create the attributes of the Application object.
<%
Application ("MyVar") = "Hello"
Set Application ("MyObj") = Server. CreateObject ("MyComponent ")
%>
Once an Application object is assigned a property, it will persist until the WEB server service is disabled to stop the Application. The value stored in the Application object can be read by all users of the Application program. Therefore, the attribute of the Application object is especially suitable for transmitting information between users of the Application program.
    
II. Method
The Application object has two methods, both of which are used to process data written by multiple users in the Application.
1. The Lock method prohibits other customers from modifying the properties of the Application object.