Variables are used to store information.
If you declare a variable outside of a subroutine, the variable can be changed by any script in the ASP file. If you declare a variable in a subroutine, it is created and revoked each time the subroutine executes.
Instance:
declaring variables
The following are the referenced contents: <body> <% Dim name Name= "Donald Duck" Response.Write ("My Name is:" & name) %> </body> |
Variables are used to store information. This example shows how to declare a variable, assign a value to a variable, and use that variable in a program
Declaring an array
The following are the referenced contents: <body> <% Dim fname (5), I fname (0) = "George" fname (1) = "John" fname (2) = "Thomas" fname (3) = "James" fname (4) = "Adrew" fname (5) = "Martin" For i = 0 to 5 Response.Write (FName (i) & "<br/>") %> </body> |
Arrays are used to store a series of related data items. This example shows how to declare an array that stores names.
Looping to generate HTML headers
The following are the referenced contents: <body> <% Dim i For I=1 to 6 Response.Write (" %> </body> |
How to loop through 6 different HTML headings.
Using Vbscript to make a time based greeting
The following are the referenced contents: <body> <% Dim h H=hour (now ()) Response.Write ("<p>" & Now ()) Response.Write ("(Beijing time) </p>") If H<12 Then Response.Write ("Good morning!") Response.Write ("Good day!") %> </body> |
This example displays a different message to the user based on the server time.
Using JavaScript to make a time based greeting
The following are the referenced contents: <%@ language= "JavaScript"%> <body> <% var d=new Date () var h=d.gethours () Response.Write ("<p>") Response.Write (D + "(Beijing time)") Response.Write ("</p>") if (h<12) { { </body> |
This example is the same as the grammar.
The lifetime of a variable
Variables declared outside of a subroutine can be accessed and modified by any script in the ASP file.
A variable declared in a subroutine is created and revoked only when the subroutine is executed every time. Scripts outside of a subroutine cannot access and modify the variable.
To declare a variable for use by multiple ASP files, declare the variable as a session variable or a application variable. (www.3lian.com)
Session variable
The session variable is used to store information for a single user and is valid for all pages in an application. The typical data stored in the session is the name, ID, or parameter.
Application variable
The application variable is also valid for all pages in an application. The application variable is used to store information for all users in a particular application.
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