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ASP Tutorial
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ASP Syntax and Structure

ASP (Active Server Pages) is a server-side scripting language primarily used for creating dynamic and interactive web pages. It enables developers to build web applications by embedding ASP code within HTML pages.

Basics of ASP Syntax

ASP code is enclosed within <% %> delimiters. Here’s an overview of its fundamental syntax:

1. Declaration Tags

<%@ Language= "VBScript" %>
<%@ Page Language="VBScript" %>

These tags define the scripting language used in the ASP file. VBScript is commonly employed in ASP.

2. ASP Code Blocks

<% ' ASP code here %>
<%
' Multiple lines of ASP code
' can be written within these tags
%>

ASP code blocks execute server-side logic and can be inserted anywhere within an HTML document.

3. Variables and Data Types

<%
Dim variable_name
variable_name = "Value"
%>

Variables in ASP are declared using Dim and can hold various data types such as strings, integers, and arrays.

ASP Control Structures

4. Conditionals (IF…ELSE)

<%
If condition Then
' Code to execute if condition is true
Else
' Code to execute if condition is false
End If
%>

ASP supports conditional statements for making decisions in code execution.

5. Loops (FOR…NEXT, DO…LOOP)

<%
For i = 1 To 5
' Code block to repeat
Next
%>

Loops enable repetitive execution of code based on specified conditions.

ASP Functions and Procedures

6. Functions

<%
Function functionName(parameter1, parameter2)
' Code logic
End Function
%>

Functions in ASP encapsulate a block of code and can return values.

7. Procedures

<%
Sub ProcedureName(parameter1, parameter2)
' Code logic
End Sub
%>

Procedures are similar to functions but do not return values.

ASP Objects and Components

8. Built-in Objects

<%
Set obj = Server.CreateObject("Class")
obj.MethodName()
%>

ASP provides built-in objects like Request, Response, and Server to interact with the server environment.

9. User-defined Components

<%
Set myComponent = Server.CreateObject("MyNamespace.MyComponent")
myComponent.MethodName()
%>

Developers can create custom components or utilize third-party components for specific functionalities.