ASP Programming

ASP stands for Active Server Pages. It is a server side technology which is used to display dynamic content on web pages. For example you could write code that would give your visitors different information, different images or even a totally different page depending on what browser version they are using.

Virtual directories are aliases for directory paths on the server. It allows moving files on the disk between different folders, drives or even servers without changing the structure of web pages. It avoids typing an extremely long URL each time to access an ASP page.

VBScript : REM & ‘(apostrophe)

JavaScript : // (single line comment)

/* starting multi line comments

(Multi-line comments)

ending multi line comments */

Variant is the default data type in VBScript, which can store a value of any type.

Variable is a memory location through which the actual values are stored/retrieved. Its value can be changed.

Maximum size of an array in ASP is up to 60 dimensions.

Querystring collection stores any values that are provided in the URL. This can be generated by three methods:

By clicking on an anchor tag

By sending a form to the server by the GET method

Through user-typed HTTP address

default Scripting Language of ASP is VBScript

Writing codes within the Tag

The two attributes are ACTION and METHOD

The ACTION gives the name of the ASP file that should be opened next by which this file can access the information given in the form The METHOD determines which of the two ways (POST or GET) the browser can send the information to the server

The Session Object has only one method, which is Abandon. It destroys all the objects stored in a Session Object and releases the server resources they occupied.

The ServerVariables collection in ASP holds the entire HTTP headers and also additional items of information about the server.

The main difference is that the Querystring collection in ASP gets appended to a URL.

The Form collection holds the values of the form elements submitted with the POST method. This is the only way to generate a Form collection.

The Objects in ASP are Dictionary object, the FileSystemObject object, TextStream object.

The browser makes a HTTP request; the server gives a HTTP response to the browser and the browser converts into a HTML page.

The browser makes a HTTP request; the server does the processing and gives a HTML response to the browser.

Specify yourself

Application Object in ASP shares information among users of an application. Gives a notification when an application starts or ends.

Scripts executed only by the browser without contacting the server is called client-side script. It is browser dependent. The scripting code is visible to the user and hence not secure. Scripts executed by the web server and processed by the server is called server-side script.