asp basic syntax rules

8/12/2019 ASP Basic Syntax Rules

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ASP Basic Syntax Rules

Write Output to a Browser

An ASP file normally contains HTML tags, just like an HTML file. However, an ASP file

can also contain server scripts, surrounded y t!e delimiters "# and #$.

Server scripts are e%ecuted on t!e server,and can contain any e%pressions, statements,

procedures, or operators valid for t!e scripting language you prefer to use.

The response.write Command

T!e response.write command is used to write output to a rowser. T!e following e%ample

sends t!e te%t &Hello 'orld& to t!e rowser(

"!tml$

"ody$

"#response.write)&Hello 'orld*&+

#$

"ody$

"!tml$

T!ere is also a s!ort!and met!od for t!e response.write command. T!e following

e%ample also sends t!e te%t &Hello 'orld& to t!e rowser(

"!tml$"ody$

"#

-&Hello 'orld*&

#$"ody$

"!tml$

Using BScript in ASP

ou can use several scripting languages in ASP. However, t!e default scripting language

is /0Script(

"!tml$


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"ody$

"#

response.write)&Hello 'orld*&+#$

"ody$

"!tml$

T!e e%ample aove writes &Hello 'orld*& into t!e ody of t!e document.

Using !a"aScript in ASP

To set 1avaScript as t!e default scripting language for a particular page you must insert a

language specification at t!e top of t!e page(

"#2 language-&javascript$"!tml$

"ody$

"#3esponse.'rite)&Hello 'orld*&+

#$

"ody$"!tml$

#ote$1avaScript is case sensitive* ou will !ave to write your ASP code wit! uppercase

letters and lowercase letters w!en t!e language re4uires it.

Other Scripting %anguages

ASP is s!ipped wit! /0Script and 1Script )Microsoft5s implementation of 1avaScript+. 6f

you want to script in anot!er language, like P73L, 3788, or Pyt!on, you will !ave to

install script engines for t!em.

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i (h

ASP Procedures

6nsert t!e "#2 language-&language& #$ line aove t!e "!tml$ tag to write t!e

procedurefunction in anot!er scripting language(

&xample

"#2 language-&javascript& #$

"!tml$"!ead$

"#

function jsproc)num9,num:+;3esponse.'rite)num9,?+#$"p$

"ody$

"!tml$

'i((erences Between BScript and !a"aScript

'!en calling a /0Script or a 1avaScript procedure from an ASP file written in /0Script,you can use t!e &call& keyword followed y t!e procedure name. 6f a procedure re4uires


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parameters, t!e parameter list must e enclosed in parent!eses w!en using t!e &call&

keyword. 6f you omit t!e &call& keyword, t!e parameter list must not e enclosed in

parent!eses. 6f t!e procedure !as no parameters, t!e parent!eses are optional.

'!en calling a 1avaScript or a /0Script procedure from an ASP file written in

1avaScript, always use parent!eses after t!e procedure name.

ASP )orms and User *nput

T!e 3e4uest.@ueryString and 3e4uest.orm commands are used to retrieve user input

from forms.

A form wit! met!od-&get&

How to interact wit! t!e user, wit! t!e 3e4uest.@ueryString command.

A form wit! met!od-&post&

How to interact wit! t!e user, wit! t!e 3e4uest.orm command.

A form wit! radio uttons

How to interact wit! t!e user, t!roug! radio uttons, wit! t!e 3e4uest.orm command.

User *nput

T!e 3e4uest oject can e used to retrieve user information from forms.

&xample +T,% (orm

"form met!od-&get& action-&simpleform.asp&$

irst Bame( "input type-&te%t& name-&fname& $"r $Last Bame( "input type-&te%t& name-&lname& $"r $"r $

"input type-&sumit& value-&Sumit& $

"form$

Cser input can e retrieved wit! t!e 3e4uest.@ueryString or 3e4uest.orm command.
http://www.w3schools.com/asp/showasp.asp?filename=demo_reqqueryhttp://www.w3schools.com/asp/showasp.asp?filename=demo_simpleformhttp://www.w3schools.com/asp/showasp.asp?filename=demo_radiobhttp://www.w3schools.com/asp/showasp.asp?filename=demo_reqqueryhttp://www.w3schools.com/asp/showasp.asp?filename=demo_simpleformhttp://www.w3schools.com/asp/showasp.asp?filename=demo_radiob


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Re-uest.ueryString

T!e 3e4uest.@ueryString command is used to collect values in a form wit!

met!od-&get&.

6nformation sent from a form wit! t!e D7T met!od is visile to everyone )it will edisplayed in t!e rowser5s address ar+ and !as limits on t!e amount of information to

send.

6f a user typed &0ill& and &Dates& in t!e HTML form aove, t!e C3L sent to t!e serverwould look like t!is(

!ttp(www.w>sc!ools.comsimpleform.aspEfname-0illFlname-Dates

Assume t!at &simpleform.asp& contains t!e following ASP script(

"ody$'elcome"#

response.write)re4uest.4uerystring)&fname&++

response.write)& & F re4uest.4uerystring)&lname&++#$

"ody$

T!e rowser will display t!e following in t!e ody of t!e document(

'elcome 0ill Dates

Re-uest.)orm

T!e 3e4uest.orm command is used to collect values in a form wit! met!od-&post&.

6nformation sent from a form wit! t!e PGST met!od is invisile to ot!ers and !as nolimits on t!e amount of information to send.

6f a user typed &0ill& and &Dates& in t!e HTML form aove, t!e C3L sent to t!e serverwould look like t!is(

!ttp(www.w>sc!ools.comsimpleform.asp

Assume t!at &simpleform.asp& contains t!e following ASP script(

"ody$


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'elcome

"#

response.write)re4uest.form)&fname&++response.write)& & F re4uest.form)&lname&++

#$

"ody$

T!e rowser will display t!e following in t!e ody of t!e document(

'elcome 0ill Dates

7%ample for ASP

Test.!tml

?our name:

test).asp


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7%ample :

Test:.!tml

?our name:

Test:.asp


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)orm alidation

Cser input s!ould e validated on t!e rowser w!enever possile )y client scripts+.

0rowser validation is faster and reduces t!e server load.

ou s!ould consider server validation if t!e user input will e inserted into a dataase. A

good way to validate a form on t!e server is to post t!e form to itself, instead of jumping

to a different page. T!e user will t!en get t!e error messages on t!e same page as t!eform. T!is makes it easier to discover t!e error.

A orm wit! 6nformation

3irst name:

Fast name:

*he inormation recei+ed rom the orm abo+e was:

9esponse.rite("*he name propertyGs count is: " 9esponse.rite(9eAuest.3orm("name".Hount

9esponse.rite("

" 9esponse.rite("3irst name=" & 9eAuest.3orm("name"()

9esponse.rite("

"9esponse.rite("Fast name=" & 9eAuest.3orm("name"(,

9esponse.rite(""

'nd i%>


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A orm wit! 3adiouttons

Ilease select your a+orite car:

Jol+o

/aab

2M

end i%>

A orm wit! !ecko%

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