when should use of document.getElementById in aspn.net

Question

0.00/5 (No votes)

See more:

hi to all
when we should be use of document.getElementById
for asp.net control or html control? (or both of them and why?)
thanks for any answer

Posted 17-Apr-13 21:01pm

mhd.sbt

Updated 17-Apr-13 21:02pm

v2

Add a Solution

Comments

Prasad Khandekar 18-Apr-13 3:09am

document.getElementById is a HTML DOM api for JavaScript. You use it in javascript to find a particluar element by value of it's it's id attribute. Asp.Net control finally gets rendered as an HTML element. You can use this API for both ASP.NET Web Control and Html Control.

mhd.sbt 18-Apr-13 10:17am

ok thank you for reply
i have an span tag for example with id=span1 i want to set display =none .
witch of two below code you preferred?
1-
var span=document.getElementById('span1');
span.style.cssText="Display:none";
or
2-
span1.style.cssText="Display:none";
and why?

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

*Karthik Harve* · Answer 1 · 2013-04-17T21:16:00

Solution 1

Hi,
refer the msdn article regarding this function.
getElementById method[^]
HtmlDocument.GetElementById Method [^]

hope it helps.

Posted 17-Apr-13 21:16pm

Karthik Harve

_Amy · Answer 2 · 2013-04-17T21:19:00

Solution 2

You should read the Document Object Model (DOM) Level 3 Core Specification[^].
Refer the links below:

--Amit

Posted 17-Apr-13 21:19pm

_Amy

Sreenivasa Reddy G · Answer 3 · 2013-04-17T21:22:00

hi pal ,

document.getElementById('aspControl or htmlcontrol').value

Here we getting the value of that control
most of the time we are using for validations means form validations

document.form1.getElementById('aspControl or htmlcontrol').value
we can like this also for finding value(text) of a control we are using...

document.getElementById --for id
document.getElementByName ---for name
document.getElementByTag ...etc

we have like this methods in javascript library