Using JavaScript Effectively in ASP.NET 2.0 - Part 1
page 2 of 6
by Satheesh Babu
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ClientScriptManager Class

We normally add JavaScript functions to our webpage using <Script> tag. There are situations where we need to add the scripts dynamically from the codebehind class. In .NET Framework 1.x version, there is no class that helps us to handle this situation effectively. This drawback was addressed in .NET Framework 2.0 by introducing a new class called ClientScriptManager.  This class can be used to manage and add script blocks to the page from codebehind class.

Things we should know about ClientScriptManager Class

·         ClientScript property of the Page object will give us an instance of ClientScriptManager object. We can add the scripts dynamically through this instance which will be then be injected in the HTML output.

·         This class uniquely identifies scripts by a key String and a Type. Scripts with the same key and type are considered duplicates and similar scripts are then avoided. This will avoid the confusion caused when we are adding scripts from user controls. For example, the method IsClientScriptBlockRegistered() can be used for checking duplicate scripts registered for RegisterClientScriptBlock() method.

ClientScriptManager class has a set of useful methods which we can use to inject the JavaScript functions in the HTML output. We can choose to use these methods to accomplish our requirements depending on the situation.

This part of the article will discuss the usages of 3 different methods.

1.    RegisterClientScriptBlock() Method

2.    RegisterStartupScript() Method

3.    RegisterOnSubmitStatement() Method

View Entire Article

User Comments

Title: Easy to udersatnd   
Name: Raj kumar
Date: 2011-01-18 5:58:27 AM
This the example that how we can add additionl attribute on any asp:.. control .
First we register ClientSide Script at the time of page_load then it works.
code is all-ready given there.
ok by
Title: Javascript   
Name: mohamed
Date: 2010-11-24 8:11:08 AM
There is a problem in the stress at which any request for the page, there will be an invitation to the confirmation message that you need to be placed in the confirmation message within the event of a button, instead of the event page, although the occurrence of this call is also a confirmation message. What is the solution
Title: Javascript   
Name: mohamed
Date: 2010-11-24 7:58:03 AM
There is a problem in the stress at which any request for the page will be a caller confirmation message
Title: Javascript   
Name: Praveen
Date: 2010-03-10 1:59:54 AM
Simple examples to understand the concepts.Excellent
Title: JavaScript on form load   
Name: yc
Date: 2009-05-11 4:54:00 AM
Thanks sir,
JavaScript on form load.
That's what I was googling for 2 days.
Title: Listing6 problem   
Name: O M
Date: 2009-04-23 6:02:23 PM
Looks like Listing6 should be for "RegisterStartupScript Output" instead it is same as Listing1.
Title: Web Developer   
Name: Dhananjay
Date: 2009-04-13 7:56:31 AM
This is very good article.
but I have question regarding - RegisterOnSubmitStatement.
On my page there are two buttons first one is Show - to display data and another is Delete - to delete data.

In this condition using your code How can I show confirm box on only on delete button.
Title: Web Developer   
Name: Shilpa
Date: 2009-04-07 6:09:04 AM
Javascript functionality explained in such a simple technical terms. Its wonderful.
Satish Babu, keep it up.
Title: web developer   
Name: xiaohong
Date: 2009-04-06 2:56:36 PM
nice organized article, thanks!
Title: Dan   
Name: Dan
Date: 2009-04-01 10:00:10 AM
I didn't know about the onsubmitscript. Thanks's
Title: Nice article   
Name: Anas
Date: 2009-04-01 3:42:09 AM
Nice article thanks
i like it
Title: Part 2   
Name: Joe
Date: 2009-03-25 12:20:57 PM
You can read the 2nd part here,
Title: Can you provide Part 2 Article for the same   
Name: Sree
Date: 2009-01-08 7:14:12 AM
Nice article ragarding clientscriptmanager class.
It would be great if you provide Part 2 continuation link for the same.
Title: Good Article   
Name: greeny
Date: 2008-12-20 2:52:31 AM

good to see easily understandable article.
Title: Great Article   
Name: J
Date: 2008-12-09 5:46:12 AM
This was the first article I read on RegisterStartupScript.
Very easy to understand article with nice examples.
Thanks a lot for shairing this
Title: Programmer   
Name: Tonci Korsano
Date: 2008-09-30 2:38:46 PM

I think this is a good article. RegisterOnSubmitStatement() Method was explained in a simple way. I might have to use this method. However, I have read that in these methods it is more efficient to use typeOf(this) or typeOf(Page) instead of this.getType() or Page.getType()

Title: RE: how to execute onsumit in between the server code   
Name: Mikalai
Date: 2008-09-26 10:51:03 AM
To Nonu:
do not be confused with server and client side code. alert could be only displayed when server side code is finished and result html is sent to the client.
Title: how to execute onsumit in between the server code   
Name: Nonu
Date: 2008-09-25 11:06:28 AM
Your article is helped me a lot to understand clientscript class.
but i want to execute a alert in between the server side code.
Title: Good Article   
Name: Joe
Date: 2008-09-17 11:47:12 PM
Your article is really good! It is really useful to people like me!
Thanks again!
Title: Mr.   
Name: kmanral
Date: 2008-09-17 2:52:58 PM
only useful part of article is the link to MSDN. oops...

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