multiple javascript for user controls

[Italian Pete]

Hi,
I have a usercontrol which includes a small piece of Javascript built up
as a string in <scripttags and put onto a web page when an instance of the
User Control is created. The Javascript does some client side checking of
User Input.

If I use multiple instances of the same user control on a page, the same
block of Javascript is repeatedly written to the page (once for each instance
of the user control). Although the user controls still work, it creates a
bigger page to download from the server.

Is ther any way of just writing the Javascript the once to the page? or is
there a better way of getting the Javascript written. (I wanted to keep the
Javascript integral to the user control so that it was independent).

Many thanks,

Pete

[Brennan Stehling]

Hi Italian Pete,

You can use an ASP.NET feature to register the scripts. You uniquely
identify them with keys.

Here is some example code.

string key = "script1";
string url = "scripts/script1.js";

if (!Page.ClientSc ript.IsClientSc riptIncludeRegi stered(key))
{
Page.ClientScri pt.RegisterClie ntScriptInclude (key, url);
}

That will ensure it is only included once per key.

You can also build an assembly which embeds the scripts you are using
to make it easy to deploy them with your website.

I created an assembly with a control to manage the scripts here...

http://svn.offwhite.net/svn/SmallSha...Scripts/trunk/

You can browse the code to see what I did there. It is a Subversion
repository so you could use TortoiseSVN to pull down the whole project
and work use it.

Brennan Stehling
http://brennan.offwhite.net/blog/

Italian Pete wrote:

Hi,
I have a usercontrol which includes a small piece of Javascript built up
as a string in <scripttags and put onto a web page when an instance of the
User Control is created. The Javascript does some client side checking of
User Input.

If I use multiple instances of the same user control on a page, the same
block of Javascript is repeatedly written to the page (once for each instance
of the user control). Although the user controls still work, it creates a
bigger page to download from the server.

Is ther any way of just writing the Javascript the once to the page? or is
there a better way of getting the Javascript written. (I wanted to keep the
Javascript integral to the user control so that it was independent).

Many thanks,

Pete