I am learning Joomla 1.5 now. The best way to learn it is to use it. So, I am re-building my website www.michaellleung.info in Joomla 1.5

http://wordpress.org/development/2008/11/wordpress-265/

Wordpress 2.7 finial version has not released yet. But 2.6.5 has come

I found Joomla 1.5 does not allow you to add custom html form.  I have tried sourcer and blank module. The blank module can create module box with custom html form at top of the page. But it can allow me to add the custom html form into an article. Anyway, that is simple and good, worth to try:

http://extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,3668/Itemid,35/

I have nearly reaching the sucessful point. I went to configuration.php and changed

var $editor = 'none'; The form is created, but action attribute is cut out.

Finally, I put all code into a html file and upload to the server. A menu wrapper is created to grab the URL. That is a kind of work around.

I like to use regular expression validation. That is simple.
You only need to use:

Code

For the numeric value validation:

Code

I faced a number of error for parsing a string into int. In most of cases, there is a validation missing.

Code

Code

Try-catch is an expensive operation!!!!!!!!

Secondly, I like to use TryParse even in the case, the progam can tolrate invalid value. TryParse can allow the logic to continue execution. I hate some things like stack track on the screen.