.Net web controls can be very powerful and can quickly provide good, professional user experience. But there are tradeoffs:
- You have less control ultimately over your markup
- You have to learn the quirks and limitations of various controls
- Before ASP.Net 4.0, it was sometime tricky to have your control-markup work with javascript (and javascript libraries such as JQuery) and CSS, because when rendered they sent to the client some crazy html.
In short, .Net web controls are not the best strategy for every situation, although in Asp.Net 4.0 they are less troublesome. In 4.0 you can make the mark-up they send to the client more predictable, including more control over the id attribute.
And of course there is the other option in ASP.Net: the MVC framework. Although WebForm strategies now work better with JQuery, MVC is fundamentally more of a hands on approach to your markup, which works fantastic with a JQuery heavy strategy. For this reason, you'll see JQuery more in MVC apps than in web forms applications.
MooTools, Prototype and others are also more effective than they were before in .Net, but JQuery is arguably best in .Net because:
- It has been given the microsoft blessing, ensuring there won't be any fundamental compatibility problems.
- Included in MVC projects by default, MVC (and traditional WebForms to a lesser extent) will increasingly be developed with using JQuery in mind.
- Because of the two above, there is a snowballing effect: when looking for guidance and examples online, it easy very very easy to find helpful examples of JQuery being used with .Net. It's difficult to find examples of other javascript libraries being used with .Net.
We should all use our strengths. If you've got JQuery expertise, that expertise will translate very well to .Net, especially if you're using MVC or the newer WebForms. And besides, JQuery rocks!