Hi,

Lately, I was developing the UI using Silverlight technology, but I’m planning to start develop it using HTML5, CSS3 and JavaScript.

Can you please guide me how to start do it?
for example, I want to develop a UI which manage SQL Server DB (Insert, Update and Delete Data)

Please, need your help.

Regards,

Bader Nadeem

Find some sites that cover HTML5 and CSS3 design and start learning. There are no tutorials like that here. This is an ASP.NET forum.

you need read "learn html 5 in 5 mins" and explorer the structure of bootrap . hope this help you
msdn.microsoft.com/en-us/hh549253.aspx

getbootstrap.com/css/

It should be noted that Silverlight is really more closely related to actual desktop-style applications as opposed to pure HTML web applications. With that being said, its completely possible to create extremely professional / advanced user interfaces purely
with HTML5, CSS and Javascript. This really is going to depend on your current level of comfort with working with these three technologies. If you are unfamiliar with them, it wouldn’t be too tough to invest some time and pick them up.

Learning CSS, HTML and Javascript

While they are quite easy to pick up, they can be difficult to master and get things to look just right without quite a bit of time / effort / experience. If you were interested in learning a bit more about them, there are tons of sites out there that can
introduce you to picking these up. The following are some excellent sites that offer tutorials, walkthroughs and basic "courses" on using CSS, HTML and Javascript : 

• Code Academy - Tutorial on Web Fundamentals (CSS and HTML), Tutorial
  on Javascript, Combining CSS, Javascript and HTML and a course on HTML + CSS + Javascript.
• W3Schools Online Tutorials - HTML Tutorials, CSS Tutorials and Javascript
  Tutorials.
• The 125 Best CSS, HTML and Javascript Tutorials - a variety of tutorials and topics that cover CSS, Javascript and HTML.
• HTMLDog - features guides and tutorials on CSS, Javascript and HTML.

I’ll include a few other resources that come to mind and I would recommend you taking a look at for some additional assistance.

• CSS Basics - An excellent resources specifically for learning more about CSS
• Mozilla’s Guide to Learning CSS
• Learn CSS in 30 Days
• CSS Play
• PluralSight’s Course on CSS - PluralSight obviously is not free, but it is an amazing resource if you are serious about formalized learning within the development
  world. It has courses from experts in nearly every facet of development and very well put-together courses.

The Other Approach : Templates or Components

Another approach that might be worth pursuing might be to search around for some pure HTML "CRUD" templates within ASP.NET. Basically, all you’ll need to do is create very simple AJAX events that can post the appropriate values to certain actions within
your server-side code so that you can save values to your database. You really don’t NEED AJAX to do this, but it’s an extremely common approach that you’ll see in quite a few types of Web Applications.

Another option would be to consider looking into some of the available functionality from high-end component vendors like
Telerik and their Kendo UI components. They are extremely professional in appearance, generally offer extremely responsive support and are very well documented as well. 

very nice answer @Rion.