The web server controls included in ASP.NET provide a more consistent object model and a higher level of abstraction than the HTML controls we have discussed above. The following list shows the main features of the web controls.
The web controls represent most HTML elements.
The web controls extend the set of HTML elements with more high-level controls, such as Calendar or Ad Rotator, than those discussed earlier.
The web controls version of HTML elements typically has a more consistent interface than is available using the other controls.
Web controls may render themselves differently based on client browser capabilities.
Web controls are based on the WebControl class implemented in the System.Web.UI.WebControls namespace. ...