ASP.NET User Control

ASP.NET User Control Introduction

ASP.NET supports creating reusable components through the creation of User Controls. A User Control follows the same structure as a Web Form, except that such controls are derived from the System.Web.UI.UserControl class, and are stored in ASCX files. Like ASPX files, an ASCX file contains static HTML or XHTML markup, as well as markup defining web control and other User Controls. The code-behind model can be used.

User can also build Custom Controls for Asp.Net application. Where controls are in compiled DLL file. And by using Register directive user can use control from DLL.

User controls are containers into which you can put markup and Web server controls. You can then treat the user control as a unit and define properties and methods for it.

An ASP.NET Web user control is similar to a complete ASP.NET Web page (.aspx file), with both a user interface page and code. You create the user control in much the same way you create an ASP.NET page and then add the markup and child controls that you need. A user control can include code to manipulate its contents like a page can, including performing tasks such as data binding.

A user controls differs from an ASP.NET Web page in these ways:

• The file name extension for the user control is .ascx.

• Instead of an @ Page directive, the user control contains an @ Control directive that defines configuration and other properties.

• User controls cannot run as stand-alone files. Instead, you must add them to ASP.NET pages, as you would any control.

• The user control does not have html, body, or form elements in it. These elements must be in the hosting page.

Benefit of Using User Control in ASP.NET
There are many benefits using user control in ASP.NET :

• The drag-and-drop design interface supported by user control is the simplest and fastest way to create your controls user interface.
• You can put any amount of server-side code behind a web user control, so you can have your Web Part perform any server-side processing that you want.
• You can give your Web Part custom web properties, methods, and evens, increasing flexibility of the Web Part.
• You can include client-side code and HTML in your Web Part along with ASP.NET WebForm controls and server-side code just by switching to HTML view.
• In addition to being more powerful than pure HTML, ASP.NET WebForm controls generate their HTML at run time and can configure the HTML they generate to match the device that is requesting time
  

Where can you find ASP.NET hosting with user control ?
Now, Webhostforasp.net support for user control in asp.net. Webhostforasp.net is one of the leading US hosting provider specialized with asp.net hosting and windows hosting.