User Control and Server Control

Question

Hi
What are the User Control and Server Controls. What are the difference between the User control and Server Controls.

Senthilkumar · Answer

Hi Arun,
User controls: Web server controls in your ASP.NET Web pages, you can create your own custom, reusable controls using the same techniques you use for creating ASP.NET Web pages. These controls are called user controls.
A user control is a kind of composite control that works much like an ASP.NET Web page—you can add existing Web server controls and markup to a user control, and define properties and methods for the control. You can then embed them in ASP.NET Web pages, where they act as a unit.
Server controls: ASP.NET has solved the "spaghetti-code" problem described above with server controls.
Server controls are tags that are understood by the server.
There are three kinds of server controls:
HTML Server Controls - Traditional HTML tags Web Server Controls - New ASP.NET tags Validation Server Controls - For input validation
Differences: User Controls are controls built with a designer within a web project. They typically are only private to a web application (Although there are ways you can make them available to other projects).
Server Controls are controls that are also known as Web Controls. These are reusable controls that render their html without the aid of a designer, they are created in a seperate assembly from the web application, are appropiate for controls which will be used in many different web applications
Composite Controls are a sub type of Web Controls and are controls which are made up (composed) of other web controls.
A User Control is a partial web page, created in the same way as any other web page in ASP.NET, except that it has an .ASCX extension, and it can be embedded in your other ASPX pages.
User controls are registered with the web page in which they are used, like this:
They are then declared in the web page they are to be used in, like this:
Custom controls are compiled code components that execute on the server, expose the object model, and render markup text, such as HTML or XML, as a normal Web Form or user control does. Custom controls are written in C# or VB, and are derived from the class
System.Web.UI.WebControls.WebControl Server controls are controls that execute on the server and render markup to the browser. User controls and custom controls are both examples of server controls.
http://support.microsoft.com/kb/893667

Satyapriya Nayak · Answer

Hi Arun,
Please refer the below links
http://msdn.microsoft.com/en-us/library/bs302eat%28v=vs.80%29.aspx
http://www.w3schools.com/aspnet/aspnet_controls.asp
http://msdn.microsoft.com/en-us/library/y6wb1a0e.aspx
Thanks

Jignesh Trivedi · Answer

hi
Server controls are tags that are understood by the server.The ASP.NET page framework includes a number of built-in server controls that are designed to provide a more structured programming model for the Web.
The ASP.NET page framework also provides the ability to create user controls and custom controls. User controls and custom controls can enhance and extend existing controls to build a much richer user interface.
The HTML server controls are Hypertext Markup Language (HTML) elements that include a runat=server attribute. The HTML server controls have the same HTML output and the same properties as their corresponding HTML tags.
A user control is a kind of composite control that works much like an ASP.NET Web page—you can add existing Web server controls and markup to a user control, and define properties and methods for the control.
hope this help.