In this
tutorial, ASP .NET programming is explained using an example "Student Database"
Web Forms is an ASP .NET feature that you
can use to create the user interface for your Web applications. Web Forms pages
offer you a powerful and straightforward programming model that uses familiar
rapid application development (RAD) techniques to build sophisticated
Web-enabled user interfaces.
You can use Web Forms pages to create programmable Web pages that serve as
the user interface for your Web application. A Web Forms page presents
information to the user in any browser or client device and implements
application logic using server-side code. Web Forms page output may contain
almost any HTTP-capable language, including HTML, XML, WML and ECMAScript (JScript,
JavaScript).
In Web Forms pages, the user interface programming is divided into two
distinct pieces: the visual component and the logic. The visual element is
referred to as the Web Forms page. The page consists of a file containing
static HTML or ASP .NET server controls or both simultaneously.
The logic for the Web Forms page consists of code that you create to interact
with the form. The programming logic resides in a separate file from the user
interface file. This file is referred to as the "code-behind" file and
has an ".aspx.cs" or ".aspx.vb" extension. The logic written
in the code-behind file can be written in Visual C# or Visual Basic.
The namespaces used in the .NET Framework about ASP .NET Web applications are
| System.Web |
This namespace includes classes for managing
HTTP output to the client (HttpResponse) and reading HTTP requests
(HttpRequest). |
| System.Web.UI |
It contains classes for creating Web Form
pages, including the Page class and other standard classes used to
create Web user interfaces. |
|
System.Web.UI.HtmlControls
|
It contains classes for HTML-specific
controls that can be added to Web Forms to create Web user interfaces. |
|
System.Web.UI.WebControls
|
It contains classes for creating ASP.NET Web
sever controls. When added to a Web Form, these controls render
browser-specific HTML and script to create a device-independent Web user
interface. |
|
System.Web.Services
|
It contains classes that enable you to build
and use XML Web services, which are programmable entities residing on a
Web server and exposed via standard Internet protocols. |