Page 24 - DCAP312_WEB_TECHNOLOGIES_II

Web Technologies-II

Notes 1.9 ASP.NET Architecture

ASP.NET is based on the architecture of .NET Framework. Visual studio provides a uniform
way to combine the various features of this Architecture.
Figure 1.7: ASP.NET Architecture

Architecture is explained form underside to top in the following discussion.
1. At the bottom of the Architecture is Common Language Runtime. .NET Framework
common language runtime resides on top of the operating system services. The common
language runtime loads and executes code that targets the runtime. This code is therefore
called managed code. The runtime gives you, for example, the ability for cross language
integration.
2. .NET Framework provides a rich set of class libraries. These include base classes, like
networking and Input/Output classes, a data class library for data access, and classes for
use by programming tools, such as debugging services. All of them are brought together
by the Services Framework, which sits on top of the common language runtime.
3. ADO.NET is Microsoft’s ActiveX Data Object (ADO) model for the .NET Framework. ADO.
NET is not simply the migration of the popular ADO model to the managed environment
but a completely new paradigm for data access and manipulation.

ADO.NET is intended specifically for developing web applications. This is evident from
its two major design principles:

1. Disconnected Datasets In ADO.NET, almost all data manipulation is done outside
the context of an open database connection.
2. Effortless Data Exchange with XML Datasets can converse in the universal data format
of the Web, namely XML.
4. The 4th layer of the framework consists of the Windows application model and, in parallel,
the Web application model. The Web application model in the slide presented as ASP.
NET-includes Web Forms and Web Services.

ASP.NET comes with built in Web Forms controls, which are responsible for generating
the user interface. They mirror typical HTML widgets like text boxes or buttons. If these
controls do not fit your needs, you are free to create your own user controls.
Web Services brings you a model to bind different applications over the Internet. This
model is based on existing infrastructure and applications and is therefore standard-based,
simple, and adaptable.

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