10 November, 2014

Patterns in ASP.Net Development That Developers Should Know

As an open source web development framework, ASP.Net is used widely for creating a wide range of websites, web applications and web services. The server side web application development framework was originally designed by Microsoft as the successor to Active Server Pages (ASP) technology. But Microsoft is updating and improving ASP.Net consistently to convert it into a modular and modern web development framework. Many reports have highlighted how Microsoft is emphasizing more on design patterns. So it becomes essential for web developers to know the formal and informal patterns in ASP.Net.

Overview of Some Widely Used Design Patterns in ASP.Net

The Model-View-Controller (MVC) Pattern
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As the name indicates, the design patterns allow programmers to keep the model, view and controller separate. The model objects implement the application’s business logic, whereas view includes the components required to display its user interface. At the same time, controller handles user interaction, and responds to the use input. When the business logic and presentation is separated, it becomes easier to maintain and update the code. ASP.Net MVC pattern is also used widely as an alternative for ASP.NET Web Forms pattern.

Provider and Adapter Patterns
Often developers are required to make several compatible classes to work together. The Provider and Adapter patterns make it easier for programmers to combine different incompatible classes seamlessly. These design patterns make incompatible classes work together by converting the interface of a single class into an interface expected by other classes. The patterns can also be used by developers to keep the components separate, while allowing their behavior to change according to the usage and requirements of the internet application.

The Repository Pattern
The repository pattern in ASP.Net enables programmers to store entities virtually as XML, database or similar persistent mediums. For instance, programmers can use the design pattern to store the Customer and Order as strongly typed objects in database tables, instead of using data rows or data sets. So it becomes easier for them to hide the data storage implementation from application code. Further, they have option to use a common set of methods to make the application secure, regardless of the storage format or mechanism.

The Singleton Pattern
The design pattern can be used by ASP.Net developers to create class that can have only one single instance. The singleton pattern can be used for read-only data and static methods as they do not rely on instance data. So instead of creating an instance of the class, the design pattern can be used to refer to an existing instance of the class through the static method. Along with creating the instance of the class, singleton can further populate it with relevant data, and return the instance. So it can return the instance each time the static method is called.

The Service Agent, Proxy, and Broker Patterns
These design patterns are used to allow the application access remote services without the client knowing how the services work. The service defines its interface by exposing a contract. For instance, the contract for a Web Service is defined in the Web Service Description Language (WSDL) document. The contract can also be used by the client-side proxy or gateway interface to generate a properly formatted request. As the request is suitably formatted, it can pass through the service interface, and the gateway interface can respond properly to the service. With more web applications using remote services, the service agent, proxy and broker patterns can be used to optimize the performance of the ASP.Net application.

On the whole, a programmer can use several design patterns while creating ASP.Net applications. The formal design patterns are usually documented adequately. But many programmers use the informal design patterns on a regular basis while writing code. So it is always important for web programmers to understand the design patterns in ASP.Net, and pick the right ones according to their project’s requirements.

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