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Pros & Cons of Designing Application using OOA vs. SOA

In many organization, it is asked how would we benefit by taking this particular approach of Designing and Developing Application. It can be a brand new application or porting a legacy code. In most cases organization wants a quick solution to address the immediate need, some may come back later and rework in a phased approach but some just keep moving with quick and dirty solutions until a situation demand for real upgrade or rewrite. [More]

Abstract Factory Design Pattern

It is one of the highly used Creational Pattern from Gang of Four patterns. It provides a way to encapsulate a group of individual factories that have a common theme. In normal usage, the client software creates a concrete implementation of the abstract factory and then uses the generic interfaces to create the concrete objects that are part of the theme. The client does not know (or care) which concrete objects it gets from each of these internal factories since it uses only the generic interfaces of their products. This pattern separates the details of implementation of a set of objects from their general usage. [More]

Types Of Design Patterns

In Software Development, a design pattern is generally used as a reusable solution to a commonly occurring problem within a given context in software design. A design pattern is a template or format for how to solve a problem that can be used in many different situations. These Patterns are design and interaction of objects, as well as providing a communication platform for elegant and reusable solution. [More]

Multi-threaded Parallel Processing

Many times you come across a situation when you have to execute the same logic across different clients or batch. While running them in simplest manner without multi-threading, your records will be sequentially processed means your process will take longer time to finish. So here is an example to implement Multi-threading [More]

Pros and Cons of Data Transfer Objects

Nearly every developer and architect would agree on the following, though relatively loose, definition of the business logic layer (BLL) of a software application: The BLL is the part of the software application that deals with the performance of business-related tasks. Code in the BLL operates on data that attempts to model entities in the problem domain—invoices, customers, orders, and the like. Operations in the BLL attempt to model business processes. [More]

Data Transfer Objects (DTO) - Business Layer

I will be consuming the data which was returned by Data Access Layer in the form of XML, Dataset, DataTable, ArrayList and Custom (Data Transfer) Objects to populating my Business Object, which will be finally consumed by a User Interface and most likely a web page. In this example, I will use only one class, which will perform the CRUD operation on Customer Object by invoking method of Data Access Layer. Since I have added methods in data access layer to return Customer(s) data in form on XML, Dataset, DataTable, ArrayList and Custom (Data Transfer) Object. No matter in which form data is returned from data access layer, the business object will read that object and consume the data to make it ready for business object caller. [More]

Data Transfer Objects (DTO) - Data Access Layer

When you separate your business layer from data access layer in two different assembly, you come across a situation as which data transfer method will best fit you. In this example, I went through various Data Transfer Objects(DTO) which are currently available in .NET such as XML, DataSet, DataTable, ArrayList and Custom Data Transfer Object . One DTO generally maps to one Business Object. Each option has its pros and cons, so depending on project one should choose as what best fits the need. In the following code I have tried to use all the four possibilities. [More]

Freeze Column in GridView

The following example will demonstrate as how to freeze or fix one or more column in a GridView. I have used stylesheet to achieve this result. At present this solution only works in IE 7.0. The data source is a xml file containing product sales result. [More]

Speed Test: Generic List vs. ArrayList

It is very important to evaluate the most efficient way of passing data between layers. Many people recommend using ArrayList, some Generic List. But which one is the most efficient way to use? I thought to perform a speed test between Generic List and ArrayList in VS2005. Some people blindly accept that ArrayList is the fastest way. But is it true? Let’s have a real test by reading and writing hundred thousand records using each type and see the outcome. Knowing the fact that Collection, Data Table and XML is slower than these two but how much? Let’s put them to test too and compare the result. [More]