How many design patterns are there in asp net

In this situation, there are two types of objects required, a packaging object and a delivery documentation object. We could use two factories to generate these related objects.

The one factory will be responsible for creating packaging and other delivery objects for standard parcels. The second will be responsible for creating packaging and delivery objects for delicate parcels.

Class Client. The example code above creates two client objects, each passing to a different type of factory constructor. Types of generated objects are accessed through the client's properties. Note While studying abstract factory patterns, one question is, what are concrete classes? So I Googled that and the following is the answer to my question. A concrete class is nothing but a normal class that has all basic class features, like variables, methods, constructors, and so on.

We can create an instance of the class in other classes. The Singleton design pattern is one of the simplest design patterns. This pattern ensures that the class has only one instance and provides a global point of access to it. The pattern ensures that only one object of a specific class is ever created. All further references to objects of the singleton class refer to the same underlying instance.

There are situations in a project where we want only one instance of the object to be created and shared among the clients. No client can create an instance from outside. It is more appropriate than creating a global variable since this may be copied and leads to multiple access points. In the singleton patterns, the UML diagram above the "GetInstace" method should be declared as static. This method returns a single instance held in a private "instance" variable.

In the singleton pattern, all the methods and instances are defined as static. The static keyword ensures that only one instance of the object is created and you can call methods of the class without creating an object. The constructor of a class is marked as private. This prevents any external classes from creating new instances. The class is also sealed to prevent inheritance, which could lead to subclassing that breaks the singleton rules.

The following code shows the basic template code of the singleton design pattern implemented using C. The code above shows the "lockThis" object and the use of locking within the "GetInstance" method.

This reference provides source code for each of the 23 GoF patterns. To give you a head start, the C source code for each pattern is provided in 2 forms: structural and real-world. Structural code uses type names as defined in the pattern definition and UML diagrams. Real-world code provides real-world programming situations where you may use these patterns. A third form,. NET optimized , demonstrates design patterns that fully exploit built-in.

NET features, such as, generics, delegates, reflection, and more. We should not "drown" and do not hurry to judge when we only know in theory. There is a big gap between theory and reality. Amateur journalists on technology should not judge hurriedly because it will kill the very modern technology. In term of WebForms, many people thought that it has ViewState, DrivenEvents so it is difficult to control, whereas other few people recognized that Web Forms supports template programming technology.

It is very simple, modern and flexible technology. We even do not need use ViewState, DrivenEvent. NET WebForms - The very modern design pattern model is gradually oblivion WebForms is a very modern, simple, clear, flexible, decouple design pattern model. It was one of Microsoft's wonderful technologies, but unluckily it has been gradually oblivion recently.

Why has it been gradually oblivion? So where is the modern, professional and useful in WebForms? Lets you fit more objects into the available amount of RAM by sharing common parts of state between multiple objects instead of keeping all of the data in each object. Lets you provide a substitute or placeholder for another object. A proxy controls access to the original object, allowing you to perform something either before or after the request gets through to the original object.

Lets you pass requests along a chain of handlers. Upon receiving a request, each handler decides either to process the request or to pass it to the next handler in the chain. Turns a request into a stand-alone object that contains all information about the request.

This transformation lets you pass requests as a method arguments, delay or queue a request's execution, and support undoable operations. Lets you traverse elements of a collection without exposing its underlying representation list, stack, tree, etc.