what is a framework?

[HowTo]

what is .net?Its a framework.But what does the term "Framework" means

[gep13]

To me, Framework basically means the building blocks for creating your application.

The .Net Framework contains a huge number of classes which on their own do discrete tasks, i.e. open a file, save a file, make an HttpWebRequest etc. You can then take all of the elements within this framework orchestrate them to do something a bit more meaningful, like create a Media Player, or a Word Processor.

More information here:

http://en.wikipedia.org/wiki/.NET_Framework

Gary

[jmcilhinney]

A development framework is basically a set of tools that you can use to simplify development. Instead of interacting with the the system at a low level, the framework handles interaction with the system and then you interact with the framework. You can perform a single task against the framework and it might do a number of tasks against the system that would be much more complex for you to code yourself. A framework won't necessarily cover everything, so there will be times that your code must pass through the holes it contains and interact with the system directly.

Frameworks might be layered, e.g. the ASP.NET MVC Framework is a a way to build web apps simply against the .NET Framework. You interact with the MVC Framework, which interacts with the .NET Framework, which interacts with the system.

It's also important to remember that there is far more to the .NET Framework than just its base class library. That is only one aspect of it.

[HowTo]

This is what i learnt from a google search that an ASP.NET MVC Framework is a web application framework that implements the model-view-controller pattern.

model is equivalent to a database,view is equivalent to the user interface and controller is equivalent to the server.

someone please explain me these three terms of MVC clearly.........please help

[jmcilhinney]

The database itself is not really the model. It's kind of a separate layer of its own. The model is your app's representation of the data. That data may come from a database or it may not. If you generate a typed DataSet in your project from a database, the typed DataSet is the model. You might also use LINQ to SQL, the Entity Framework, some other ORM tool or even hand code your own entity classes to create your model.

The view is what the user sees. The view should contain the UI itself and also probably any logic relating specifically to the UI, e.g. formatting, and that's all.

The controller is basically the business logic of your app. It controls how the model gets to the view. Sometimes the controller will actually pass instances of model classes to the view and others times you will need to craft what's known as a "view model", i.e. a custom chunk of data created specifically to correspond to a view when the model format doesn't directly match the view format.

In ASP.NET MVC terms, all URLs that the user enters or clicks on in their browser map to an action method in a controller. The controller decides what data is required and gets it from the model. It then creates the appropriate view and passes the data to it. The view will then decide exactly how to display that data. If the user enters or edits data into a form and posts it back to a controller action, the controller will then validate the data if required and, if it passes, send it back to the model to be saved to the original data source.

[HowTo]

What is the meaning of the term "Business logic" ?

[jmcilhinney]

Business logic is basically what your application does. The data is just data. It sits there being data. The UI displays the data and lets the user enter and edit it. Everything else is business logic: how the data gets used, what is valid and what isn't, etc, etc.

[gep13]

An simple example of what might on go within your business logic would be something like the following...

Let's say you store in your database a person's first name and last name. You have fields for this in your database, and these fields are recovered within your data access layer. Now in terms of being usable to the front end, you might need to combine the first and last name, such as:

Gary Park
Park, Gary

Depending on what is required. You are not going to store both of these combinations of the names in the database, as that would be a waste of space. However, in your Business Logic, you might provide properties, or methods, that combine these names for you, on demand, which can then be used within the UI.

Gary

[baja_yu]

Do you know about Wikipedia?

http://en.wikipedia.org/wiki/Software_framework
http://en.wikipedia.org/wiki/Business_logic

[gep13]

Do you know about Wikipedia?

http://en.wikipedia.org/wiki/Software_framework
http://en.wikipedia.org/wiki/Business_logic

It is a great resource!

Gary