Why should a web architecture be loosely coupled?

asp.net asp.net-mvc architecture loose-coupling
Rookian picture Rookian · May 19, 2010 · Viewed 13.4k times · Source

When I look at ASP.NET MVC projects I everytime see loose coupled architecture.

For what do I need a loose coupling in a web architecture (if I do not make unit tests)?

What are advantages and disadvantages of this?

What is the main reason to decouple layers/classes?

What if I do not want to change my DAL for example? I mean when shall I change my whole DAL?! So I could couple my DAL to the UI. What is bad with this?

Answer

Justin Niessner picture Justin Niessner · May 19, 2010

Loose Coupling allows you to make changes in one area of the application without affecting the others. Theoretically it allows you to do things like change your Data Access Layer without rebuilding your Business or UI Layers.

It definitely makes your applications more flexible, more adept at change, and easier to maintain (since you don't have to worry about a change in one area of the application breaking another).

Related questions

Advantage of creating a generic repository vs. specific repository for each object?

We are developing an ASP.NET MVC application, and are now building the repository/service classes. I'm wondering if there are any major advantages to creating a generic IRepository interface that all repositories implement, vs. each Repository having its own …

Read More
A potentially dangerous Request.Form value was detected from the client

Every time a user posts something containing < or > in a page in my web application, I get this exception thrown. I don't want to go into the discussion about the smartness of throwing an exception or crashing an …

Read More
Can I set an unlimited length for maxJsonLength in web.config?

I am using the autocomplete feature of jQuery. When I try to retrieve the list of more then 17000 records (each won't have more than 10 char length), it's exceeding the length and throws the error: Exception information: Exception type: InvalidOperationException Exception …

Read More