What is Dependency Injection?

[Anonieko]

Pigsaw said...
"You don't want to hard code dependencies into your classes, because
then you can't test them without relying on the dependent classes. So
you "inject" those dependencies simply by setting them as properties -
possibly in the constructor, possibly with setter methods. And it
becomes all the easier if you have a little container which manages
how to configure those dependencies (properties) before they're
injected (set). "

Any shorter one?

[nospam]

Dependency injection is creating a wrapper around classes that your class
depends on.

You can than build stand-alone test cases that no longer "depend" on other
classes.
"Anonieko" <an******@hotmail.comwrote in message
news:11**********************@t8g2000prg.googlegro ups.com...

Pigsaw said...
"You don't want to hard code dependencies into your classes, because
then you can't test them without relying on the dependent classes. So
you "inject" those dependencies simply by setting them as properties -
possibly in the constructor, possibly with setter methods. And it
becomes all the easier if you have a little container which manages
how to configure those dependencies (properties) before they're
injected (set). "

Any shorter one?

[Michael Nemtsev, MVP]

Hello Anonieko,

read there http://www.martinfowler.com/articles/injection.html
---
WBR,
Michael Nemtsev [.NET/C# MVP] :: blog: http://spaces.live.com/laflour

"The greatest danger for most of us is not that our aim is too high and we
miss it, but that it is too low and we reach it" (c) Michelangelo
APigsaw said...
A>
A"You don't want to hard code dependencies into your classes, because
Athen you can't test them without relying on the dependent classes. So
Ayou "inject" those dependencies simply by setting them as properties
A- possibly in the constructor, possibly with setter methods. And it
Abecomes all the easier if you have a little container which manages
Ahow to configure those dependencies (properties) before they're
Ainjected (set). "
A>
AAny shorter one?
A>