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Semantic Code: Migrating From A Chatty Interface To A Simple One With A Data Transfer Object

I’ve worked on several C#/Compact Framework/WinForms projects for handheld devices over the years – most of which have involved a require for users wearing gloves to be able to type on a virtual keyboard. It’s not terribly difficult to implement this...

Published Mon, Mar 03 2010 2:40 PM by derick.bailey

Filed under: Analysis and Design, Principles and Patterns, .NET, C#

Understanding The Application Controller Through Object Messaging Patterns

Earlier in the year, I posted a few times on the Application Controller pattern that I was implementing, including some workflow service related posts, all leading up to the presentation on decoupling workflow from forms that I gave at Austin Code Camp...

Published Tue, Dec 12 2009 10:06 PM by derick.bailey

Filed under: Analysis and Design, Principles and Patterns, .NET, Model-View-Presenter, AppController, Workflow, Messaging

Why ‘Should Attach View To Presenter’ Is An Invalid Unit Test / Observation.

I’ve written a lot of specification tests like this in the last three years, from a UI / Workflow perspective, with Model-View-Presenter as my core UI architecture: [TestFixture] public class When_starting_some_process() { IMyView view; MyPresenter...

Published Thu, Feb 02 2009 3:16 PM by derick.bailey

Filed under: Unit Testing, Analysis and Design, Principles and Patterns, .NET, Model-View-Presenter, Behavior Driven Development, C#

PTOM: Command and Conquer Your UI Coupling Problems

This post is part of the November 2008 Pablo's Topic Of The Month (PTOM) - Design Patterns and will outline a simple Command pattern, its implementation and use. One of the core principles of object oriented software development is the idea of Coupling...

Published Wed, Nov 11 2008 9:23 PM by derick.bailey

Filed under: Design Patterns, Analysis and Design, Principles and Patterns, .NET

Encapsulation: Entities, Collections And Business Rules

Yesterday, I was involved two very separate yet very related conversations. One was via twitter with Colin Jack and Jimmy Bogard (which I was only a partial contributor to - mostly just reading their conversation) and another after work with a coworker...

Published Thu, Oct 10 2008 8:49 AM by derick.bailey

Filed under: Design Patterns, Refactoring, Analysis and Design, Principles and Patterns, .NET, Model-View-Presenter, Domain Driven Design

Dependency Inversion: 'Abstraction' Does Not Mean 'Interface'

A coworker recently asked if we should always abstract every object into an interface in order to fulfill the Dependency Inversion Principle (DIP). The question stunned me at first, honestly. I knew in my head that this was a bad idea - abstracting into...

Published Mon, Oct 10 2008 4:04 PM by derick.bailey

Filed under: Refactoring, Analysis and Design, Principles and Patterns, .NET, Domain Driven Design, Agile, Philosophy of Software, Lambda Expressions

DDD Question: Where does required info validation belong for an Entity?

Let's say I have a small hierarchy of object: Faults and Parts. A Fault can contain many parts, and a part has no meaning without being associated to a Fault. To ensure that I have no Parts without a parent Fault, I have this basic code in place:...

Published Wed, Oct 10 2008 9:54 AM by derick.bailey

Filed under: Design Patterns, Analysis and Design, .NET, Model-View-Presenter, Domain Driven Design

I'm Presenting @ ADNUG, Monday the 13th.

FYI - I'll be giving my S.O.L.I.D. Software Principles presentation at the Austin .NET User Group on Monday the 13th. This is the same presentation that I gave at Pablo's Day(s) of TDD last weekend, except I'll have the missing code in place...

Published Thu, Oct 10 2008 8:55 AM by derick.bailey

Filed under: Community, Analysis and Design, Principles and Patterns, .NET

DI and IoC: Creating And Working With A Cloud Of Objects

A few months ago, I posted some thoughts and questions on the proper use of Inversion of Control (IoC) containers and the Dependency Inversion (DI) principle . Since then, I've had the opportunity to do some additional study and teaching of DI, and...

Published Tue, Oct 10 2008 8:18 PM by derick.bailey

Filed under: Design Patterns, Refactoring, Unit Testing, Analysis and Design, Principles and Patterns, .NET

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