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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#

Role Specific Interfaces: DIP And ISP In Action

I do most of my UI development – in ASP.NET WebForms and in WinForms – with a Model-View-Presenter setup. It helps me keep my application logic separate from my view implementations, makes it possible to unit test the presenters, etc. I also like to use...

Published Sun, Mar 03 2010 2:56 PM by derick.bailey

Filed under: Principles and Patterns, .NET, Model-View-Presenter, C#

Don’t Expose IList<T> Just So You Can Assert Against Its Contents

Lately I’ve been trying to return IEnumerable<T> whenever I need a collection that will only be enumerated or databound to something. This prevents me from making changes to the collection outside the context of the collection’s parent entity. The...

Published Sat, Mar 03 2010 12:05 PM by derick.bailey

Filed under: Unit Testing, Principles and Patterns, .NET, C#, Pragmatism

How Ruby Taught Me To DRY Up My Code With Lambda Blocks

I’ve been working in Ruby for my Albacore project over the last 6 or 8 months, and taking every chance I can find to learn how to really use the language effectively. One of the benefits I’m seeing in a dynamic language like Ruby is the ability to really...

Published Fri, Mar 03 2010 3:32 PM by derick.bailey

Filed under: Principles and Patterns, .NET, Model-View-Presenter, Lambda Expressions, C#, Ruby, Pragmatism

When Do You Specify Expected Parameters In Stub Methods?

I’m writing a spec with a mock object that mock object returns data to the class under test. In these situations, I don’t bother asserting that my mock object’s method was called because I know that if it’s not called the data I need in the class under...

Published Thu, Mar 03 2010 5:20 PM by derick.bailey

Filed under: Unit Testing, Principles and Patterns, .NET, Behavior Driven Development, C#, Pragmatism

Field Vs. Property: Does It Really Matter?

Given my recent experiences with Ruby, my cursory knowledge of Java, and my past experiences with other object oriented systems, I find myself asking a lot of questions about why we do things the way we do in the C#/.NET space. Today’s questioning is...

Published Thu, Mar 03 2010 3:27 PM by derick.bailey

Filed under: Principles and Patterns, .NET, Ruby, Pragmatism

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

Result<T>: Directing Workflow With A Return Status And Value

I often code user interfaces that have some sort of cancel button on them. For example, in my upcoming ‘ Decoupling Workflow ’ presentation, I have the following screen: Notice the nice cancel button on the form. The trick to this situation is that I...

Published Tue, May 05 2009 10:35 AM by derick.bailey

Filed under: Principles and Patterns, .NET, C#, Presentations, Workflow

I’m Presenting At Austin Code Camp 2009

As Chad so eloquently stated, this year’s AustinCodeCamp really is going to be better than bacon ! And I feel honored to be one of the better than bacon speakers at this year’s event. I’m delivering two presentations: The SOLID presentation that I gave...

Published Mon, May 05 2009 9:29 PM by derick.bailey

Filed under: Community, Principles and Patterns, .NET, Austin Code Camp, Presentations

Decoupling Workflow And Forms With An Application Controller

One of the big problems I’ve been trying to solve recently, is in my current WinForms application that using a Model-View-Presenter setup. I have my workflow between forms coupled to the forms directly. That is, in order to get from MainForm to SubForm...

Published Sat, Apr 04 2009 2:04 PM by derick.bailey

Filed under: Design Patterns, Principles and Patterns, .NET, Model-View-Presenter, C#, AppController, Git

Closures in C#: Variable Scoping and Value Types vs Reference Types

I read Sergio’s post on “ Javascript, time to grok closures ” today and it was very enlightening. Overall, it helped me to understand closures more than I previously had – not just in Javascript, though. I put together a quick sample on closures in C#...

Published Mon, Feb 02 2009 2:10 PM by derick.bailey

Filed under: Principles and Patterns, .NET, Lambda Expressions, C#

Proactive vs Reactive Validation: Don’t We Need Both?

Update: There’s a wealth of knowledge out there that I just haven’t been aware of until now. Thanks to the many commenters of this post, other posts, and other conversations for the links and info. Here is a list of items that I’m finding to be very helpful...

Published Sun, Feb 02 2009 1:49 PM by derick.bailey

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

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#

Mapping A State Pattern With NHibernate

In the comments of my previous post - Descriptive State Enumeration - Maxim Tihobrazov asked me to show how to map a state pattern with NHibernate; and I am more than happy to oblige! NHibernate Mapping Options I certainly don't claim to be an expert...

Published Wed, Nov 11 2008 8:42 PM by derick.bailey

Filed under: Design Patterns, Principles and Patterns, .NET, Lambda Expressions, NHibernate, Data Access

PTOM: Descriptive State Enumeration

This post is part of the November 2008 Pablo's Topic Of The Month (PTOM) - Design Patterns and will primarily outline the State pattern, with an Enumeration or Descriptor pattern thrown in for good measure. Switch statements and if-then statements...

Published Wed, Nov 11 2008 2:31 PM by derick.bailey

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

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