jscii | JavaScript image to ASCII converter | Graphics library

Link to project: HERE - Must download!

I have decided to provide you with a full - MVVM example, so that you can learn how to do it "the proper way".

Note: I am using MVVM Light (for it's RelayCommand). You can install it through NuGet. It's worth having, as it provides a lot of useful classes for MVVM development. Another alternative to it is Prism.

1. What is MVVM?

MVVM (Model - View - ViewModel) is a programming pattern, that goes along perfectly with WPF. It's main purpose is to detach Views - what you see, from ViewModels - your program's logic.

It can result in a little bit more coding needed, but the payoff is great - you get a clean, structured code, that is modular and VERY easily testable (namely, Unit Tests).

1.1 - Model

Model is basically the structure of your program. It should provide the backbone for your classes, that hold the Data and are further used in ViewModels.

In the case of this project - there is no model though - as its not needed (it surely will become needed as you progress with your application!)

1.2 - View

The View is basically what you see. Most often it is a Window, that has elements it displays - but it doesn't have to be only that! A UserControl can be a View in itself, and have it's own ViewModel bound to it - a different one than the Window it is in.

1.3 ViewModel

A ViewModel is basically the core of your program. It holds the logic and has properties, that the View can bind to and use/display in its' controls. Consider this a brain of your application.

2. Code

View: