Pillar, a MVVM framework for Xamarin Forms

Pillar logoI’m proud to annonce the release of Pillar, a lightweight MVVM framework for Xamarin.Forms 1.x and 2.x. With this framework, you won’t have to deal with page navigation or messed up code-behind anymore. Now, it’s all about view models, and navigation between view models. It rely on Autofac for dependency injection and MvvmLight for basic MVVM features and helper classes.

Features included in Pillar:

  • ViewModel navigation, you won’t need to manipulate pages in your view models
  • Design your apps with unit testing in mind with dependency injection
  • Flexible, you can use differents patterns: ViewModel first, Messaging, ViewModelLocator
  • EventToCommand behavior and useful converters included
  • Useful views: ItemsView repeater, with optional DataTemplate selector by item type
  • Not intrusive, you can reuse your view models in other projects (WPF for example) with very few modifications

Getting started

You can install Pillar with the Nuget package manager:

Install-Package Askaiser.Mobile.Pillar

You will find the documentation and samples on the GitHub repository. Continue reading “Pillar, a MVVM framework for Xamarin Forms”

Caching method results easily with AOP

In many cases, using a caching mechanism can drastically improve performances. Processed results of methods can be stored in memory or in files so they are ready to be returned immediately when we call the methods again.

In some .NET applications, we can use the MemoryCache class from System.Runtime.Caching to store data in memory. However, using such library in a basic way may induce some problems such as:

  • Adding caching in each method which needs it may result in less readable and polluted code.
  • The repetitive use of such code may induce errors (especially copy-pasted code).
  • Depending on the nature of projects (mobile apps, websites, web services, desktop apps), we may need a different caching approach.

In order to avoid all these problems, I have written a generic caching aspect using Autofac and Castle DynamicProxy. Continue reading “Caching method results easily with AOP”