Xamarin.Forms Fundamentals: MVVM

In my previous post we started with a blank Xamarin.Forms app and added manual data-binding.   That is, when a button was pressed, we assigned the value in an entry control to the text property of a label. 


Today we’ll look at a better way of doing that.  But hold on to your hat, and fasten your seat belt, because we’re going to dive into the deep end.   

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Xamarin Fundamentals

In my previous (and first) posting on Learning Xamarin, I demonstrated how to create a pretty cool program out of the box.  Let’s back up now, and start with a blank app, and see what we can build from there.

Create a new project as described in the previous posting, but this time choose a Blank application.

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I’m Back! With Xamarin.Forms Programming

It has been a few months since I’ve posted, and I hope you missed me as much as I missed you.  To re-launch this blog, I’ve decided to provide a series on Xamarin.Forms programming.  

If you prefer to learn by watching a video, check out this video course.

If you are new to Xamarin.Forms (and I’m assuming you are) then there is a lot to learn, but none of it is very difficult… ok some of it is, but not until you’re into very advanced topics.   The one thing you do need to know is C#. You don’t have to be an expert, but you do have to be comfortable with the language.

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Posted in Essentials, MVVM, Programming, Xamarin, XAML | 2 Comments

TypeScript for C# Programmers – Slide deck

Here is a link to the slide deck for my presentation at NYC Code Camp.


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MVVM Ping Pong

Here’s a problem I come across more often than I would have expected.  I want my buttons to use Commands in the View Model, but in response to the command, I have to interact with the user in a way that is much easier to do in the code behind.

Let’s take the example of a user pressing a button to delete a record.  The button calls a command in the ViewModel, but I want to show a confirmation dialog box in the view.  If the user affirms the deletion, I want to do the work back in the View Model.  Oy.

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Posted in MVVM, Xamarin | Tagged , | 8 Comments

Yet Another Podcast #182: OzCode

OzCode is an extraordinary debugging tool for Visual Studio (Windows).  I’m joined by Omer Raviv, Creator and CTO of OzCode and Alon Fliess, Co-founder of CodeValue and Chief Architect at OzCode. Alon is a Microsoft Regional Director and an Azure MVP.

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Xamarin Quick Hit: Dimming a button to indicate it is disabled

I often have to dim a button to indicate that it is disabled, and I want to do that via data binding.

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Posted in Essentials, Learning, Xamarin, XAML | Tagged | 1 Comment

Visual Studio for Mac – my newest Pluralsight Course


At the core of effective application development is a thorough knowledge of Visual Studio Mac. In this course, Visual Studio for Mac, you will learn how to work with VS Mac to produce enterprise-quality software. 
First, you will explore the IDE by taking an extensive tour. Next, you will learn how Visual Studio Mac supports source control; specifically Git. Finally, you will discover how Visual Studio Mac supports Azure. When you are finished with this course, you will have a foundational knowledge of this integrated development environment that will help you as you move forward to creating software.

Click here

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Learn to Program (From Scratch!)

John Papa and I have just released our new Play by Play on Learning To Program.   If you know of someone who has wanted to learn to code but didn’t know where to start, this might be a great option.

Posted in Essentials, Learning, Programming | 5 Comments

App Center Distribution

In my previous posts I showed how to get started with App Center and how to build an app on App Center.  In this post, I will demonstrate how to distribute your shiny new app to  your alpha or beta testers.



Return to App Center and confirm that your application has been built with the latest check in.  Next, create your distribution group.

Create A Distribution Group

To do so, click on Distribute Groups, where you will see a button in the upper right hand corner: New Group.

Create and name your group (e.g., Alpha Testers) .  You can allow public access , but then device registration won’t work (at least for now).  Leave this off, and enter email addresses into the box labeled Who would you like to invite to this group?

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Yet Another Podcast #181 – Matthew Robbins on MFractor

Matthew Robbins is a Xamarin and Microsoft MVP and he is the creator of MFractor, a mobile-first utility for Visual Studio Mac.

Our site: https://www.mfractor.com/
Documentation: http://docs.mfractor.com/
Localisation Tooling Blog: https://www.mfractor.com/blogs/learn/localising-your-xamarin-forms-apps

Notice: Yet Another Podcast listeners can use the following discount code for 10% off MFractor Professional!  YET-ANOTHER-PODCAST

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Building Your App On App Center

In my previous (and first) blog post on App Center I talked about getting started, adding the SDK to your code, and looking at Analytics and Crash reporting.  In this post I’d like to discuss building your app on App Center; which allows you to distribute your app to Beta testers and others.

There are a few steps in setting up and configuring your build process, but once done, building is as simple as pressing a button (or, even simpler, you can set it up to build on every push to your source control!)

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