Getting Started with Xamarin.Forms and Azure Mobile App Service

Jeff Hopper .NET, Azure, Mobile, Technology Snapshot, Tutorial Leave a Comment

Earlier this month my friend Ryan introduced us to Getting Started with Xamarin Forms and Prism. In that post, Ryan started a mobile application to display blog posts which he called SimpleBlog.

In this article, I would like to continue that demonstration by adding a back-end server to persist and share these blogs. This will be accomplished using Azure’s Mobile App Service which falls within its free tier services.

Yes, you did read that right: you can spin up an Azure account and have access to try out many of Azure’s features. For instance, the example I am going to walk you through today can be hosted indefinitely without costing you anything, and to that, you could add nine more web, mobile, or API services. See https://azure.microsoft.com/en-us/free/ for more information.

There is no way I am going to be able to cover all the possibilities available in an Azure Mobile App service, much less what Azure has to offer. My intent in this post is to help “whet your appetite” on the possibilities by giving a quick overview of just two great frameworks that play great together: the Microsoft.Azure.Mobile.Client mobile framework tied to an Azure Mobile Apps Service….



Getting Started with Xamarin Forms and Prism

Ryan Nguyen .NET, Mobile, Technology Snapshot Leave a Comment

In this blog, I’ll show you how easy it is to create an Android and iOS application using Xamarin Forms while utilizing Prism.

What are Xamarin Forms?
Xamarin Forms is a platform that allows developers to create native Android, iOS, and Windows applications while using the beloved C# programming language. 

An attractive feature of Xamarin Forms is that it uses a shared C# codebase to create a native user interface specific to their platform. Out of the box, Xamarin provides large collections of controls to get started. It also has the ability to access native platform features, such as camera access, GPS, text to speech, etc, by using the Dependency Service.

What is Prism?
According to the Prism website, Prism is defined as “a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, Windows 10 UWP, and Xamarin Forms. Prism provides an implementation of a collection of design patterns that are helpful in writing well-structured and maintainable XAML applications, including MVVM, dependency injection, commands, EventAggregator, and others.” In other words, Prism helps users to write better code…. 



Service Discovery with Eureka and Zuul

Jarett Lear .NET, Microservices, Spring, Spring Boot 1 Comment

One issue that we face day to day as developers is speed of development. One of the coolest things to me in the ever-changing landscape of technology is how this issue us continually being addressed in an effort to makes our lives easier.

We have gone from having to write everything needed in a verbose way to being able to configure a simple REST API in a few lines of code with Spring Boot. The most amazing part of this is not only the ability to create the web services but also the ability to allow these services to communicate in a smart way. Spring has given us many tools to allow easy configuration and putting together things that just work (mostly).

This post is not to be considered a full guide to which the extent of these technologies can be leveraged. In this post, we give examples of how Spring Boot can be used (along with Zuul and Eureka) to create a simple discovery service.

There are other components that can be added for things like a configuration server to pull all application.properties files from a common location that is updatable in real time, or circuit breakers to allow the graceful failing of different pieces of your API.

What this post will focus on is the service discovery between Spring Boot applications. We will also touch on how, using SteeltoeOSS, .NET applications can also take advantage of being a part of the service discovery and be routed through our Spring Boot-based Zuul Gateway. We will also look at how we can integrate Spring Security into our gateway to secure the entire API no matter the language…



Keyhole Sponsoring Azure Dev Days Kansas City 2018

Keyhole Software .NET, Azure, Community, Company News Leave a Comment

We are excited to announce Keyhole’s partnership with Microsoft to sponsor Azure Dev Days, a one-day workshop in Kansas City on Wednesday, April 25, 2018. This is a free community event to provide education on application modernization, microservices, and Microsoft Azure topics.

In addition to providing technical educators for this workshop, Keyhole Software will sponsor food and beverages. The topics Keyhole will champion include Microservices and Containers, as well as App Services.

Each technical session will be followed by a hands-on Azure lab and a whiteboard design exercise. This workshop will help attendees gain a thorough understanding of the components of Azure and how you can take advantage of them as a developer.

This is a traveling community event, with other events available to attend in St. Louis and Oklahoma City. The event will be held at the Microsoft offices in Overland Park…



White Paper Published: Blockchain for the Enterprise

Keyhole Software .NET, Blockchain, Company News, Java Leave a Comment

The Keyhole team is proud to announce the publishing of a new white paper: Blockchain For The Enterprise. 

While Bitcoin is on the minds of the general public worldwide, blockchain is on the minds of information technology professionals. It is the underpinning technology of the powerful and popular cryptocurrency. What exactly is blockchain and how will it help my business? That is what this white paper seeks to answer.

In the most simple terms, a blockchain is a distributed data system for keeping a ledger of immutable data transactions. We will explore additional complexities through this document, but the simplest way to think of it is a highly distributed transaction log. If you happen to be a developer and you are using Git for source code control, you are already using some of the distributed blockchain elements.

In this white paper, we discuss a number of topics related to blockchain with a particular emphasis on the enterprise. This document will be in three major parts. Part one will include a brief overview and history of blockchain, part two will include a deep technical dive, and the third part is written with the intent to aid managers and executives in their decision making in regards to blockchain…