![]() If you plan on cloning the companion repository it will be helpful to have the GitHub Extension for Visual Studio installed. Android SDK setup (optional, if you’re going to test on the latest version of Android).Your Visual Studio configuration should include the Mobile development with. Visual Studio 2019 for Windows or Visual Studio for Mac (The Community edition is free.) You’ll need the following resources to build the solution presented in this post: But if you want to skip ahead, all you need to do is clone the repo, as explained below. If you follow the tutorial steps in these posts you’ll end up with the same Visual Studio solution provided in the companion repository. Deploying and Running Your First C# Xamarin Mobile App.Building Your First Mobile App with C#. ![]() You’ll also want to learn about how to deploy and run your project on an Android or iOS mobile device. If you’re totally new to developing Xamarin apps you may want to read the introductory post in this series to get started. The partial class or code-behind for the XAML page then has properties which update the label when the button is clicked. The app is a simple counter app with a label and a button. The tutorial below will walk you through the steps required to add data binding to the project. To get you into the topic faster, there’s a companion repository on GitHub that provides a pre-built Visual Studio solution containing a Xamarin project. This post focuses on the basics of how data binding works in Xamarin. In this post you will use XAML and edit the existing code in the counter app. Instead, you want them to “automagically” update when new data has been fetched.Ī binding can be created either in XAML or code, so you have a choice, just like with the UI, of which you use. If you have multiple parts of your app that use that data, you don’t want to have to write code to update each of them. Data binding will make this app much easier to write, with fewer lines of code, as you won’t have to write code that tells the button that the value of the slider has changed and what to do in response.Īnother good example of data binding would be fetching data from a data source of some kind, like a database or REST API on a website. ![]() So, in this post you’ll add a slider to the user interface that will change the amount the count increments when clicking the Increment! button. For example, if you are playing basketball, you might score 1, 2, or 3 points depending on where on the court the shot was thrown. Sometimes, when keeping count, you don’t want to increment the value by 1. The simple counter app from the companion repository is the perfect candidate to be enhanced with extra features that can use data binding. This can be achieved through the power of data binding. You want them to be linked somehow so changes in one update another, or multiple, components. Often when developing UI for a mobile app, the components on the page are not in isolation. You’ll also gain experience using emulators to preview and test your user interface features. This post will give you a quick introduction to data binding with an example project that you can build on and extend to learn about additional features on your own. Data binding makes it possible to create rich user interface experiences for data-driven applications without writing a lot of code. Xamarin.Forms includes Data Binding, a way of keeping a user interface synchronized with its underlying data without having to write code for every aspect of managing those interactions. Xamarin XAML (try saying that five times fast) works in concert with code-behind C# classes, a structure you may be familiar with if you’ve worked with ASP.NET or ASP.NET Core. One of the time-saving and powerful aspects of Xamarin is Xamarin.Forms, a toolkit for building user interfaces with eXtensible Application Markup Language (XAML) to define how a user interface component in a Xamarin app will look and behave. You can use Xamarin without leaving the comfort of your Visual Studio development environment and you don’t have to buy and connect a bunch of mobile phones to test your apps: Xamarin includes emulators to give you a real feel for how your user interface will look and work. Xamarin is a powerful tool for building cross platform apps for Android and iOS devices.
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