![]() ![]() We use the DataType keyword to give Avalonia a hint of which type each template is to be applied to. Let’s look at a modified version of the aboveĪs we can see we have two data templates for our two types. The TreeView control has a property called DataTemplates where we define the data templates for our items. The problem is we haven’t told it how to present our items. We also aren’t seeing the teams underneath each league. So that’s not exactly satisfying is it? Yeah we have our top level leagues but it obviously doesn’t know how to present it. If we run this out of the gate we get the following in our application: First, create a new project using the steps in Getting Started Let’s start with the simplest step, creating a backing data model and the corresponding TreeView Component. Please consult newer tutorials and documentation for how to use this against current releases of Avalonia. NOTE: This article is from 2019 and Avalonia has been under active development and improvement since that time. You can find the final solution for this blog post in this Gitlab Repository ![]() So screenshots and instructions will be from there but this obviously works with any editor. As an FYI, I’m doing my work in JetBrain’s Rider IDE This is based on a similar tutorial written for WPF by Mike Hillberg that you can find hereĮxcept that we are skipping the manual list aspects of it. In this tutorial we are going to go over creating a TreeView control for a league roster system. Tree Views are a standard control for looking at hierarchal data in a user interface. ![]()
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