Dotnet (.NET) Performance Tracing for WinUI, Uno and Maui Applications

With the transition from UWP to WinUI and from Xamarin iOS/Android to .NET for iOS and Android, we’re seeing the convergence of application development in the .NET ecosystem. This convergence shouldn’t be undervalued and is particularly evident when you realised that all of these once disparate platforms, can now take advantage of the common tooling … Read more

Fixing Broken DefaultButtonStyle in Windows UI (WinUI) / WinAppSdk

In writing my previous post on Implicit and Explicit Styles in XAML I was reminded of a bug in the definition of the DefaultButtonStyle which prevents you setting the Foreground colour of a Button. The issue is documented, along with the fix, in this issue but for whatever reason (and I can’t think of one … Read more

The Future of Multi-Platform .NET Application Development with WinUI, Net6 and the Uno Platform

In my previous post I started a series talking about using the Uno.Extensions that the Uno Platform team have been working on. This post was supposed to be a follow-on post but instead I want to recap one of the topics in the previous post. In case you missed the announcement, version 4.3 of the … Read more

Add Uno.Extensions to a WinUI Multi-Platform Uno Application

This post will be the first in a series of posts talking about Uno.Extensions, a set of libraries that the Uno team have been working on to simplify common application scenarios and make it quicker and easier to build robust multi-platform applications using the Uno Platform. The source code for this post, and subsequent posts … Read more

Styling Controls for Windows Apps

One of the things that we take for granted when using applications that have been designed for Windows is the subtle cues that exist for when you’re using the mouse and/or keyboards. For example when you mouse over a button, or an item in a list, the background color changes slightly. Similarly when you use … Read more

Xamarin.Forms, .NET Maui and the Uno Platform

The .NET Maui team at Microsoft recently dropped Release Candidate 1, so I thought it worth taking a quick look at how it compares to both it’s predecessor, Xamarin.Forms, and the Uno Platform, which is arguably the market leader for building multi-platform application with .NET. If you missed the announcement by Microsoft, here’s a tweet … Read more

UI Testing for WASM (WebAssembly) with the Uno Platform

One of the guilty truths of software development is that despite our best efforts we never write enough tests, and seldom do we write enough automated tests. This isn’t entirely our fault because for some reason testing frameworks, particularly those for UI testing, always seem to be an after thought. In this post we’re going … Read more

Control the Window of your WinForms, WPF or Windows UI (WinUI) app using the Windows App SDK

Code sample for this post is on GitHub: AppWindowSample One of the more significant differences between building apps for mobile devices, such as iOS and Android, and desktop pcs (Windows or Mac) is the concept of windows. On a mobile device, your app typically runs full screen, or perhaps split screen on some devices, so … Read more

Packaged, Unpackaged and Self-Contained WinUI 3 Apps with the Windows App Sdk

As we get progressively closer to the v1 release of the Windows App Sdk I thought it worth looking into the different deployment/packaging options you have. In this post we’re going to look at the startup logic for a WinUI 3 Desktop application and discuss how this relates to the different packaging options that are … Read more

Custom Validation Attributes and Multi-Language Resource Loading for Validation with INotifyDataErrorInfo for XAML Applications (UWP, WinUI, Uno)

I think this will be the last in the series of posts covering validation using the INotifyDataErrorInfo interface, which can be used to expose validation error messages directly in your XAML. In this post we’re going to look at adding custom validation using both the CustomValidationAttribute and by creating our own ValidationAttribute. We’ll also look … Read more

Customising Error Messages with INotifyDataErrorInfo Validation for XAML Applications (UWP, WinUI, Uno)

In my previous post, Adding Validation to a XAML Control Using INotifyDataErrorInfo, I walked through adding validation to a view model using the INotifyDataErrorInfo interface and the Community Toolkit. This post will pick up where that post left off and look at how you can customise the error message that gets displayed. This will improve … Read more

Adding Validation to a XAML Control Using INotifyDataErrorInfo and the CommunityToolkit for WinUI, WPF, UWP and Uno

In my previous post on Building a XAML UserControl I made use of the CommunityToolkit.Mvvm (formerly Microsoft.Toolkit.Mvvm) NuGet package to provide the implementation of INotifyPropertyChanged used to data bind properties of our view model to the XAML controls. In this post we’re going to again use the community toolkit but this time we’re going to … Read more

Building a XAML UserControl for WinUI, UWP, WPF or Xamarin.Forms (.NET MAUI)

One of the powerful aspects of any XAML platform is the ability to define your own controls. In this post we’re going to look at building a user control that allows you to reuse chunks of your user experience. It doesn’t matter whether you’re using UWP, WinUI, Xamarin.Forms (.NET Maui) or the Uno Platform, the … Read more

Camera Preview Control for WinUI, UWP and Uno (iOS & Android) Applications

The Windows Community Toolkit provides a limited feature camera preview control for both UWP and WinUI but this doesn’t help if you want to build a cross platform application with the Uno Platform. In this post I wanted to share the very, very, very early version of a CameraPreview control for Uno. Initial support will … Read more

I am a Windows App Developer

With the recent excitement surrounding the announcement of Windows 11, there’s renewed interest in developing apps for the Windows platform. In this post we’re going to celebrate what it means to be a Windows App Developer, regardless of what framework or technology you chose. It’s not going to be an exhaustive list of options but … Read more

Image Resizetizer for WinUI and Uno Applications

Whilst I was working on migrating the WeatherTwentyOne app from Maui to Uno I noticed that the Maui application includes a number images as SVG files. However, in the XAML there are only ever references to PNG files. On closer inspection of the bin folder for the WinUI project I noticed that for each SVG … Read more

Converting the WeatherTwentyOne app from dotnet Maui to Uno

As the dotnet Maui team continue to churn out each preview, it’s great to see some of the showcase apps coming together. One of these is the WeatherTwentyOne app that David Ortinau has been working on. Whilst I’ve been doing a lot of work with the Uno platform recently, I haven’t been spending as time … Read more

Ditch that Packaging Project with the Windows App SDK (Windows UI)

One of the most annoying “features” of both UWP and WinUI/ProjectReunion WindowsAppSDK apps is the need to generate a package. With UWP development, the packaging was built into the UWP project. However, with the WindowsAppSDK, a separate packaging project is currently required. In this post we’re going to walk through how you can remove this … Read more