Saturday
- Maui Time, Hawaii
Null propagation in C# allows for short circuiting of void method calls, but when using result-less `await` async calls, this behavior works decidedly different, resulting in null exception runtime errors. While this behavior makes sense when you break down the command, it's certainly not obvious. In this post I break down the how and why of the failure and how to work around it.
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April 15, 2021
- Maui Time, Hawaii
I've been puzzling over how to reliably integrate keyboard forwarding from the WebView2 control into WPF host forms. Unlike the IE WebBrowser control the WebView2 doesn't automatically forward Alt keys to the host form so special handling is required. In this post I describe why this is a problem and show the workaround to make this work.
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March 23, 2021
- Maui Time, Hawaii
I've released v1.0 of my LiveReload Web Server which is a local static file Web server that includes support for LiveReload, plus some optional dynamic features for rendering self-contained RazorPages and Markdown content. This Dotnet Tool is fast, easy to use and includes a host of convenience features that try to make the process of working with local Web content quicker and easier.
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March 09, 2021
- Maui Time, Hawaii
ASP.NET Core Authentication and Authorization continues to be the most filddly part of the ASP.NET Core eco system and today I ran into a problem to properly configure JWT Tokens with Roles. As I had a hard time finding the information I needed in one place and instead ended up with some outdated information, I'm writing up a post to hopefully put all the basic bits into this single post.
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February 04, 2021
- Maui Time, Hawaii
Opening Windows Terminal from another application is a bit of a pain. In particular I wanted to open Windows Terminal as an External Tool from Visual Studio and found it wasn't as easy as referencing the `wt.exe` executable. Opening as an Administrator adds additional complexity. In this post I'll talk about the use case of an External Tools and the settings to launch both a regular and admin Windows Terminal instance from External Tools.
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January 26, 2021
- Maui Time, Hawaii
In part 2 of this post series I take a look at how to use the new Chromium WebView2 to interact with the DOM document and interoperate between .NET and JavaScript, both calling into JavaScript from .NET, and calling into .NET from Javascript
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January 14, 2021
- Maui Time, Hawaii
This is Part 1 of a two part article that gives an overview of the new WebView2 Web browser control that is based on Edge Chromium. In Part 1 I look at the basics of what's needed to run the control using the WebView runtime, and how to get the control embedded and configured to use for basic HTML tasks. In Part 2 I look at interaction between the .NET application and WebBrowser and Javascript.
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January 05, 2021
- Maui Time, Hawaii
Recently needed a way to display a set of numbers in a WPF List display that required that values with a value of `0` display blank - using no explicit code or model changes. I learnt something new today: There's actually a way to use C# format strings to format numbers separately for positive, negative and zero values. Here's how that works.
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November 25, 2020
- Maui Time, Hawaii
I recently ran into a snag with one of the my Windows Server installs of an upgraded .NET Core 5.0 application. It turns out I didn't install .NET Core 5.0 correctly because I made some bad assumptions of what I needed to install to run my application, even though it previously ran on .NET Core 3.1. Here's more detail on what the failure looks like and how to properly install .NET Core 5.0.
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November 24, 2020
- Maui Time, Hawaii
Over the last week I spent some time upgrading several .NET Core Web applications and libraries from .NET Core 3.1 to .NET 5.0. I'm happy to say that this was always a non-event as the process went very smooth for once. In this post I'll talk about what I found and also offer some commentary why we should celebrate this update and push Microsoft to continue along this path.
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October 15, 2020
- Maui Time, Hawaii
A little while back I posted a couple of pictures of my new desk setup using both a Windows Laptop (a 2019 Dell XPS) and a Macbook Pro (2016) along with two 4k displays. I'm also using a single Logitech Mouse and Keyboard combination to control both machines and quite a few people were asking about how this works. So I decided to write a quick review of my setup here to give a few more details that are hard to give in a Twitter conversation.
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October 12, 2020
- Maui, Hawaii
Ran into a problem with properly activating a WPF when launching from Explorer and indirectly trying to activate an already running instance 'from within itself'. It seems simple, but windows focus-stealing restrictions can cause problems with actually getting focus into an application window. Here's how.
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October 05, 2020
- Maui, Hawaii
Custom project templates can be extremely useful in quickly creating new projects especially for extensible applications. They're also great for creating specialized setups to make it quicker to hit the ground running. With the .NET SDK tooling new project templates are now easy to create and this post takes you through the process.
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September 16, 2020
- Maui, Hawaii
Retrieving images from the clipboard with WPF seems so simple, but once you get into it you'll find that there are lots of problems with reliable image retrieval that works for all images. In this post I talk about the different issues you're likely to run into and one hacky but flexible solution to better image support by selectively sniffing image formats and using different clipboard retrievals based on the image format.
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September 14, 2020
- Maui, Hawaii
I recently got burned in an upgraded ASP.NET Core server application where a missing `await` statement caused wildly inconsistent and puzzling output failures. While a simple thing to avoid, once introduced it's possible to live with this error for some time before it manifests. In this post I show a scenario where a missing `await` was causing infrequent HTTP response errors, even though the client apparently receives a valid response.
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August 05, 2020
- Maui, Hawaii
Dotnet Tools offer a simple way to create, publish and consume what are essentially .NET Core applications that can be published and shared using the existing NuGet infrastructure for packaging and distribution. It's y quick and easy to build tools that you can share either publicly or privately. In this article I make a case for why you might use or build a Dotnet Tool and show how create, build, publish and consume Dotnet tools as well as showing some examples of useful tools I've build and published.
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July 28, 2020
- Maui, Hawaii
Filters are not new in CSS, but their often overlooked for providing some useful generic behaviors for things like hover styling or nice background effects. In this post I discuss how to use the brightness() filter to create a generic button hover behavior and also briefly discuss the newish `backdrop-filter` property.
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July 25, 2020
- Maui, Hawaii
I still use Web Site projects frequently for purely static Web sites that don't require a proper build process where 'DevOps' of any kind is overkill. Invariably when using Web site projects though, I end up requiring that 1 or 2 files are excluded on publishing and every time I do I spent a while trying to find the information how to do that in the `.pubxml` file. Well no more - I'm writing it down this time.
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July 12, 2020
- Maui, Hawaii
When building ASP.NET Core backends for SPA applications one thing that you have to worry about is how to handle client side routes that end up being fired against the server through external or reloaded links. While ASp.NET Core has built-in support for this if you build a generic Web server, you might need a little more control on how to handle the Fallback routing functionality. Here's how.
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July 10, 2020
- Maui, Hawaii
In this short post I'll discuss a small Console helper class I've been using to make it easier and more consistent to use colors with the .NET Console command. The .NET Console support colors easily enough, but switching colors and resetting them can be a bit tedious, so these helpers make working with color a bit easier.
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June 26, 2020
- Maui, Hawaii
Apple doesn't exactly make it easy to use iOS devices on Windows and one complication is how you can cast your iOS device to a Windows screen. This is useful for presentations or screen captures that I often do and in the past i've gone through a number of shady tools that have come and gone. Recently ran into 5KPlayer which is a nice video player that as a bonus acts as an AirPlay server and makes short work of casting iOS content to Windows
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June 23, 2020
- Maui, Hawaii
Live Reload is now common for client side application development and it has become ubiquitous for Web development. But setting up Live Reload to work on a phone is not quite so obvious. In this post I'll walk you through what you need to do to get Live Reload to work on a mobile device for more productive on-device execution.
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June 12, 2020
- Maui, Hawaii
If you're using the Static File Provider in ASP.NET Core you might need to add some additional extensions that are not handled by default. For example, if you host a Blazor site in your own application an additional mime mapping for `.dll` is required. Here how you can map extra extensions to the Static File middleware.
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May 28, 2020
- Maui, Hawaii
WebSockets in ASP.NET Core are easy to use but due to the simple model it's easy to forget that socket requests are long lived and can linger for a long time in the background and that can cause problems when an application needs to shut down cleanly. Luckily there's an `IHostApplicationLifetime` interface available that allows hooking shutdown operations and that provides the necessary cancellation tokens to allow an WebSocket connection to be terminated in response to a shutdown event. This post shows how this works.
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May 25, 2020
- Maui, Hawaii
Ran into a weird issue today with AdSense in one of my older Web sites. I noticed that the site was not using the custom scrolling in containers that I've been using for years. Turns out Google's AdSense on this page is injecting some extra styling that changes the scroll behavior - and the way the entire page works. Here's what the problem is and how you can work around it.
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