Exceptions

Task EventHandlers – The Little Secret You Didn’t Know

As C# programmers, we've all been burned by asynchronous EventHandlers. And if you still haven't yet, then hopefully this article will arm you for being able to better navigate long debugging sessions where functionality mysteriously stops working in your application. While there are several different solutions for dealing with async event handlers, either by avoiding use of async void or even by embracing async void, in this article we will explore another option which is Task EventHandlers. Disclaimer: this article was originally written with the perspective that this solution feels close to bullet-proof, but there are important limitations. These limitations are addressed later in the article, and I felt it would still be valuable to explore the space (both positives and negatives). A Companion Video! https://www.youtube.com/watch?v=QVGjpRz0JZU What you DIDN'T know about C# Async EventHandlers The Source of the Problem Normal…

0 Comments

February 18, 2023

CodeProject / Programming / Tips / Tutorial

Async EventHandlers – A Simple Safety Net to the Rescue

When we discuss async EventHandlers, the first thing that comes to mind for many of us is that it's the only exception that we seem to allow for the dreaded async void setup. When I had written about this before, I was excited that I was exploring a solution that involved actually allowing async void to exist (without wanting to pull the rest of my hair out). For me, this was much more about some clever tricks we can use to overcome async EventHandlers than it was to provide solutions for avoiding the problem entirely. With that said though, there was a lot of traction on the article, which I am very thankful for, and some folks expressed opinions that they'd rather solve async EventHandlers a different way. I thought this was a great point, so I wanted to come…

0 Comments

February 14, 2023

CodeProject / Programming / Tips / Tutorial

async void – How to Tame the Asynchronous Nightmare

You're an intermediate dotnet programmer and you mostly know your way around using Tasks. You sprinkle async and await through your code, and everything is working just as expected. You've heard time and time again that you always want the return types of your asynchronous methods to be a Task (or Task<T>) and that async void is essentially the root of all evil. No sweat. One day you go to wire up an event handler using the syntax myObject.SomeEvent += SomeEventHandler, and your event handler needs to await some asynchronous code. You take all of the right steps and change your method signature to get that beautiful async Task added in, replacing void. But suddenly you get a compile error about your event handler not being compatible. You feel trapped. You're scared. And then you do the unspeakable... You change…

6 Comments

January 27, 2023

Code Smells / Perspective / Programming / Tips / Uncategorized

Code Smells – Issue Number 3

Code Smells Welcome to the third edition of Code Smells! Periodically I’ll be posting about how to detect code smells and what they mean in terms of the big picture of your code. The previous installment can be found right here. What’s a code smell? Wikipedia says it perfectly: In computer programming, code smell is any symptom in the source code of a program that possibly indicates a deeper problem. Code smells are usually not bugs—they are not technically incorrect and don’t currently prevent the program from functioning. Instead, they indicate weaknesses in design that may be slowing down development or increasing the risk of bugs or failures in the future. These code smells are often based on my own opinion and experience with programming. If you disagree with what I'm saying in my post, please don't hesitate to post a comment. I'd love to clarify anything I may have worded poorly and discuss…

0 Comments

November 27, 2013

End of content

No more pages to load