Web Archives - Jonathan Crozier

Validating and Sanitising filenames in a Blazor WebAssembly app

Blazor WebAssembly is a fantastic framework for building rich client-side applications, almost entirely in C#. However, it comes with a few subtle quirks that can catch us developers off guard. One of the less obvious quirks to be aware of surfaces when you need to validate or sanitise a filename specified by a user; something…

Auto-Registering and injecting multiple Handler Interfaces in ASP.NET Core

InAPIs Programming

When building ASP.NET Core applications, it is common practice to implement multiple classes that share a common interface, particularly when working with design patterns such as Chain of Responsibility or when dispatching work to a set of discrete handlers. A typical example of this might be a collection of INotificationHandler, ICommandHandler, or IEventHandler implementations that…

Styling Blazor child components with CSS Isolation: What you really need to know

InWeb

One of the most useful, yet often overlooked, aspects of Blazor’s CSS isolation support is the ability to style child components. At first glance, it may appear that isolated CSS can only be applied to the component to which it is attached; however, with a little help from the ::deep pseudo-selector (the “deep combinator”), it’s…

How to fix scrolling issue after closing Google AdSense Consent dialog

InWeb

Since Google’s New Consent Management Platform requirements for serving ads in the EEA and UK came into effect this year (2024), websites that display Google AdSense advertisements must show a Consent dialog to users. This is part of IAB Europe’s Transparency and Consent Framework. One of my blog readers kindly pointed out that ever since…

Communicating with ASP.NET Core hosted services from API endpoints using Channels

InAPIs Web

Hosted services are a powerful .NET feature, providing a robust mechanism for executing long-running background tasks in different types of applications. Given the flexible nature of .NET, such applications could be running on client devices, on-premise servers, or the cloud, depending on the particular use case. When it comes to ASP.NET Core, hosted services are…

ASP.NET Core runtime exception: Could not load type ‘Microsoft.IdentityModel.Json.JsonConvert’

InAPIs Web

When developing ASP.NET Core web applications, it is common to interact with JWTs (JSON Web Tokens). Quite often you will want to validate JWTs and possibly even generate your own JWTs to secure API endpoints. However, it’s not always plain sailing when it comes to software development. After updating certain Microsoft NuGet packages to newer…

Exploring ASP.NET Core Minimal APIs: Should I use them in production?

InAPIs

If you’ve been keeping up to date with what’s new in the .NET ecosystem over the last year or two, you’ll probably already be aware of the Minimal APIs feature that debuted in ASP.NET 6.0 back in 2021. However, since Minimal APIs are still a relatively new concept, perhaps you haven’t considered using them in…

Why you can’t debug your Blazor WebAssembly application

InWeb

You’ve had enough. Yes, you’ve finally decided that this is the last time you’ll use a Console.WriteLine method call to troubleshoot one of your Blazor WebAssembly components because you can’t get any debug breakpoints to hit! Debugging is an essential part of software development and when it doesn’t work, it can be frustrating. This is…

What to do when emojis are not rendered correctly by ASP.NET Core web applications

InWeb

For better or worse emojis have become part of our everyday life, we use them to communicate our emotions and as a quick way to acknowledge our approval or disapproval as the case may be! 👍 Recently I came across what seemed to be a rather odd issue where an emoji was being used within…

Understanding the Blazor component lifecycle

InWeb

As a Blazor developer, it is essential to have a solid understanding of the lifecycle events that take place from the moment a Blazor component is created until it is eventually torn down. By gaining an understanding of the Blazor component lifecycle, you will be able to make your components more efficient and reduce the…

Tag: Web

Validating and Sanitising filenames in a Blazor WebAssembly app

Auto-Registering and injecting multiple Handler Interfaces in ASP.NET Core

Styling Blazor child components with CSS Isolation: What you really need to know

How to fix scrolling issue after closing Google AdSense Consent dialog

Communicating with ASP.NET Core hosted services from API endpoints using Channels

ASP.NET Core runtime exception: Could not load type ‘Microsoft.IdentityModel.Json.JsonConvert’

Exploring ASP.NET Core Minimal APIs: Should I use them in production?

Why you can’t debug your Blazor WebAssembly application

What to do when emojis are not rendered correctly by ASP.NET Core web applications

Understanding the Blazor component lifecycle

Validating and Sanitising filenames in a Blazor WebAssembly app

Auto-Registering and injecting multiple Handler Interfaces in ASP.NET Core

Updating YARP configuration at runtime