Blazor form validation

Client-side Blazor supports DataAnnotations form validation out of box. It’s simple and intuitive but also very flexible – if needed we can use the same mechanism to replace DataAnnotations validation with some other validation component. This blog post introduces form validation in Blazor applications and peeks also into engine of validation mechanism.

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Self-contained executable with .NET Core 3.0 on Windows, Linux and Raspberry

.NET Core 3.0 comes with support for self-contained executables. It means we can publish applications as a single executable for specified platform. Also trimming – removing of unused code from assemblies – is supported. This blog post demonstrates how to build self-contained executables using .NET Core.

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Avoiding ping flood in ASP.NET Core health checks

Thing I left out from my post about ASP.NET Core health checks was the old legacy system we all know. It works and nobody wants to touch it. Other systems must be very careful with it because it is easy to break it down with load. Of course, there’s no way for us to replace or fix the elder monster. Here’s how to make sure we don’t take it accidentally down with too frequent ping checks or ping flood.

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Using Authorizing template of AuthorizeView in client-side Blazor applications

After blogging about authentication in server-side Blazor applications and discovering AuthorizationView component I was eager to find out how to use third authentication state Authorizing that is not available for server-side Blazor applications. This blog shows how AuthorizeView and Authorizing state work in client-side Blazor applications.

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Authentication failed because the remote party has closed the transport stream

One beautiful day I found the following exception from application error logs: “Authentication failed because the remote party has closed the transport stream exception” and one of our integrations was down. The problem occured only in ASP.NET MVC application. Background services using same external service were not affected. Here’s the solution.

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HttpClient: How to remove charset from Content-Type header

I was writing client library for one online service and faced situation where I had to remove charset definition from Content-Type header. It was like content type is application/json or response is 415 “Unsupported media type”. I was using HttpClient class to communicate with service and without additional efforts charset doesn’t go away. Here is how I got charset definition away from Content-Type header.

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