What is CORS? | Fixing CORS errors in ASP.NET Core

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Has it happened to you that you have your modern frontend ready to talk to your ASP.NET Core backend but on the first request all you get is a CORS policy error?
Luckily, dealing with CORS is a very straightforward process, so here's how to configure CORS in an ASP.NET Core application.
Topics covered:
00:24 What is a cross-origin request?
02:08 What is CORS?
03:33 Invoking a Web API server from a Blazor WebAssembly client
12:42 Configuring CORS in ASP.NET Core
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#dotnet #aspnetcore #aspnet

[@RouteDeTours]

Finally a video that not only makes sense but actually works. Thank you so much. Por fin un vídeo que no sólo tiene sentido sino que realmente funciona. Muchas gracias.

[@juliocasal]

De nada!

[@oswaldumeh]

Amazing video! Never has CORS been explained so clearly. Wonderful job, senor!

[@juliocasal]

Glad it was helpful!

[@hernan.cortes]

A very common issue. Gracias por el excelente contenido, Julio!

[@juliocasal]

De nada!

[@kuljotbakshi967]

Amazing!!!!! solved in seconds!!!! CORS has got to be the most irritating thing to encounter as a developer!

[@juliocasal]

No kidding!

[@HomeSlize]

Good video. Thanks for the great content, Julio.

[@juliocasal]

My pleasure!

[@shaznishiraz]

Amazing content! as always

[@juliocasal]

Glad you liked it!

[@vietnguyen2521]

cool!!! thanh you so much

[@juliocasal]

Welcome!

[@AnGeLuz747]

Amazing explanation ... I have cors problems but with specials verbs (put, delete and options), I'm using windows authentication too and It is broking my mind... This only when I deploy the API in cloud server, any idea?... Thanks in advance

[@juliocasal]

Try appending .AllowAnyMethod() after .WithOrigins() to allow any verb. More info: learn.microsoft.com/en-us/aspnet/core/security/cors

[@shittusulaimon2716]

Amazing please work on a full asp.net 7 api course please

[@juliocasal]

It's coming! learn.dotnetmicroservices.com/courses/asp-net-core-full-stack

[@juliocasal]

Here: kzbin.info/www/bejne/d5mkqX-ffKhqhsU

[@dharanidevi4549]

How abt extra steps for post and put request

[@juliocasal]

I cover those here: kzbin.info/www/bejne/eKq8qp5umrJ6bMU

[@saurabhk96]

I have tried all steps and many other documents. Nothing worked.

[@juliocasal]

Hope this helped!

[@yasinmuratakyuz2253]

anlat anlat

[@juliocasal]

OK!

[@juliocasal]

?