FILTERS In ASP NET Core | Getting Started With ASP.NET Core Series

Hello Friends, Filters in ASP.NET Core allow code to be run before or after specific stages in the request processing pipeline. There are built-in filters like Authorization and Response Caching. You can also write Custom Filters to handle cross-cutting concerns like error handling, caching, configuration, authorization, logging, etc. Filters avoid duplicating code and consolidating functionality into a single place.
In this video, let's learn more about Filters in ASP NET Core, how it works, how to set it in the request pipeline by creating custom filters. We will learn about Synchronous and Asynchronous Filters and how they work. I will also show you the different scopes that filters can be applied and how the ordering of it works.
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[@antarikshsharma573]

This is the second video of yours which I am watching and to be honest, I am liking it. Crisp clear and up to the point. Great work!

[@RahulNath]

Welcome aboard Antariksh and glad you liked the videos! Do check out the full series here, I am sure you will like them bit.ly/asp-net-core-series

[@vishalcoder4964]

Great, please come up with more such awesome ASP.NET videos!

[@RahulNath]

Glad you like it Vishal. Do check out my full series here kzbin.info/aero/PL59L9XrzUa-nqfCHIKazYMFRKapPNI4sP and drop in here if you have any suggestions or topics to be covered.

[@volodyakachalka5187]

The first video, that describes filters in appropriate way, thanks

[@RahulNath]

Glad you think so! There is also a follow up video on Filters and more in my ASP Series here bit.ly/asp-net-core-series

[@deepakmitawa8106]

really appriciate your effort, you are always value of your audicance time by making point to point, clear. good job!

[@RahulNath]

Glad you are liking them Deepak -The Full ASP NET series is here bit.ly/asp-net-core-series

[@parag_]

One of the best explanations on this topic. The way the example was conducted was easy to follow and spot on. Thanks!

[@RahulNath]

Thank you Parag!

[@FlorinAsavei]

Thank you Rahul! Very well explained. This is my new favorite channel now!

[@RahulNath]

Happy to hear that! And thank you for becoming a member and supporting me 😍

[@aikidoshi007]

Nice one Rahul. It does help if one understands the middleware pipeline, it's great stuff. I look forward to seeing what we can actually do with these.

[@RahulNath]

Thank you Steve!

[@Azcraz]

Killer video as always! Keep the ASP.NET API vids coming!! 🖥

[@RahulNath]

Thank you for the motivation. Sure yes more to follow!

[@MNewful]

Thanks so much Rahul! Your videos are really helpful. Keep them coming.👍🙏

[@RahulNath]

So happy to hear that! Thank you 😀

[@rickyrick6901]

Extremely well explained !! Awesome pedagogy ! Thanks a lot.

[@RahulNath]

So nice of you and glad it helps. Do check out the ASP Series bit.ly/asp-net-core-series

[@michaelkoss]

Rahul, I just found your videos a few days ago and I love them. You present everything so clearly. I wish all programming videos were this well made! You’ve earned yourself a subscriber and I’m going to tell my whole team about your channel. Keep up the excellent work, my friend!

[@RahulNath]

Thank you Michael for such a lovely comment. It's made my day and thank you for sharing it with your team. Do let know if there are specific topics or areas you are looking for and I can try and cover them.

[@sbmqureshi77]

Thanks rahul for this video me understand concept of filter and order which is most important, I was always confused on middleware and filter but now I am cleared

[@dy0mber847]

Only a few people on whole youtube are able to produce such useful and understandable content. Thank you a lot, sir ❤

[@RahulNath]

Thanks a ton!

[@wlickez]

Excellent, this video helped me a lot...I am from Guatemala, and you made I finish a pendient task

[@RahulNath]

Glad it helped William! Do check out the full ASP NET Series here bit.ly/asp-net-core-series There is also a second part to the Filters video kzbin.info/www/bejne/oaLam6WAadCVb7M

[@ashutoshsingh5568]

Rahul my brother… your explanation is simply awesome and clean. God bless you for this wonderful series. Keep posting such useful contents.🙂 Thanks a ton.🙏🏽

[@RahulNath]

Thanks a ton Ashutosh. Extremely happy to hear this. Do let know in case you have any topic suggestions|

[@coding-gemini]

Just came across this video, Excellently explained, keep up the great work, Subscribing to your channel.

[@RahulNath]

Welcome aboard Mithun and thank you for subscribing! Do check out the full ASP NET Series here kzbin.info/aero/PL59L9XrzUa-nqfCHIKazYMFRKapPNI4sP I am sure you will like them.

[@abhijoydas4478]

This is a ideal kind of a video. When you don't want to follow Microsoft Docs. Good Work 👌

[@RahulNath]

Glad you liked it Abhijoy!

[@TheThila]

Thanks Rahul , Your expiation is simple and understandable ....... great work

[@RahulNath]

Thank you and happy you like it! Do check out part 2 of this video and more videos in this playlist bit.ly/asp-net-core-series

[@cristobalfuentealbaflores775]

Thanks a lot Rahul, you simplified my understanding a lot

[@RahulNath]

Glad it helped Cristobal ! Do check out the second part to this video here kzbin.info/www/bejne/oaLam6WAadCVb7M and the full ASP Series if you haven't already bit.ly/asp-net-core-series

[@Kosiarz101]

Your videos are very informative. Thanks!

[@RahulNath]

Glad you like them and hope you are enjoying the full series bit.ly/asp-net-core-series There is also a part 2 for the Filters - kzbin.info/www/bejne/oaLam6WAadCVb7M

[@vinothkumar-eh2gw]

Thanks Rahul for your amazing work i totally loved it

[@RahulNath]

Thank you Vinoth!

[@nvnsyaswanth]

Awesome anna. I happened to see 5:04 am on your console. Waking up early and making these videos. Hats-off yo your dedication :)

[@RahulNath]

Thank you so much yaswanth 😀 Yes all videos are recorded between 4-6 (time when house is most quiet). I had written about this here twitter.com/rahulpnath/status/1393992168579104773?s=20

[@ivanpesenti1138]

Amazing explanation Rahul. Thank u for the kind job. Keep posting 😉

[@RahulNath]

Thank you Ivan. Happy to see your comment again! 😀

[@ivanpesenti1138]

@@RahulNath my pleasure 😁

[@RajivNanda100]

I think you have covered the way, really got overall idea about the filter in .NET Core. You are doing a great job and you earned a subscriber as well :D . Can you please upload video on Authorization and Authentication in Web API and more specifically on OAuth, Open Id and JWT Token combinely that would be really helpful for me and for others as well. Because I didn't find anyones video helpful in youtube.

[@RahulNath]

Thank you Rajiv. Had you come across this one here kzbin.info/www/bejne/j3i4mKCNmZ6rl9k The full ASP NET Series is available here kzbin.info/aero/PL59L9XrzUa-nqfCHIKazYMFRKapPNI4sP Do let me know if there is anything more/specific you are looking for.

[@asd22522]

thanks for this video :)

[@akusa03]

Excellent tutorial.

[@RahulNath]

Thank you Ella. Do check out the full series here bit.ly/asp-net-core-series There is also a second part to the Filters video.

[@raagasongs]

Thank you Rahul.. I have seen your name in Microsoft .Net core documentation contributor list... I'm really happy about you.. keep it up.. post the video like this that would hep more people like me..

[@RahulNath]

Thank you Rajesh! Haha yes my name does come up in the documentation mostly because I raise tiny PR's fixing typos and some times bugs that I find when reading for these video prep. If you see a error in the docs when you read, do raise a PR. The process is straightforward. But if you are finding it hard, let me know and I can do a video showing how.

[@raagasongs]

@@RahulNath Sure..

[@karthikbalasubramanya]

Excellent...thanks

[@RahulNath]

Most welcome and happy you are liking them. Hope you are enjoying the full series bit.ly/asp-net-core-series

[@rohan4rich]

Great ! all doubts cleared .

[@RahulNath]

That's awesome Rohan!

[@mdabuzar2130]

Much awaited

[@RahulNath]

Sure yes, Thank you. More ASP NET Core and Azure videos coming!

[@kumar_codes]

It's very Very helpful Rahul.....

[@RahulNath]

Thank you Pritish. Do check out the second part this video too - kzbin.info/www/bejne/oaLam6WAadCVb7M

[@radhikarathi8597]

Good explanation

[@sarveshdeore9677]

Very informative 👍

[@RahulNath]

Glad you think so! Do check out the ASP series bit.ly/asp-net-core-series

[@seewhatseeabc]

woah bro just saw your video. fking clear, you dont beat around the bush

[@RahulNath]

Great to hear that. Do check out the full series here bit.ly/asp-net-core-series I'm sure you'll love it!

[@siddharthdilpak7359]

Perfect 👍🏻

[@RahulNath]

Thank you! Cheers Siddharth!

[@adnanzaka2696]

very informative and to the point video for each topic. way to go..keep it up. one suggestion though. it will be very nice if you suggest the book as well to get into the more details if someone wants to.

[@RahulNath]

Glad you like it Adnan. As for books these contents were from the MS documentation and doing some self playing around with code. But will keep in mind to call out relevant books in case there are any. I do have some suggestion over at my blog here www.rahulpnath.com/blog/language-agnostic-books-for-every-developer/ www.rahulpnath.com/blog/language-agnostic-books-for-every-developer-2/

[@gilbermonsalve3897]

Thank you!

[@RahulNath]

Glad you like it! The second part to this video is there kzbin.info/www/bejne/oaLam6WAadCVb7M

[@ice12328]

Excellent Sir

[@RahulNath]

Thank you Karthikeyan and hope you are liking the series bit.ly/asp-net-core-series

[@ramashankar2750]

Coding close to Half a century, You bring in great clarity to an architect, Have a tiny suggestion to Persist the workflow with progressive changes on the screen near to your delivery PIP. e.g Sync/Async, Scoping/Order, Attribute/Method, e.g I plan to use it code path mining log for use in Live Runtime Trace (part of our app)

[@RahulNath]

Thank you for your comment and you are liking it ! Are you looking for KZbin timestamps so that you can easily navigate between different sections in the video?

[@ramashankar2750]

@@RahulNath That would be good if multi level topic dissemination is facilitated aka hierarchical across links not to the scale of wiki.

[@ramashankar2750]

Have a brush with Suzuki style of Learning violin, you will come to terms with the presentation style. Incidentally i am from chennai and a local entrepreneur for decades.

[@RahulNath]

Thank you for pointing out the Suzuki style. Haven't come across it, will check it out!

[@raminquliyev2268]

Perfect video.

[@RahulNath]

Thank you Ramin!

[@sirpasricharan4986]

Hi Rahul, Thanks for amazing video, please make videos on Design Patterns. Thanks!

[@RahulNath]

Thank you Sirpa and glad you like it. Yes I will start doing a mix of patterns. Thank you for the suggestion here and also in the poll 😀

[@anurag3487]

very good explanation Rahul, appreciate your efforts. I would like to request one feature though - once you explain the concepts, can you please also create a small bite sized real time example too? It would help more. I will have to see all the videos in your ASP.NET Core series. Thanks again.

[@RahulNath]

Great suggestion Anurag. I might do a video showing different real life examples of these building blocks. Do let me know your thoughts on the videos once you get a chance to watch. Such comments are extremely valuable. Thank you!

[@anurag3487]

@@RahulNath sure. You taking out the time to listen to your subscribers is commendable. I really learn a lot from your videos.

[@RahulNath]

@@anurag3487 Thank you, Anurag. I will look out for your comments on the other videos 😀

[@karthikbalasubramanya]

Excellent videos Rahul...please make some vedios on caching techniques...

[@RahulNath]

Thank you Karthik for the suggestion. I've added it to my list!

[@shashikiran5388]

Wonderful videos. Never saw anything better than this series on the CORE, I add one to your subscribers count. I am looking for 'How to convert/redirect/implement Https from Http' in the CORE WEB API. Could you please make one?

[@RahulNath]

Glad these helped Shashi and thank you for the suggestion. Here is my ASP Series bit.ly/asp-net-core-series

[@abhaypatil7653]

Awesome

[@RahulNath]

Glad you liked it Abhay!

[@rahulsaud8583]

Hi, I am also Rahul, Canada. I checked your About Me page and found nice chemistry with your name and your son's name. Like that. (I am from Nepal)

[@RahulNath]

Hey Rahul 👋 Haha yes son's name is inspired from Buddha. yes only that the names are opposite in our case. thank you for the comment 😀

[@imranekberli2933]

Thanksss

[@RahulNath]

You're welcome Imran! Check out the series here bit.ly/asp-net-core-series

[@ksdvishnukumar]

Hi Rahul, Its crisp and clear.. thanks for your effort👍 Just one question, Is it possible to use a ILogger object inside the filter which the object is created in the Controller level through Constructor dependancy injection?

[@RahulNath]

Happy you like it! Yes Filters supports DI. I will be covering in the next follow up video.

[@ksdvishnukumar]

@@RahulNath Thanks Rahul.. Cheers!!!!

[@RahulNath]

@@ksdvishnukumar 😀

[@RahulNath]

@@ksdvishnukumar Here you go - kzbin.info/www/bejne/oaLam6WAadCVb7M. Do let me know your feedback!

[@alhassenhamdy]

What's up man just found out your channel. looks really good Do you think you can organise your content in playlists like make all AWS together and asp core Videos together, or is that much work for you at the moment?.

[@RahulNath]

Glad you like it Alhassen. The videos are already in playlists. If you are unae to find them here check out my blog landing page which points you to it . Let know if you need more help. www.rahulpnath.com/

[@RahulNath]

Here you go ASP NET Core Series - kzbin.info/aero/PL59L9XrzUa-nqfCHIKazYMFRKapPNI4sP Azure DevOps Series - kzbin.info/aero/PL59L9XrzUa-m7AFDgjWuwm6exyCklc03U AWS Series - kzbin.info/aero/PL59L9XrzUa-kl89ThijziX03fgTrbZCd7

[@alhassenhamdy]

@@RahulNath wow thank you very much for taking the time. I see the playlists now but for some reason KZbin told me there were no playlists on this channel when i first looked, i don't know why that happened.

[@alhassenhamdy]

Nice website btw

[@RahulNath]

​@@alhassenhamdy Cool no worries! and glad you like it 😀 Do let me know if you have any feedback on the content or looking for specific topics.

[@sharadpawar4047]

Nice Explanation....Then What is the difference between Middleware and Filter ? Which one to use?

[@RahulNath]

Thank you Sharad and great question. It is well explained in this SO question stackoverflow.com/questions/42582758/asp-net-core-middleware-vs-filters Mostly depends on what scenario you are looking to use this. Let me know if you need further help or have a specific scenario you are looking at.

[@amanshukla6500]

When to choose filters or middleware ?

[@adilrizvi6313]

Can you please make some practical videos on microservices and their interaction?

[@RahulNath]

Good suggestion - I will Adil. Trying to get to it, been a long time ask on this channel

[@adilrizvi6313]

@@RahulNath thnks. You are doing great..

[@RahulNath]

@@adilrizvi6313 Thank you!

[@parinitajha9416]

Hi Rahul, tell me sequencing of filter are same as mvc in asp. Net core. If it's yes, if I register the custom filter on controller level and action level and I put the order attributes on controller level is 2 and on action is 1. Which one is excuting first? According to my logic, filter will be excuted on behalf of order no.

[@parinitajha9416]

Pl ans this qns...

[@RahulNath]

Sorry for the delay - I guess you are right. Can't tell right from the top of my head. Did you give it a try and see what's happening?

[@parinitajha9416]

@@RahulNath yes I did..

[@RahulNath]

@@parinitajha9416 Nice - were you able to confirm ?

[@parinitajha9416]

@@RahulNathjust before 2 days, I tried to implement it.. Filters will b excuted on the basis of order no...

[@kresnofatihimani5073]

is there a way to skip the action if a certain condition is not met? why does IActionFilter.OnActionExecuting not have actiondelegate as param while IAsyncActionFilter.OnActionExecutionAsync does? I want to bypass action if it doesn't have some headers etc.

[@RahulNath]

Is it possible to write that code within the filter and avoid doing whatever you need if the header is not set?

[@vchirilov]

How swagger gets available by default? You said it is configured by default... I used to configure it manually. Can you explain which template you use with swagger configured?

[@raagasongs]

.NET Core 5 provides inbuild swagger with configuration.

[@RahulNath]

I use the web API template for this example Creating it at 1:40 docs.microsoft.com/en-us/dotnet/core/tools/dotnet-new#webapi But yes I also do explicitly set it up for certain other templates and also have automatic type generation for frontend. If you are interested check it out here kzbin.info/www/bejne/aYbPdJSBbs59l6s

[@RahulNath]

@@raagasongs Thank you Rajesh!

[@TheMasterAbdul]

Very nice but whats the main usage of filters??? Isnt same as middleware???

[@RahulNath]

This link here has some good differences listed out stackoverflow.com/questions/42582758/asp-net-core-middleware-vs-filters Also check out the Middleware video and you understand it better kzbin.info/www/bejne/a5bMl3ttgaqhfdE Let me know if you have additional questions.

[@nishanths3542]

Hi Rahul, I like to get a help from you. I have used Action filter for validate request model is empty ( specially when I give request as [] or {}). Try this code: ----- Context.ActionArguments.Any(x => x.value == null) ------ But it is not working since I'm getting default value with model with property assigned with defaults like { name : string, address: string } even my request is empty as {}.

[@RahulNath]

Thank you Nishanth. I did not fully understand the question. Can you provide more details and let know what you are trying to achieve as well for more context?

[@stdeepak22]

Brother, you can blink your eyes sometime. it doesn't impact tutorial quality. ;)

[@RahulNath]

Haha totally, blink three times and talk next time 😂 I guess most of them are going in the edits and also I am still getting better with the camera. Glad you are liking the content Deepak 😀

[@stdeepak22]

@@RahulNath no doubt in that. I like you content.. tutorials are helpful..

[@RahulNath]

@@stdeepak22 Thank you!!

[@pramod.kulkarni9607]

Try to make video on Microsoft teams bot app

[@RahulNath]

Thank you for the suggestion Pramod!

[@techpc5453]

[@RahulNath]

👍bit.ly/asp-net-core-series