Many ways to validate a field in AL and Business Central

[@BlackTigerAP]

There are special "10 hours" and "24 hours" videos on KZbin... :D Very good to watch before going to sleep. Very hypnotizing.

[@cesarverduzco3903]

Amazing explanation! Thank you! I love the examples, many other videos just explain with theorical things.

[@denisshitov7221]

Interesting video, Erik. Thanks a lot.

[@klauskaan6320]

Bonus content! I love me some late night bonus content!!!!!

[@yahyahussaini]

Hello Erik, I would like to know if it is possible to call an external API to fetch a discount and populate the line discount percentage when an item is added to the sales invoice line. what trigger or code unit should i use in business central. Waiting for your response. Thanks

[@romulusmare]

Thank you Erik!!!! One question though, how do you display the red field error icon when the validation fails? User enters invalid data and error() function will only stop the execution and display on top the error message, but actual BC validation has a red field error icon that gets display when say you enter "abc" in a phone number field which accepts only digits...

[@Hougaard]

That's when it's a "field validation error"....

[@michaelkraithat4852]

Hi Erik, Great video like always, i have a valid question. will you do a video on Customer and Item template where you need to add more fields into the template for auto population and transfer it to the customer / item card. If you can show this one would be Awsome!

[@hmarinov]

Thanks a lot for the detailed video, Erik! I find it especially useful for a newcomers to BC and also really curious to find out on what depends the order of the extensions of the different apps. I just couldn't get what advantages do you find in using Table Extensions triggers, except that you have all the code in one place? In our company we usually use Table Subscribers, so that's why I'm curious what advantages do you find of Table Extension triggers over Table Subscribers?

[@brianthorchristensen5076]

I believe that event subscribers are executed in a different session. So there could be scenarios where you would choose your approach for this reason. But if you are calling your validate trigger by code repeatedly and you are not using a single instance event handler, you can get a performance hit from creating and destroying the event session/codeunit.

[@Hougaard]

Subscribers are not executed in a different session, they are executed in the session that triggers them.

[@Maly_Suk]

Hey, im trying to do some code onaftervalidate of standart page field. Page extends SalesCreditMemo, layout->modify("Sell-to Customer No.")-> trigger OnAfterValidate() ->CODE the problem is it never realy triggers when i change customer on this page..Even debbuger does not work on this trigger.. Code has to do diffrent things for invoice and for CR MEMO. So i can not use trigger on table. Any ideas?

[@Hougaard]

You're sure you're extending the right page?

[@navnav3134]

Dear @eric, Is there any way to validate on all fields without add trigger on validate on each field? Best Regards, NAV

[@Hougaard]

No

[@RaoufIshak]

Hey Mr Erik Hougaard , is There any possibility to use javascript and make a progress bar to ratio field iam trying and couldn't find any solution is there any possibility to help thank you

[@Hougaard]

perhaps....

[@RaoufIshak]

@@Hougaard any solution or idea 💡?