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Programming Microsoft Dynamics 365 Business Central - Sixth Edition

You're reading from  Programming Microsoft Dynamics 365 Business Central - Sixth Edition

Product type Book
Published in Apr 2019
Publisher Packt
ISBN-13 9781789137798
Pages 536 pages
Edition 6th Edition
Languages
Authors (3):
Marije Brummel Marije Brummel
Profile icon Marije Brummel
David Studebaker David Studebaker
Profile icon David Studebaker
Christopher D. Studebaker Christopher D. Studebaker
Profile icon Christopher D. Studebaker
View More author details

Table of Contents (12) Chapters

Preface Introduction to Business Central Tables Data Types and Fields Pages - The Interactive Interface Queries and Reports Introduction to AL Intermediate AL Advanced AL Development Tools Successful Conclusions Assessments Other Books You May Enjoy

Table triggers

To display the triggers with the table open in Visual Studio Code, enter the trigger keyword in the first line after the fields section, followed by Ctrl + spacebar. This is shown in the following screenshot:

The code contained in trigger is executed prior to the event represented by trigger. In other words, the code in the OnInsert() trigger is executed before the record is inserted into the table. This allows the developer a final opportunity to perform validations and to enforce data consistency such as referential integrity. We can even abort the intended action if data inconsistencies or conflicts are found.

These triggers are automatically invoked when record processing occurs as the result of user action. But when table data is changed by AL code or by a data import, the AL code or import process determines whether or not the code in the applicable trigger is executed:

  • OnInsert(): This is executed when a new record is to be inserted in...
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