Page components
All pages are made up of certain common components. The basic elements of a page object are the page triggers, page properties, controls, control triggers, and control properties.
Page Triggers
The following screenshot shows the page triggers. The Help section Page and Action Triggers provides good general guidance to the event which causes each page trigger to fire. Note that the OnQueryClosePage trigger isn't related to any Query object action.
In general, according to best practices, we should minimize the C/AL code placed in Page triggers, putting the code in a Table or Field trigger or calling a Codeunit Library function instead. ...
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