OnActivated form method EventHandler X++ D365FO

Here is a simple snippet of the active method on form by Event handler.

Why use the active method ?

We want to show record in a particular field on a grid when a record is selected.

In my case, we want to display the Department code on Positions:

Human resources -> Positions -> All positions.

The business scenario here is, the human resources officer is more familiar with the Department code. To achieve this, we can add a new field and assign the department code on selection of the record.

Let’s create a class: A form event handler for HcmPosition form.

internal final class HcmPosition_Form_GEMS_Handler
{

}

internal final class HcmPosition_Form_GEMS_Handler
{
 /// <summary>
 ///
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 [FormDataSourceEventHandler(formDataSourceStr(HcmPosition, HcmPositionDetail), FormDataSourceEventType::Activated)]
 public static void HcmPositionDetail_OnActivated(FormDataSource sender, FormDataSourceEventArgs e)
 {
   FormRun form = sender.formRun();
   FormDataSource HcmPositionDetail_ds = form.dataSource(formDataSourceStr(HcmPosition, HcmPositionDetail)) as FormDataSource;
   HcmPositionDetail hcmPositionDetail = HcmPositionDetail_ds.cursor();
   OMOperatingUnit operatingUnit;

   select operatingUnit where operatingUnit.RecId == hcmPositionDetail.Department;

   hcmPositionDetail.OMOperatingUnitNumber = operatingUnit.OMOperatingUnitNumber;
 }

}