How to get multiple selected records in control level event handlers in D365FO / AX 7

Purpose:

The purpose of this document is to show how to get multiple selected records in form control event handlers. 

Development:

First of all create new event handler class HRPayrollPayStatementEventHandler and subscribe to form button OnClicked event handler.

/// <summary>

/// The <c>HRPayrollPayStatementEventHandler</c> class is the event handler class for managing PayrollPayStatement form events

/// </summary>

class HRPayrollPayStatementEventHandler

{

   

    /// <summary>

    /// Click event handler

    /// </summary>

    /// <param name="_sender">Form control buffer</param>

    /// <param name="_e"> Event args</param>

    [FormControlEventHandler(formControlStr(PayrollPayStatement, CustomButton), FormControlEventType::Clicked)]

    public static void SLD_CustomButton_OnClicked(FormControl _sender, FormControlEventArgs _e)

    {

        FormDataSource    PayrollPayStatement_DS = _sender.formRun().dataSource(formDataSourceStr(PayrollPayStatement, PayrollPayStatement));

        MultiSelectionHelper    selectionHelper = MultiSelectionHelper::construct();

        PayrollPayStatement     payStatement;

        selectionHelper.parmDataSource(PayrollPayStatement_DS);

        payStatement  = selectionHelper.getFirst();

        if (payStatement.RecId)

        {

            while (payStatement.RecId != 0)

            { 

                info (payStatement.DocumentNumber);

                payStatement = selectionHelper.getNext();

            }          

        }

    }

}