Conversion from UTCDateTime to Date or Time in AX

Here is an example of correct conversion between UTCDateTime value and Date and Time value which is associated with user preferred time zone:
public static void testDateTimeConversion()
{
    utcDateTime dateTime;
    date dateInUserTimeZone;
    TimeOfDay timeInUserTimeZone;

    dateTime = DateTimeUtil::utcNow();

    dateInUserTimeZone = DateTimeUtil::date(DateTimeUtil::applyTimeZoneOffset(dateTime, DateTimeUtil::getUserPreferredTimeZone()));
    timeInUserTimeZone = DateTimeUtil::time(DateTimeUtil::applyTimeZoneOffset(dateTime, DateTimeUtil::getUserPreferredTimeZone()));

    dateTime = DateTimeUtil::newDateTime(dateInUserTimeZone, timeInUserTimeZone, DateTimeUtil::getUserPreferredTimeZone());
}

Sysoperations frameworks Tips and tricks in AX

    protected ClassDescription defaultCaption()
    {
        return "@CashManagement:CashFlowTimeSeriesInitializeControllerCaption";
    }

    public ClassDescription caption()
    {
        return this.defaultCaption();
    }

    /// <summary>
    /// Indicates if the class must run in batch or not.
    /// </summary>
    /// <returns>
    /// Always returns false.
    /// </returns>
    /// <remarks>
    /// This method must be in this class because it is called from the <c>dialogRunbase</c> class.
    /// </remarks>
    public boolean mustGoBatch()
    {
        return false;
    }

    /// <summary>
    /// Determines whether the job can be executed in batch.
    /// </summary>
    /// <returns>
    /// false if the job cannot be executed in batch; otherwise, true.
    /// </returns>
    public boolean canGoBatch()
    {
        return false;
    }

    /// <summary>
    /// Sets whether to show the batch tab or not.
    /// </summary>
    /// <param name = "_showBatchTab">Flag to identify whether to show the batch tab or not.</param>
    /// <returns>False for batch tab to be invisible</returns>
    public boolean showBatchTab(boolean _showBatchTab = showBatchTab)
    {
        return false;
    }
	
	public boolean showBatchRecurrenceButton(boolean _showBatchRecurrenceButton = showBatchRecurrenceButton)
    {
        return false;
    }

Data entities method calling sequence in D365FO

 
EXPORT:
       Entity- postLoad()
       staging - insert()
       Entity- postLoad() - depends on records

IMPORT:
       staging - postLoad()
       Entity - postLoad()
       Entity - initValue()
       Entity - validateField() - depends on no of fields
       Entity - validateWrite()
       Entity - insert() / update()
       Entity - persistEntity()
       Entity - initializeEntityDataSource()
       Entity - mapEntityToDataSource()
       Entity - insertEntityDataSource() / updateEntityDataSource()
       Entity - mapDataSourceToEntity()
       staging - postLoad()

AX 2012:get current client language

get current client language

                                            companyinfo::languageId().