D365 Number Sequence Reference

Step: 1. Create new class and extend it to NumberSeqApplicationModule:

public class NumberSeqModuleMP extends NumberSeqApplicationModule
{

    /// <summary>
    ///    Configures all the data types that are being used by the module.
    /// </summary>
    /*
    Detailed description of how to setup references for number sequences can
    be found i method loadModule() on the 'father' class: NumberSeqApplicationModule.
    */
    protected void loadModule()
    {
        datatype.parmDatatypeId(extendedTypeNum(MPDependentId));
        datatype.parmReferenceHelp(literalStr("@MPL:DependentId"));
        datatype.parmWizardIsContinuous(False);
        datatype.parmWizardIsManual(NoYes::No);
        datatype.parmWizardIsChangeDownAllowed(NoYes::No);
        datatype.parmWizardIsChangeUpAllowed(NoYes::No);
        datatype.parmSortField(13);
   
        datatype.addParameterType(NumberSeqParameterType::DataArea, true, false);
        this.create(datatype);
   }

/// <summary>
    ///    Retrieves the ID of the application-specific module for this class.
    /// </summary>
    /// <returns>
    ///    The module-specific ID.
    /// </returns>
    public NumberSeqModule numberSeqModule()
    {
        return NumberSeqModule::MP;
    }

    /// <summary>
    ///    Appends the current class to the map that links modules to number sequence data type generators.
    /// </summary>
    [SubscribesTo(classstr(NumberSeqGlobal),delegatestr(NumberSeqGlobal,buildModulesMapDelegate))]
    static void buildModulesMapSubsciber(Map numberSeqModuleNamesMap)
    {
        NumberSeqGlobal::addModuleToMap(classnum(NumberSeqModuleMP), numberSeqModuleNamesMap);
    }
}

Step: 2. In Param Table of that Module Add below method:

client server static NumberSequenceReference numRefMPDependentID()
{
    return NumberSeqReference::findReference(extendedTypeNum(MPDependentId));
}

Step: 3. Go to the Form where you need to add number sequence:

1. Add Below code to Form Class declaration:

[Form]
public class MyDependentEssEntry extends FormRun
{

    NumberSeqFormHandler numberSeqFormHandler;
}

2. Form Close Method:
void close()
    {
        ;
        if (numberSeqFormHandler)
        numberSeqFormHandler.formMethodClose();
        super();
    }
3. Create Below Method:
NumberSeqFormHandler numberSeqFormHandler()
    {
        if (!numberSeqFormHandler)
        {
            numberSeqFormHandler = numberSeqFormHandler::newForm(MPParameters::numRefMPPayCycle().NumberSequenceId,
                                                                    element,
                                                                    MPPayCycles_DS,
                                                                    fieldNum(MPPayCycles, MPPayCycleID)
                                                                    );
        }
        return numberSeqFormHandler;
    }

4. OverRide Datasource create Method as below:

public void create(boolean _append = false)
{
            element.numberSeqFormHandler().formMethodDataSourceCreatePre();
            super(_append);
            element.numberSeqFormHandler().formMethodDataSourceCreate();
}

public void linkActive()
        {
            element.numberSeqFormHandler().formMethodDataSourceLinkActive();
            super();
        }

public void write()
        {
            super();
            element.numberSeqFormHandler().formMethodDataSourceWrite();
        }

public boolean validateWrite()
        {
            boolean ret;
            ret = super();
            ret = element.numberSeqFormHandler().formMethodDataSourceValidateWrite(ret) && ret;
            return ret;
        }

public void delete()
        {
            element.numberSeqFormHandler().formMethodDataSourceDelete();
            super();
        }