Number sequences are unique identifiers that can be associated with a master record so that they can be individually distinguished. They can be either formatted as alpha-numeric strings or simply as numbers.

Microsoft Dynamics AX 2012 provides an easy to implement framework to generate custom number

sequences.

Scenario

As part of this tutorial, a custom number sequence will be generated for the Customer Groups setup form (Accounts receivable à Setup à Customers à Customer groups)

Steps

First create a new Extended Data Type (EDT). Open AOT àData Dictionary à Extended Data Types
Right Click on Extended Data Types and create a new EDT NumSeqDemoCustGroupNum of type String

Set the properties as shown below

Now go to AOT à Classes and open the NumberSeqModuleCustomer class by right clicking it and selecting View Code

In the loadModule method, add the following code after the last line of code

//customer group number

//define the EDT

datatype.parmDatatypeId(extendedTypeNum(NumSeqDemoCustGroupNum));

//define its default propertiesdatatype.parmReferenceHelp(literalStr(“Unique number for customer group”));datatype.parmWizardIsContinuous(true);datatype.parmWizardIsManual(NoYes::No);datatype.parmWizardIsChangeDownAllowed(NoYes::No);datatype.parmWizardIsChangeUpAllowed(NoYes::No);datatype.parmWizardHighest(999999);datatype.parmSortField(27);

//define its scope

datatype.addParameterType(NumberSeqParameterType::DataArea, true, false);this.create(datatype);

Now, go to AOT à Jobs and create a new job loadNumSeqCustDemo

Write the following code in the job and then run it

static void loadNumSeqCustDemo(Args _args){
//define the class variableNumberSeqModuleCustomer seqMod = new NumberSeqModuleCustomer();

//load the number sequences that were not generatedseqMod.load();}

Now, go to Organization administration à Common à Number sequences à Number sequences

Click on Generate button in the New button group

In the Setup number sequences wizard, Press Next

In the Setup set different values for the number sequence like the format, highest value and lowest value
Click Next

In the last step, Click Finish to generate the number sequences

The number sequence is generated and can be used on the Customer Groups form
Open AOT à Data Dictionary à Tables à CustGroup
Add a new String field and set the properties as follows

Add the newly added field in the Overview field group

Now go to Forms àCustGroup and restore the form. It will add the newly added field in the grid

Write the following code on the Class declaration node

NumberSeqFormHandler numberSeqFormHandler;

Create a new method on the form and write the following code

NumberSeqFormHandler numberSeqFormHandler(){
if (!numberSeqFormHandler){

//create a reference of number sequence form handler class specifying the EDT, Data source name and the field of the table

numberSeqFormHandler =NumberSeqFormHandler::newForm(NumberSeqReference::findReference(extendedtypenum(NumSeqDemoCustGroupNum)).NumberSequenceId, element,CustGroup_DS,fieldnum(CustGroup,CustGroupNumber));}return numberSeqFormHandler;
}

Override the close method of the form and write the following code

public void close(){
if (numberSeqFormHandler)
{numberSeqFormHandler.formMethodClose();}

super();}

Override the create method on the CustGroup data source and add the following code

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

super(_append);

element.numberSeqFormHandler().formMethodDataSourceCreate(true);}

Override the write method on the CustGroup data source and add the following code

public void write(){
super();

element.numberSeqFormHandler().formMethodDataSourceWrite();}

Override the validateWrite method on the CustGroup data source and add the following code

public boolean validateWrite(){
boolean ret;

ret = super();

ret = element.numberSeqFormHandler().formMethodDataSourceValidateWrite(ret) && ret;

return ret;}

Override the delete method on the CustGroup data source and add the following code

public
void delete(){

element.numberSeqFormHandler().formMethodDataSourceDelete();

super();}

Override the linkActive method on the CustGroup data source and add the following code

public
void linkActive(){

element.numberSeqFormHandler().formMethodDataSourceLinkActive();

super();}