Dynamics AX, How to post an invoice / packing slip / confirm for multiple orders

Here is the code to post multiple orders invoices or packing slip at once.

If you want to post only a subset of the quantities of each row just change the deliverNow/invoiceNow field of the salesId and set the proper specQty enum value

   SalesFormLetter salesFormLetter;  
   QueryRun queryRun;  
   Query query;  
   ;  
   ttsbegin;  

   salesFormLetter = SalesFormLetter::construct(DocumentStatus::PackingSlip);  
   salesFormLetter.transDate(systemdateget());  
   salesFormLetter.specQty(SalesUpdate::All);  
   salesFormLetter.printFormLetter(false);  
   salesFormLetter.createParmUpdate(false);  
   salesFormLetter.sumBy(AccountOrder::Account);  

   query = new Query(QueryStr(SalesUpdate));  
   query.dataSourceTable(tablenum(SalesTable)).addRange(fieldnum(SalesTable, SalesId));  
   queryRun = new QueryRun(query);  
   salesFormLetter.chooseLinesQuery(queryRun);  

   queryRun.query().dataSourceTable(tablenum(SalesTable)).findRange(fieldnum(SalesTable, SalesId)).value('A15000438');  
   salesFormLetter.chooseLines(null, true);  

   queryRun.query().dataSourceTable(tablenum(SalesTable)).findRange(fieldnum(SalesTable, SalesId)).value('A15000439');  
   salesFormLetter.chooseLines(null, true);  

   // insert here other orders  
   // ...  

   salesFormLetter.reArrangeNow(true);  
   salesFormLetter.run();  

   ttscommit;