1

I am trying to figure out how to add to this wrapper class.

public class Invoice {

public String Type;
public LineItem[] LineItems;


public class LineItem {
    public String ItemCode;
    public Decimal LineAmount;  //600

}


}

I can initiate the Invoice List easily with

  Invoice newInvoice = new Invoice();

Then I can add to that list:

  newInvoice.Type = 'Sample';

However, how the heck do I add the multiple line items in the sub list??? This was my guess, but it's wrong:

 newInvoice.LineItem[0].ItemCode = '1234';
3

You can create new instance of LineItem first like below since LineItem is a child class of Invoice so you have to use Invoice.LineItem to initialize the class

Invoice.LineItem  lineItem1 = new Invoice.LineItem();
lineItem1.ItemCode = 'item1';
lineItem1.LineAmount = 10;

Invoice.LineItem  lineItem2 = new Invoice.LineItem();
lineItem2.ItemCode = 'item2';
lineItem2.LineAmount = 20;

Invoice.LineItem  lineItem3 = new Invoice.LineItem();
lineItem3.ItemCode = 'item3';
lineItem3.LineAmount = 30;

After that create a new instance of Invoice class and after that add into its variables type and LineItem

Invoice newInvoice = new Invoice();
newInvoice.Type = 'Sample';

 newInvoice.LineItems.add(lineItem1 );
 newInvoice.LineItems.add(lineItem2 );
 newInvoice.LineItems.add(lineItem3 );

Updates

You have receive an error because newInvoice.LineItem is null at the starting point.

So before adding the item to the list you have initialize the like

 Invoice newInvoice = new Invoice();
 newInvoice.Type = 'Sample';
 newInvoice.LineItems = new List<Invoice.LineItem>();
 newInvoice.LineItem.add(lineItem1 );
 newInvoice.LineItem.add(lineItem2 );
 newInvoice.LineItem.add(lineItem3 );
  • Thanks for that was what I wanted. I found that I hit a null error when adding the line items so I added an empty line like follows before adding them (ugly I know, I don't know what the problem was though: Invoice.LineItem EmptyLine = new Invoice.LineItem (); newInvoice.LineItems = new Invoice.LineItem[]{EmptyLine}; – Daniel Howell Oct 16 '17 at 20:39
  • @DanielHowell check the updated answer – Ratan Paul Oct 16 '17 at 21:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.