Object not initialized error when looping over a List in Dynamics AX?

Question

The Problem:

I have a list with Objects as elements.
I use enumerator to loop over the list.
While looping I assign elements to a variable object with the same type as the element.
When I call a method on the object, but I get the following error-message:

MyClass object not initialized.

I think I must cast, but don't know how to do this in Dynamics AX.

I develop in MS Dynamics AX 2012.

MyExampleDataContract exampleDataContract = new MyExampleDataContract();
while (listEnumerator.moveNext())
{
    exampleDataContract = listEnumerator.current();
    info(exampleDataContract.parmCustomerId()); //This gives an error.
}

`exampleDataContract = listEnumerator.current() as MyExampleDataContract;` Your new is not needed. — Jan B. Kjeldsen, Apr 26 '12 at 09:46
Now it says: The type current must designate a compatible class, an interface, or a table. — Tassisto, Apr 26 '12 at 10:02
I used the Debugger and I noticed that the listEnumerator is not uninitialized — Tassisto, Apr 26 '12 at 11:08

score 2 · Accepted Answer · answered Apr 26 '12 at 09:07

2

A list element can be null.

List l = new List(Types::Class);
;
l.addEnd(null);
info(int2str(l.elements()));

answered Apr 26 '12 at 09:07

Jan B. Kjeldsen

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Tassisto · Answer 2 · 2014-01-20T07:34:29.237

1

The solution was: Before inserting elements in the list they should be instantiated first.

for (counter = 1; counter <= 3; counter++)
{
    exampleDataContract = new MyExampleDataContract(); // This is what I missed :)
    exampleDataContract.init("DEV-000000000" + int2str(counter));
    myList.addEnd(exampleDataContract);
}

edited Jan 20 '14 at 07:34

answered Apr 27 '12 at 06:50

Tassisto

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Object not initialized error when looping over a List in Dynamics AX?

2 Answers2