Why the FormInt64Control created by new() does not have method value?

Finance and Operations/AX Developer Forum
1

I want to know why the FormInt64Control cread by new() does not have method value. For example when I run this code:

static void NewControlTest(Args _args)

{

FormInt64Control FormInt64Control;

FormInt64Control = new FormInt64Control();

FormInt64Control.value(5);

info(FormInt64Control.valueStr());

}

it will end with:

Object object does not have have method ‘value’.

Stack trace …

When the same thing is created on existing form using existing design (in run() for example).

formInt64Control = formGroupControl.addControl(FormControlType::Int64, “”);

formInt64Control.value(5);

will run without problem. I would like to know how it is possible and how it is working behind.
2

If you look at Value property in debugger, you’ll see that it contains an Object instance in the first case and a FormInt64Control instance in the other cases. And Object class really doesn’t have any value() method.

It’s strange, without doubt, and it again shows that type control in X++ has its flaws. It seems that you should never use the constructor directly, even if it throws no error. Instead of that, create an instance by addControl().