Dropdown list default

[ngct]

Hi All, in my app, there is a dropdown function.

May I ask is there a way to achieve the below, 

Default value: ThisItem.ID

Dropdown list: ["A","B","C"]

In this case, I have no much idea where the ["A","B","C"] should be put.

Many thanks if you have any idea on this.

[poweractivate]

@ngct 

As @WiZey says, you should check on Default property where you defined ThisItem.ID

I don't know what ThisItem.ID is in your case, but if you are using SharePoint's out of the box ID, then the out of the box ID will actually be a number, it will never be A, B, or C.  If that's the case, the Default set to ThisItem.ID will have no effect.

Make sure that the actual formula that you have for Default, whether it's ThisItem.ID or anything else, is something that actually returns the value of either A, B or C. Or, you can also change the ["A","B","C"] to be more inclusive of the possibilities of what the "Default" could be.

In my sample app, "ABRACADABRA", notice how sometimes I have letters like "R" in there. Letters like that have no effect and translate to "A" in my sample app because "R" is not "A","B",or"C". Similarly, a number like "1","2","3" or any other number is not "A","B",or"C" and thus you'll see the default staying at "A".

Check if it helps @ngct.

[ngct]

@poweractivate , I have followed your sample and apply to my model. It is brilliant and working.
I think I made some mistakes on the steps before.

Really appreciated with your detailed instructions and sample app!! It is really helpful