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Cascade dropdown for LookUp type of column

Hi all,


I hope someone can help me with cascading dropdown query. I have a Lookup type column called "Milestone A" in sharepoin list called "Key Cross-Project Dependencies". It's bringing column "Title" from list called "Consolidated Milestones".


What I want is to restrict list of items, showing in dropdown, based on "Project" selected in ComboBox. I manage to retrieve this filtered list into a dropdown using this formula in item property


Filter('Consolidated Milestones', 'Project Title' = ComboBox3.Selected.'Project Title').


Problem is that when I submit the form, column "Milestone A" is not getting updated. I guess it has something to do with fact that I haven't used list "Key Cross-Project Dependencies" as a source in item propery of that dropdown.


Is there anyone who can help me out here? I would be gratefull for any advice / guidance.


Many thanks.




Accepted Solutions
New Member

Similiar issue is described here
Also solutions is there.

View solution in original post

Resolver II
Resolver II

hi @Anonymous 


working from memory here. 


I think you can do something like: 


Filter('Key Cross-Project Dependencies'.'Milestone A', 'Project Title' = ComboBox3.Selected.'Project Title')

Let us know how you get on. 




Not applicable

hi Luke,


many thanks for you help. I tried your formula, but it still seems to need some modification. Formula itself is ok, but when I use it for items propery, the dropdown feature is not working at all. I think it might be because there is no choice command in formula?


Thank you


New Member

Similiar issue is described here
Also solutions is there.

Not applicable

I'll buy you a beer for this one.

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