Cascading Dropdowns based on Lookup columns in a SharePoint Form

[WimvanDelft]

Hello,

Since recently it is possible to edit SharePoint forms with PowerApps. Seems to me that with these kind of forms it would be possible to create cascading dropdowns, however the methods explained in other posts (regarding apps) do not work. 

I have 2 lists: "Projects" and "Time Registration". When adding an item to "Time Registration" you select a project and then the dropdown of subprojects should be filtered based on the selected project.

Does anyone know how to create cascading dropdowns?

[Meneghino · Accepted solution]

Assume that you have a TableProj with a column Project and a TableSubs with two columns, Project and Subproject.

Then the Items property of the first dropdown (DropDown1) should simply be:

TableProj

Then the Items property of the second dropdown should be:

Filter(TableSubs, Project=DropDown1.Selected.Project)

That is the basic mechanism.

[WimvanDelft]

Thanks for sending me in the right direction!

Project is a lookup value in the project, so i changed your solution a bit:

Filter(TableSubs; Project.Id=Dropdown1.Selected.ID)

[Meneghino]

Perfect, well done.

Check out my blog for more PowerApps and related info:

https://baizini-it.com/blog/

[WimvanDelft]

Now I got the from working with cascading dropdowns, however the values don't end up in my SharePoint list (this is a third list "Registration") So on the newitems form in registration list one enters his hours and selects project and subproject. Any idea what I'm missing here?

[Meneghino]

Apologies, but I don't use forms.  There should be a setting/property in the form as to what SharePoint fileds the drop downs are connected to.

Otherwise just create your own forms.

[pohlipit]

I have the same issu. Cascading drop-downs work fine based on the values in the lookup list. However on saving the form the values aren't populated into the respective columns of the list that is being edited.

[Meneghino]

If you are using SharePoint, I think this is what you may be looking for:

https://powerusers.microsoft.com/t5/General-Discussion/Solved-patching-to-SharePoint-choice-and-look...

[hysquare]

Please where is the correct answer to this.

I am having similar challenge.

I have three list

Divisions - Title

Groups - Title (Text), Division (Lookup column)

Units - Title (Text), Group (Look column)

I have not been able to implement the cascading dropdown, please assist