Hallo,
Yes i only use powerapps and sharepoint so far in my app. i want to be able to update the list when i click on 'New' from the customized form.
if these two columns were SLT columns in SP ,then i could change their text input properties from PowerApps as below:
(WorkStreamTextDataCard):
Distinct(WorkStream,Title)
(subworkstreamTextDataCard):
Filter(SubWorkStream, WorkstreamTitle = DataCardValue6.Selected.Result)
where 'WorkstreamTitle' is an additional SLT column in SubWorkStream List!!
However Lookup Columns as they are are giving me a headache!
So I only came to match the Workstream LookUp column in Tasks List to the Title of the SubWorkStream List which is wrong apparently..
ShowColumns(WorkStream,"Title","ID") in PowerApps workstream datacard and
Filter(ShowColumns(SubWorkStream,"Title","Workstream"), Workstream.Value = DataCardValue3.Selected.Title)