Existing Dropdown from a Lookup list to another List.
- Select the DropDown
- Change the Item property Datasource:
//Choices([@’DataSource’].FieldName)
Distinct(‘DataSource’, FieldName) - Change the DisplayFields property to:
From: [“Value”] To: ThisItem.’ThisListFieldName’ - Select the whole datacard
Change Update: ThisListFieldName.Selected.Result
Allow Empty Selection for dropdown list in a canvas app
Have the dropdown box selected -> advanced->Data ->AllowEmptySelection = true