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Powerapps - Duplicate checking in Collection

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Posted on by CU14010518-0

34

Hi

How to do the duplicate validation between selected value and the value in collection?

Expected result: Display error message as per below image upon clicking "+" icon when Selected Material (dropdown list) = Material in Collection (Data table)

Thank you.

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Building Power Apps

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Chris-D 1,246 on at

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Hi @jshuang, you can do this by trying to look up the value from the collection and seeing if it's blank.

If( !IsBlank( // Try to look up from collection LookUp( MyCollection, // Your dropdown is called Dropdown, and Selected.Text is the text displayed in it Material = Dropdown.Selected.Text ) ), ... the item is duplicated ... , ... this item is not duplicated ... )

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