What would be the best method in validating data from an excel sspreadsheet through power apps?
Try this video: PowerApps Conditional Formatting and Popups
I show you how to use IsMatch() function to do some validation and how to pop up warning text if they get things wrong.
Nope. In that case I would create some logic that does a Lookup in the table for the new value. If your lookup comes back IsEmpty then you know you are all set.
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