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Barcode Scan Overwrites existing Value always?

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Posted on by Lennsart

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Hi,

I have an edit form linked to a set of excel tables.

Upon a new entry I want to set one value of a row via a barcode scan. For this I added a barcode scanner doing the following:

OnScan = Set(scanValue, Barcodescanner2.Value)

And the DataCardValue has:

Default = scanValue

For new entries this work.

However if I want to edit this entry it either displays an empty field or uses the "scanValue" from a previous scan.

The goal is to display the value in the excel sheet, however it should be possible to change it with a new scan.

Is this possible and if so how?

Kind regards

Lennsart

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Building Power Apps

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WarrenBelz 156,454 Most Valuable Professional on at

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Hi @Lennsart ,

Make the Default of the control (replace with your field name)

If( !IsBlank(scanValue), scanValue, ThisItem.YourScanCodeFieldName )

then (importantly) at Screen OnVisible put

Set(scanValue,Blank())

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EE-19081314-0 2 on at

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Hi,
I have an app created from a list in SharePoint.
You can add an item to either the list or by the app. When you add it by app, you can scan a barcode.
My problem is that if you go in and edit an item in the app, for example, the name, the IMEI number gets erased.
How do I keep the information that is already in that field?
I'm probably too new to this to follow it correctly because i just get an error .
Hope someone can help me as well! 😅

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