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Barcode reader value to text box

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Posted on by Meemo_Kath

Hello everyone
i am new to powerapp
i am trying to make application with barcode reader to scan barcode on the shelf of medication and view expiry dates stored in my list already and update it
my issue is : I want the barcode reader to show the scanned code in the textbox and conduct searching in gallery and at same time i want the text box to search manually also my medicine name
i tried a lot but nothing success

this is my list

and this is my application

pls anyone can help with the correct formula

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Building Power Apps

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mmollet 3,187 on at

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create a context variable on your screens onvisible property like this:
UpdateContext({scannedValue: Blank()})

Now for your onScan property on your scanner add this:
UpdateContext({scannedValue: First(BarcodeReader.Barcodes).Value})

Now add the variable scannedValue to your text input box or label or wherever you want the scanned value to be seen. If you want it to also search/filter your gallery then you can try the following in the items property:
If(IsBlank(ScannedValue), YourListName, Filter(YourListName, Barcode = scannedValue))
this will show the entire list of the scanned value is blank and will show only matching barcodes if scanned value is not blank

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Parunyu 2 on at

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Hi @mmollet
If(IsBlank(ScannedValue), YourListName, Filter(YourListName, Barcode = scannedValue))
When to put the code and properties ?

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mmollet 3,187 on at

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This would go in the search box as the default text. What it does is it checks if the scannedvalue is blank. If it is blank then it means that we have no scanned anything to search for so we want to show the entire unfiltered list. If there is an object in that scannedvalue then we want to show that in this textinput so that the gallery filters correctly.

Basically the gallery is filtering based on the value in the text input so we are just controlling that. if the scanner wasnt used then the user can type to search but if the scanner was used then it will search/filter based on that scanned value instead. The user can still backspace that and search by their own values as well.

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khanf 2 on at

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Amazin, trying to solve this for last 3 days, no youtube video no google search not even chatGPT had correct solution but yours worked in secounds, thank you so much.

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EricCheungT 2 on at

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Hi @mmollet , I have followed you step but failed on the last one, finally nothing come out after scan the barcode. Could you please let me know which step I did wrong? Thanks in advance. I am very new on Power Apps...
UpdateContext({scannedValue: Blank()}) -> please see capture1.png
UpdateContext({scannedValue: First(BarcodeReader.Barcodes).Value}) -> capture2.png
If(IsBlank(scannedValue),'Business Assets', Filter('Business Assets', Barcode = scannedValue)) -> capture3.png
(My ListName is Business Assets)

Capture3.PNG

Capture2.PNG

Capture1.PNG

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