read standerd Code39

(0) Share

Report

Posted on by acero26

Hi,

I'd like to read standerd CODE 39 (not using full ASCII) with characters like $+%/.

The combination of characters that displays Full ASCII cannot be read alone.

is there any way to read ?

Categories:

Building Power Apps

I have the same question (0)

All responses (6)

Answers (0)

Sort by

v-jefferni Microsoft Employee on at

Like
a
(0)

Report
Copy link

Link copied!

Hi @acero26 ,

Have you tried the Barcode reader control? I didn't find a place in the official documentation that says the original Code 39 is not supported.

Barcode reader control in Power Apps - Power Apps | Microsoft Learn

Best regards,

Was this reply helpful? Yes No
acero26 on at

Like
a
(0)

Report
Copy link

Link copied!

Hi @v-jefferni ,

Thank you for your reply. Yes, I have.

See example,
I woud like to read this barcode "%V". However Power Apps Barcode reader read it as "@".
This is caused ascii, I believe.

Was this reply helpful? Yes No
WillPage 2,339 Super User 2026 Season 1 on at

Like
a
(0)

Report
Copy link

Link copied!

%V is the character encoding for the @ symbol in Code 39 full ASCII. This barcode is being read correctly.

Was this reply helpful? Yes No
acero26 on at

Like
a
(0)

Report
Copy link

Link copied!

I understand the barcode can be read correctly when its value is changed to1234/D.
Can I set full ASCII mode off ? I cannot read a barcode below.

Was this reply helpful? Yes No
WillPage 2,339 Super User 2026 Season 1 on at

Like
a
(0)

Report
Copy link

Link copied!

I think the best you could do is import the table from the wikipedia page on Code39 full ascii and do a lookup against any special characters.

Imagine you have that table in a format like
{"Character": "@", Encoding: "%V",
....}
..and you call it EncodingTable and the barcode value is in Label2

Then you convert the values like this

Concat(AddColumns(
AddColumns(
Sequence(Len(Label2.Text)),
"Letter",
Right(Left(Label2.Text,Value),1)
),"Encoding", Coalesce(Lookup(EncodingTable, Character = Letter).Encoding,Letter),Encoding)

Was this reply helpful? Yes No
acero26 on at

Like
a
(0)

Report
Copy link

Link copied!

@WillPage I appliciate your reply.
Your solution works if I can read a barcode.

However my problem is that I keep scanning it but nothing happened.
It happened only when I tried to scan a barcode that was including $+%/ alone like 1234$ code above.

Was this reply helpful? Yes No