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Resolved Generate QR Code in datawindow

  1. How-to
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  1. mathews rutto
    mathews rutto
  2. PowerBuilder
  3. Tuesday, 9 June 2020 05:19 AM UTC

Hello,

I want to generate a QR code in a datawindow. I have design a freeform dataobject in form of a report so i want to add QR code at the footer of my report.

How can i achieve this?

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Accepted Answer
Marco Meoni
Marco Meoni Accepted Answer Pending Moderation
  1. Tuesday, 9 June 2020 07:30 AM UTC
  2. PowerBuilder
  3. # Permalink

Hi Mathews,

you can find plenty of 3rd part OLE or NET libraries. Personally, I prefer to go for Google API.

For example,

1) format the URL according to the API, here I want a 230x230 GIF:

http://chart.apis.google.com/chart?cht=qr&chs=230x230&chof=gif&&chl=Hello Google, this is PB 2019 R2&choe=UTF-8&

2) send the request to Google (use PB HttpCient, iNet, etc)

3) receive the response and display the QR blob into a picture control with SetPicture()

Best,

.m

 

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mike S
  1. mike S
  2. Tuesday, 9 June 2020 13:56 PM UTC
"example code"

copy the link that he provided and paste it into a browser
  1. Helpful
Marco Meoni
  1. Marco Meoni
  2. Tuesday, 9 June 2020 20:35 PM UTC
Indeed, the link should be self explanatory.

But if also need an example about how to send the HTTP request and receive the picture, take this one:



https://docs.appeon.com/appeon_online_help/pb2019r2/powerscript_reference/ch10s311.html



(use GetResponseBody(lblb_blob) to download the picture)



Best,

.m

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mathews rutto
  1. mathews rutto
  2. Wednesday, 10 June 2020 05:35 AM UTC
Thank you it has worked,

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Responses (2)
O E
O E Accepted Answer Pending Moderation
  1. Friday, 12 June 2020 09:12 AM UTC
  2. PowerBuilder
  3. # 1

Hello,

I'm facing the same problem. I'm able to receive the blob from Google-API. I can show the qr-code in a window per picturobject.

Code: p_1.setpicture(lbl_body)

But how to show the qr-code in a datawindow for printing?

Comment
Marco Meoni
  1. Marco Meoni
  2. Sunday, 14 June 2020 08:25 AM UTC
Hi,

use the Bitmap() function in a computed expression and pass the filename, where you have stored the blob beforehand, as argument.

Best,

.m
  1. Helpful
O E
  1. O E
  2. Monday, 15 June 2020 07:40 AM UTC
Thanks or your reply. I do not have an physical file. I have to the show the blob/picture without saving it as physical file..
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a s
  1. a s
  2. Wednesday, 22 November 2023 12:34 PM UTC
Did you find a solution to your case??
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