Retrive base64 string from barcode generated from chart.googleapis.com

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Posted on by TJO

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Hi folks,

I'm trying to retrieve the base64 string from a barcode that I retrieve from google and that I display on an image control like so (image property):

"https://chart.googleapis.com/chart?cht=qr&chl=" & varBarcode & "&chs=200x200"

Then, I set the text property of a label control to the image control that displays the barcode. However, it only returns the above string instead of base64 text (The reason for this is that I need the base64 string to generate a PDF report via Powerautomate later).

In contrast, this procedure works for images taken by the camera control.

Is there a way to achieve this without involving Powerautomate?

Cheers

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Building Power Apps

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v-siky-msft Microsoft Employee on at

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Hi @TJO ,

How is PDF generated? Is it converted from HTML?

I don't think you have to convert the barcode to base64 format, since the Barcode image is generated from Google API, and it can also be applied in HTML script via below. You only need to pass the varBarcode to the flow.

"<img src=https://chart.googleapis.com/chart?cht=qr&chl=" & VarBarcode &"&chs=200x200 alt=Barcode>"

Hope this helps.

Sik
TJO 230 on at

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@v-siky-msft Thank you for your reply.
In fact, I apply it to HTML and then convert it to PDF. However, the Image is then broken in the PDF file.
For the camera Images I do the same...just that I apply the base64 to the HTML and the pictures are visible in the PDF.
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v-siky-msft Microsoft Employee on at

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Hi @TJO ,

Yes, you are right. PDF does not recognize HTTPS. But, I believe you can find the answer from @h-nagao in this thread.

Upload the QR code to OneDrive for business using this flow. and then follow the Shane's video to generate the PDF from HTML.

Hope this helps.

Sik