Ink Sketch on a Public Form

I would like to save the user signature from the Ink Sketch on a public form to a SharePoint list. I'm trying to follow the article below but it keeps giving a big number instead of the image. What am I doing wrong?

Hello @adasilva,

You need to design a form for SharePoint list using the Plumsail Forms for SharePoint. Please find the instructions here:

Thank you. Is there a way to save the ink sketch with Public Form or with Public Form is not possible?


You can save the signature as an image in Power Automate Flow. Please see the MS instructions.

Hi Margarita,

I tried putting the value from the ink sketch on the formula
base64ToBinary(your_base64_string) but got an error message.

Unable to process template language expressions in action 'Compose' inputs at line '0' and column '0': 'The template language function 'base64ToBinary' was invoked with a parameter that is not valid. The value cannot be decoded from base64 representation.'.

I basically created a variable called vareu, type string and set the value for the plumsail ink sketch.

Then used a compose with the formula base64ToBinary(variables('vareu'))

but it is not working, please advise what I'm doing wrong.

Never mind we figured it out, you have to removed the data:image/png;base64 first.

1 Like