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Power Platform Community / Forums / Power Automate / can't send an attachme...
Power Automate
Answered

can't send an attachment that's already in b64 stocked in sharepoint in an approval action

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Hello, 

 

I've been trying to send an image from a power app form and use that image as an attachment inside an approval action in power automate. I've managed to stock the image in b64 in sharepoint. Since the attachment field of the approval action in power automate only take b64 input, i passed the b64 code but when the email is send, the attachement can't be opened. The system treats it like an image but can't happen to open it, like a corrupted file. could you help me please ?

 

the code i used in the attachement content field:

 

substring(triggerOutputs()?['body/ImageBinaire'], add(indexOf(triggerOutputs()?['body/ImageBinaire'], ','),1))

 

johnstoneheart_0-1663924031286.png

 

a picture of a part of the b64 code:

 

johnstoneheart_1-1663924201700.png

 

image in the mail that can't be opened

 

johnstoneheart_0-1663924429423.png

 

 

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  • Verified answer
    Ellis Karim Profile Picture
    11,691 Super User 2025 Season 2 on at

    Try wrapping the image content in a JSON object as shown below:

    {
     "$content-type": "image/png",
     "$content": ""
    }

     

    Snag_544a3c5.png

    ekarim2020_0-1663964127033.png

    Example:

    {
     "$content-type": "image/png",
     "$content": "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"
    }

     

    Then use that JSON object for the attachment content:

    Snag_53d53a3.png

    Example runtime output:

    Snag_53e07ef.png

     

    Hope this helps.


    Ellis
    ____________________________________
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