Adaptive Card fails to process attachment when text includes backslashes

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Posted on by BillyBreathes

It seems like my flows fail when the user includes the character "\" in the text field of the TextBlock of my Adaptive card. I included a function in an attempt to replace backslashes.

    {

      "type": "TextBlock",

      "text": "@{replace(replace(triggerOutputs()?['body/bcappdev_description'], '"', '\"'), '\\', '\\\\')}",

      "wrap": true

    },
 
But it does not appear to work properly. Has anyone ever encountered this error/issue? Any suggestions would be great.
 
I have attached the error message I get when the flow fails. In this particular failed flow, the user submitted a long string of text in the text block with a number of folder paths and strings including multiple backslashes.
 
EDIT: I should add the the end user is the one submitting input to the Text field, so I can't really stop them from submitting backslashes. I need a function to replace them.

Categories:

Building flows

Appdev_Error.png

AppDev_Error2.png

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Nived_Nambiar 18,129 Super User 2025 Season 2 on at

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Hi,

if there is backward slash, replace with \\ , something like below

{ "type": "AdaptiveCard", "$schema": "http://adaptivecards.io/schemas/adaptive-card.json", "version": "1.3", "body": [ { "type": "ColumnSet", "columns": [ { "type": "Column", "width": "stretch", "items": [ { "type": "TextBlock", "text": "Path", "wrap": true } ] }, { "type": "Column", "width": "stretch", "items": [ { "type": "TextBlock", "text": "C:\\Temp\\data", "wrap": true } ] } ] } ] }

This can help !

Thanks & Regards,
Nived N
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BillyBreathes 73 on at

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Unfortunately, the end users are submitting the text in this case, so they do not know to use "\\" and instead it is up to me as the developer to figure out a way to deal with the "\"

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Nived_Nambiar 18,129 Super User 2025 Season 2 on at

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Hi,

Option would be to accept the user input data in single \, and make the power automate flow to replace \ with \\ and insert in adaptive card textblock.

Thanks & Regards,
Nived N
LinkedIn: Nived N's LinkedIn
YouTube: Nived N's YouTube Channel
Blog: Nived Nambiar's Blogs
Found my answer helpful? Please consider marking it as the solution!
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BillyBreathes 73 on at

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Yes, I do have a replace statement in my Adaptive card text block. It looks like this:

@{replace(replace(triggerOutputs()?['body/bcappdev_description'], '"', '\"'), '\\', '\\\\')}

But I cannot figure out why it is still giving me errors.

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Nived_Nambiar 18,129 Super User 2025 Season 2 on at

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Hi,

i could not see the error message properly in screenshot Appdev_Error.png

But if i am right- should you use this expression for replacing \ with \\ ?

replace(triggerOutputs()?['body/bcappdev_description'], '\', '\\')

Thanks & Regards,
Nived N
LinkedIn: Nived N's LinkedIn
YouTube: Nived N's YouTube Channel
Blog: Nived Nambiar's Blogs
Found my answer helpful? Please consider marking it as the solution!
Your appreciation keeps me motivated. Thank you!

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