How to check for empty variables in adaptive cards?

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Posted on by PC-16121332-0

I paste JSON from adaptive card designer into my adaptive card in Copilot Studio. I then switch from JSON to Formula in order to use variables in the adaptive card like this.

My problem is that some variables might be empty. What should the syntax be to check for empty values in this case?

{
  type: "TableCell",
  items: [
      {
        type: "TextBlock",
        text: Topic.Record.Status,
        wrap: true
      }
   ]
}

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Artur Stepniak 1,539 Moderator on at

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Hello,

you can use something like: If(IsBlank(Topic.Record.Status), what if blank, what if not blank).

In the meantime - I've just opened a group related to Copilot stuff. Maybe you'd like to join? I plan for it to be the place, where we can help each other. Here's the link: https://community.powerplatform.com/usergroups/details/?groupid=dbc367c2-b7b7-ef11-b8e8-7c1e5259f813.

In case of any other questions, let me know. If the answer helped you, mark it, so that others can benefit from it.

Best regards,

Artur Stepniak

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PC-16121332-0 16 on at

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Thanks @Artur Stepniak, but that does not work. The function itself work but the syntax is not allowed.

Should I use JSON or Formula mode for my adaptive card in Copilot Studio? Can you please update the code in my original question with a working code? I get a syntax error no matter what I do.

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Artur Stepniak 1,539 Moderator on at

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Hello,

I've just created a sample card with an expression:

{

type: "AdaptiveCard",

body: [

{

type: "TextBlock",

size: "Medium",

weight: "Bolder",

text: "${title}"

},

{

type: "ColumnSet",

columns: [

{

type: "Column",

items: [

{

type: "Image",

style: "Person",

url: "${creator.profileImage}",

altText: "${creator.name}",

size: "Small"

}

],

width: "auto"

},

{

type: "Column",

items: [

{

type: "TextBlock",

weight: "Bolder",

text: "${creator.name}",

wrap: true

},

{

type: "TextBlock",

spacing: "None",

text: $"Created {If(IsBlank(Topic.Var1), "IS BLANK", "TEST")}",

isSubtle: true,

wrap: true

}

],

width: "stretch"

}

]

},

{

type: "TextBlock",

text: "${description}",

wrap: true

},

{

type: "FactSet",

facts: [

{

'$data': "${properties}",

title: "${key}:",

value: "${value}"

}

]

}

],

actions: [

{

type: "Action.ShowCard",

title: "Set due date",

card: {

type: "AdaptiveCard",

body: [

{

type: "Input.Date",

id: "dueDate"

},

{

type: "Input.Text",

id: "comment",

placeholder: "Add a comment",

isMultiline: true

}

],

actions: [

{

type: "Action.Submit",

title: "OK"

}

],

'$schema': "http://adaptivecards.io/schemas/adaptive-card.json"

}

},

{

type: "Action.OpenUrl",

title: "View",

url: "${viewUrl}"

}

],

'$schema': "http://adaptivecards.io/schemas/adaptive-card.json",

version: "1.3"

}

Here's the topic:

You can use interpolated string in order to validate it properly: $"{}". I've shown an example above.

In case of any other questions, let me know. If the answer helped you, mark it, so that others can benefit from it.

Best regards,

Artur Stepniak

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Artur Stepniak 1,539 Moderator on at

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And unfortunately I cannot update your code, because you've just sent a part of the card. :-)

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PC-16121332-0 16 on at

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Thank you so very much! It worked great.

How did you know the syntax? Is it in some documentation? Also, do you have any suggest on a work flow for this? I copy code from the adaptive cards designer, paste as JSON in Copilot Studio, switch to Formula and then adjust (remove quotes from) the code where neded. It's kind of tedious.

Thanks again. I really appreciate your help!

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Artur Stepniak 1,539 Moderator on at

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Hello,

I've used interpolated string to achieve this, tried to find it in the language reference for Power Fx - it's a language used in PowerApps, which's also used in Copilot Studio - but without luck. Maybe you'll have better eye: https://learn.microsoft.com/en-us/power-platform/power-fx/overview. Nevertheless, it's the one with $"{}".

I've done it the same way, I don't see any other option. You could use GPT to fill it for you, something like: Convert this adaptive card JSON to Power Fx formula.

In case of any other questions, let me know. If the answer helped you, mark it, so that others can benefit from it.

Best regards,

Artur Stepniak

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Vinoth Selvam 1,592 Super User 2025 Season 1 on at

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Yes i have also tried and we dont have a proper documentation on these.

Thanks @Artur Stepniak.

It was very helpful.

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