Can't send PenInput to Power Automate

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Posted on by eseb

Hello experts,

following this guide

https://matthewdevaney.com/capture-a-signature-with-power-apps-pen-input-and-save-to-sharepoint/

I am unable to send the PenInput to my Power Automate Flow. Getting this error message in the Edge DevTools

{
 "error": {
 "code": "TriggerInputSchemaMismatch",
 "message": "The input body for trigger 'manual' of type 'Request' did not match its schema definition. Error details: 'Required properties are missing from object: file.'."
 }
}

This is the code I tried:

TabletTestAutomation.Run(
 LabelLegalText.Text,
 {
 contentBytes: ImageSignature.Image,
 name: "signature_" & Text(Now() & "yyyyMMddhhmmss" & ".jpg")
 }
)

( ImageSignature Image uses this FX: PenInputSignatureCustomer.Image )

The PA Monitor does show this body:

"body": {
 "text": "Beliebiger Rechtstext, den der Kunde unterschreiben muss. Beliebiger Rechtstext, den der Kunde unterschreiben muss. Beliebiger Rechtstext, den der Kunde unterschreiben muss."
 }

The response message is the same like in the DevTools.

Can anyone explain why this is not working? I also tried to convert the PenInput directly. The PA compiler did not accept that code:

// Save PenInput as JSON variable
Set( PenVar, JSON ( PenInputSignatureCustomer.Image, JSONFormat.IncludeBinaryData ) );

// Extract to Base64 sequence
Set( PenInput64Bit, Mid(PenVar, 24, Len(PenVar) - 24 ) );

TabletTestAutomation.Run(
 {
 contentBytes: PenInput64Bit,
 name: Concatenate("signature_", Text(Now(), "yyMMddhhmmss"), ".jpg")
 },
 LabelLegalText.Text
)

EDIT: That is how the Power Automate Flow Input looks like

Categories:

Building Power Apps

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jinivthakkar 4,187 on at

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@esbe please can you try changing the trigger in the flow :

and then in the create file action : ask in power apps file name and content

and pass both from power app to flow :

TabletTestAutomation.Run(Concatenate("signature_", Text(Now(), "yyMMddhhmmss"), ".jpg"),PenInput64Bit)

Hope this helps.

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eseb 7 on at

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Thanks for your reply. I tried your solution and changed the trigger as suggested:

But the compiled don't accepts the code:

Here the full code:

// Save PenInput as string variable Set( PenVar, JSON ( PenInputSignatureCustomer.Image, JSONFormat.IncludeBinaryData ) ); // Extract to Base64 sequence Set( PenInput64Bit, Mid(PenVar, 24, Len(PenVar) - 24 ) ); TabletTestAutomation.Run(Concatenate("signature_", Text(Now(), "yyMMddhhmmss"), ".jpg"),PenInput64Bit) // Compiler ERROR here

What I am missing?

EDIT: I changed the trigger back to PowerApp (V2) and figured out that it did work with only one argument.
TabletTestAutomation.Run(ImageSignature.Image);
But it didn't work with 2 arguments. I also could not find any documentation for the Run() function. This would help me a lot. Anyway, with only the Image passed the Power Automate Flow does trigger now.

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jinivthakkar 4,187 on at

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@esbe so is the issue resolved ? if yes please accept as solution else we can continue addressing the issue.

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eseb 7 on at

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No sorry. It is not resolved, because I also need the second variable.

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jinivthakkar 4,187 on at

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@esbe this is what I have done and it works

Set( varSignRawImg, JSON( ImgPreviewSign.Image, JSONFormat.IncludeBinaryData ) ); Set( varSign64Bit, Mid( varSignRawImg, 24, Len(varSignRawImg) - 24 ) ); Set(varTimestamp, Text(Now(), "yyyy-mm-dd hh:mm:ss")); MyFlow.Run(Concatenate(User().Email,"_" ,varTimestamp, ".jpg"),varSign64Bit)

in flow - Ask in power apps for file name and content

when you do ask in power apps for both then it will take two inputs for flow

This is working at my end, please try this.

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eseb 7 on at

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Sorry for my late reply. Something broke and I could not load this page.
After many tries I've found the problem and why it was not working. This is the working code
without any compiler errors. As you can see I had to use a semicolon inside the Run( .. ) function. Code snippet as text:

// Save PenInput as string variable Set(PenVar,JSON(ImageSignature.Image,JSONFormat.IncludeBinaryData)); // Extract to Base64 sequence Set(PenInput64Bit,Mid(PenVar,24,Len(PenVar)-24)); // File name Set(FileName,Concatenate("signature_",Text(Now(),"yyyy-mm-dd_hh_mm_ss"),".jpg")); // Submit Form SubmitForm(EditForm1); // Run Power Automate TabletTestAutomation.Run(FileName;PenInput64Bit);

But when I pass a JSON object it is required to use a comma:
Otherwise the compiler would not accept it with a semicolon
That is really strange, but maybe the reason could be that I am working with a german system. As we know excel does also work with semicolon and not comma. Maybe this is the case for PowerFX?

EDIT: The created file does look strange and cannot be opened ?

How can I change that blob to a jpg?

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