Power Apps - Building Power Apps

Varpen

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Posted on 6 Apr 2025 14:55:45 by CU02040724-0

hi, i am trying to set up pen sign on powerapp.

Step 1 ;

Peninput1

One select

Set(varPenData,Self.Image)

Step 2 :

If(

varPenData = PenInput1.Image,

"Sign is completed.",

"Sign in bank colume."

)

Step 3 : text label

PenInput1.Image = code is display
 
Step 4 copy text label step 3
 
varPenData. = code is undisplay.
 
how to slve this step?

Categories:

Using Apps Using Formulas

Screenshot 2568-0...

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ronaldwalcott 3,530 on 24 Apr 2025 at 00:05:13

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Varpen

PenInput1.Image contains a reference which can be used to extract the image and display it in an image control using

Set(varImage, JSON(PenInput1.Image,JSONFormat.IncludeBinaryData));

Set(varCleanBase64Image, Substitute(varImage, """", ""))

The Image property of the control is set to

varCleanBase64Image

The varCleanBase64Image is created because the JSON adds quotations to the start and end of the string

The JSON string can be compared to detect differences
ronaldwalcott 3,530 on 23 Apr 2025 at 22:59:42

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Varpen

How does this work?

Does PenInput1.Image actually store some value when you draw something or is this just a pointer which points to storage?

If you assign a variable doesn't it just copy the reference value not the contents?

Isn't this why people are unable to check changes using the PenInput control?
BCBuizer 22,027 Super User 2025 Season 1 on 23 Apr 2025 at 19:48:49

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Varpen

Hi @CU02040724-0,

I hope my previous reply has helped you resolve the issue you were facing. If it hasn't please update on your findings. In case it resolved your issue, please mark it as the Verified Answer ✅.
Suggested answer

BCBuizer 22,027 Super User 2025 Season 1 on 07 Apr 2025 at 20:51:58

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Varpen

Hi!

Try actually drawing something in the PenInput control to populate the variable. When I was trying to reproduce the issue, I couldn't, hence I suspect you may have overlooked this step:

If this reply helped you in any way, please give it a Like 💜 and in case it resolved your issue, please mark it as the Verified Answer ✅.