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Lutzy
Helper II
Helper II

Help adding signature from PenInput to Sharepoint list as attachment.

Hi Everyone,

 

I have followed these instructions precisely and I cant seem to get this to work.

https://www.youtube.com/watch?v=AIJ6lD8H1WM

 

I receive an error on my flow - 

InvalidTemplate. Unable to process template language expressions in action 'Add_attachment' inputs at line '0' and column '0': 'The template language function 'base64ToBinary' was invoked with a parameter that is not valid. The value cannot be decoded from base64 representation.'.

 

SubmitForm(EditForm1);

Sign_to_Sharepoint.Run(ID,DCOrderNo.Text,
Mid(JSON(PenInput3_1.Image,JSONFormat.IncludeBinaryData),Find
(",",JSON(PenInput3_1.Image,JSONFormat.IncludeBinaryData))+1,Len(JSON(PenInput3_1.Image,JSONFormat.IncludeBinaryData))-Find(",",JSON(PenInput3_1.Image,JSONFormat.IncludeBinaryData))-1))

 

Can anyone assist me with where I may be going wrong?

 

Or

 

Suggest a better way to have someone sign a Pen input and then attach to a SharePoint list. 

14 REPLIES 14
WarrenBelz
Most Valuable Professional
Most Valuable Professional

@Lutzy ,

You can cut that down a bit to this, but your issue will be in the Flow which you have not posted

With(
   {
      wJSON: 
      JSON(
         PenInput3_1.Image,
         JSONFormat.IncludeBinaryData
      )
   },
   Sign_to_Sharepoint.Run(
      ID,
      DCOrderNo.Text,
      Mid(
         wJSON,
         Find(
            ",",
            wJSON
         ) + 1,
         Len(wJSON) - 
         Find(
            ",",
            wJSON
         ) - 1
      )
   )
)
Lutzy
Helper II
Helper II

Thanks @WarrenBelz ,

 

I tried your suggestion and got the same error.

SubmitForm(EditForm1_1); With( { wJSON: JSON( PenInput3_1.Image, JSONFormat.IncludeBinaryData ) }, Sign_to_Sharepoint.Run(DCID, DCOrderNo.Text, Mid( wJSON, Find( ",", wJSON ) + 1, Len(wJSON) - Find( ",", wJSON ) - 1 ) ) )

 

Error

Unable to process template language expressions in action 'Add_attachment' inputs at line '0' and column '0': 'The template language function 'base64ToBinary' expects one parameter: the string to decode from base64 representation. The function was invoked with '0' parameters. Please see https://aka.ms/logicexpressions#base64ToBinary for usage details.'.

WarrenBelz
Most Valuable Professional
Most Valuable Professional

@Lutzy ,
As I noted, your issue with be a mis-match between what you have sent to the Flow and what it expects. You have not posted the Flow - it should be something like this

WarrenBelz_0-1689122940630.png

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

MVP (Business Applications)   Visit my blog Practical Power Apps

 

Lutzy
Helper II
Helper II

I appreciate your help warren.  Here is the flow attached.  I am sure I have followed the video instructions exactly and the flow is pretty simple.  

Lutzy_1-1689123119976.png

 

 

WarrenBelz
Most Valuable Professional
Most Valuable Professional

@Lutzy ,

I actually updated my post just after I did it (please refer to the flow. I have just run it from this test app

WarrenBelz_0-1689124284348.png

with this code (I used 1 for the ID just to test)

WarrenBelz_1-1689124307271.png

and have a file with the pen image attached

WarrenBelz_2-1689124357865.png

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

MVP (Business Applications)   Visit my blog Practical Power Apps

 

 

Lutzy
Helper II
Helper II

Awesome, I think I am almost there.  If I specify an ID number as you have that already exists it works. So thanks for that.

 

However I am working with a new form and I have placed the Submitform at the beginning.   

 

I assume it creates the ID upon submit before the flow starts so it should work.  

 

How do I still map the ID to the ID that is created when the form is submitted?

 

Apologies if that is a basic question but I am still getting my head around how it works.

WarrenBelz
Most Valuable Professional
Most Valuable Professional

Hi @Lutzy ,

The only way you will do this with a new record is put the code OnSuccess of the Form and send

Self.LastSubmit.ID

as the parameter.

 

Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.

MVP (Business Applications)   Visit my blog Practical Power Apps

Lutzy
Helper II
Helper II

Hi @WarrenBelz ,  Sorry to bother you again.  I am still having issues with this.  If I specify an ID number it will work.  I cant seem to get this to work any other way and I have tried a number of different options.  

Lutzy_0-1689190838714.png

 

The fact that it works when I specify a number says that I am passing the right information.  It is just struggling with the ID.

 

 

The error I am getting is -

Lutzy_1-1689190979775.png

 

this issue only occurs on a new form.  When I edit an existing record the flow runs successfully and the image is saved to the Sharepoint list. (Image is blank but this might be a different issue.  At least the flow works on an existing record. )

  

WarrenBelz
Most Valuable Professional
Most Valuable Professional

@Lutzy ,

Self.LastSubmit.ID works on a new record - I use it in many places when I want to create "child" record references at the same time a new "parent" is created. If you create a new record and put this on a label

YourFormName.LastSubmit.ID

do you see the expected ID number ?

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