We are evaluating PDFViewer features

Posted by: peter.shi on 9 June 2021, 6:19 am EST

  • Posted 9 June 2021, 6:19 am EST

    we are looking for a PDF viewer which supports the following requirements:

    -signature pad pops up as clicks on signature field

    -checks if all signature fields are signed

    -if no, prompt and jumps to the one of blank fields

    -if yes, enables “submit”

    • handles multiple signatures.

      Say, user signs on one field, then his signature can be reused on other fields optionally.
    • keeps track of who signed each of the boxed

    does your PDF viewer support these? can please provider us some samples (asp.net core MVC or Blazor or JS)?


  • Posted 9 June 2021, 11:56 pm EST

    Hi Peter,

    keeps track of who signed each of the boxed

    It means you would like to know the user name who added the signature


    Manish Gupta

  • Posted 10 June 2021, 7:28 am EST

    hi Manish,

    -as for multiple signatures.

    the customer may have to sign multiple places on a doc, say a contract needs the customer full signature & initial.

    in the sample provided above, signature can be moved around. Usually in our docs, the signature positions are fixed. ideally, the customer clicks one signature box, a signature pad shows up, sign on pad, then signature will be attached to that box. when clicks the next signature box, the customer can optionally pick the signature already created.

    once all signature boxes get filled, the submit is enabled. the signed pdf will be submitted back to server.

    • as for keeps track of who signed each of the boxed.

      the doc may need to be signed by multiple persons. A person shouldn’t sign on wrong boxes. can we control which signature boxes can be signed?


  • Posted 20 June 2021, 9:43 pm EST

    Hi Peter,

    We may open the Signature pad on Button click using the JSAction and add the Signature.


    For restricted signature, we may add the condition based on the user and allow to click on button for the authenticated user. Please refer to the following demo sample:


    Hope it helps!


    Manish Gupta

  • Posted 28 June 2021, 2:37 am EST

    in our cases, for example, a contract requiring buyer’s & co-buyer’s signatures is sent out to buyer & co-buyer separately.

    we need:

    -merge buyer’s & co-buyer’s signatures to one PDF, if they are signed on different devices

    -automatically jumps to next signature box.


  • Posted 29 June 2021, 1:39 am EST

    Hi Peter,

    • “Merge Buyer and co-buyer signature:”

    In this case, we need to provide the saved PDF at the location under contract id folder at server.

    Now, when any of the user signs the PDF, retrieves the signature and append to the original PDF. For this, we need to modify the onModified event for SupportApi.

    • “automatically jumps to next signature box.”

    Could you please elaborate on this? Is there multiple signature field to be filled by the same user?


    Manish Gupta

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