Check if task has already been submitted on opening InfoPath task form and switching view to reflect so

Question

I am trying to make my custom task form (of Visual Studio Sequential Workflow) to switch view to "Submitted" in case someone has already submitted this task before, since this task could be assigned to multiple people.

Target scenario: in case task has already been submitted by one user and another user is opening the form for this same task (by button from Outlook Task E-mail notification) user would see a message informing that task has already been submitted, by who and with which result.

I have designed a "Submitted" view for that purpose and now researching how to do the logic: either using Data tab > Rules > Form Load and set up actions there or using Developer > Loading Event and write it in code under FormEvents_Loading event in Visual Studio Tools for Applications.

I would prefer the VSTA option. Are there code examples of this (or something similar) being done available? I appreciate any hints you might have. Thanks.

Answer 1

You can make use of hidden fields inside infopath form. Add a hidden boolean field named "Submitted" in your form. Whenever user submit the form change the value of field to true. Next time when any user opens the form check what's value of hiiden field. If the value is true change the view to "Submitted View".

Answer 2

I am not sure how much sense is in checking something at opening (another guy could have opened a form a month ago) but in order to prevent overwriting you can try:

• InfoPath 2007 - Validating whether a form has been edited by another user since it has been opened

it is in VSTA

Update:
I cannot check it now, but I always thought that only the first opened instance of Infopath form is editable while all the following are being opened in read-only mode. Aslo, "When an InfoPath form is opened by a user, it is locked and only editable by that person."

Or, it is not correct?