i'm new using nintex form and workflow.Is there a way to locked the edit form and give warning for a list item if another user already open the form?
Out-Of-The-Box this is not possible. SharePoint does not offer such a locking-mechanism, and Nintex Forms has no additional feature in this regard.
You could create a SharePoint-List to hold locking-informations. Whenever someone opens a form you query this list if the current item is already "locked" by someone else. If yes, you display a message to the user and redirect the user to the display-form of the current item.
However: you will also have to add some script to be executed when the current item is either saved or canceled. In this case you would have to remove the entry for the current item from the list.
As a bonus you might want to check the age of the entry when loading a form. If the entry is older than a certain threshold you could consider this entry to be stale and delete the record and create a new record.
I've created such a mechanism prio for a customer (although not within Nintex Forms, but that doesn't matter in this context). I have to point out: this is not a fool-proof approach! Someone could still modify entries using the SharePoint API (SSOM, CSOM, JSOM, SOAP, REST) without any locks!
thank you for your reply.
have you ever tried that one? if yes, can you give the procedure how to do that? or the link?
i already try this one https://www.c-sharpcorner.com/UploadFile/0e18a8/check-in-and-check-out-functionality-for-custom-list... but doesn't work.
as I mentioned already: I did that for a customer-project quite a while ago. Basically I did the following:
Thats basically what you need to do.