Building convention registration platform - adding text field each

I am building a registration page, with different prices for member/non-member. A single user (company admin) will likely register several people for the convention. I think there are a couple way to make this work, but not sure how to pull it together....

I want to either update QTY in the form, and allow that "QTY" of field for attendee names...
Or
Provide an add to cart button up-datable firstName and lastName fields, and the user can click an "add more" to create as many "registrants" as needed. Then a single add to cart button that adds that quantity to the cart.

I thought I saw a tut on adding fields in this manner, but can't seem to find it, and not sure if it would fit into the ecart/multiple item single add to cart behaviors.

Thanks for the help in advance!

each user would need to be a separate registration you will not be able to add multiple registrations at once, you need to add each one indivdually.

you can add the user first name and last name columns to the eCart object, set these columns as unique. Then in the add to cart button behavior, set those columns to be updateable from a text list.

Setting the first/last columns as unique will not actually require a unique entry at the database though correct?

No, it will treat each first name, last name combination as a unique item in the cart.

All previous advice is great, now just trying to give the page the "feel" of multi item add to cart. I want to create 5-10 static cart buttons on this page, and leave the redirect blank so that the user can add more items without going back and forth to the cart.

Is there a way to show a success or thank you message when the add to cart button is pressed? Then I can just add a "go to cart" button on the page.

ie "Your item has been added to the cart, you may add additional registrations, or click Checkout above"

You could add the quick cart display manager to the page to show a running total of the items that are added and show a checkout button as well.

Thank you for all the help so far... Ran into another question.

If I am adding several 'editable' fields in a dynamic cart button, can I store the main (productId, qty, price, orderId) in the order details table, and then store my registration fields (first, last, company, etc.) in a separate table? Or am I just making this more complicated than it needs to be....

lastly, would I add <?php echo ((isset($_POST["fieldname"]))?$_POST["fieldname"]:""); ?> in the bindings section for each editable field where I am accepting text or checkbox

That is making it more complicated than it needs to be, but it could be done by adding a second store order details behavior to store the registration info in the second table.

No, that is not necessary, just set the field to be =editable from a txt field and the binding will be taken care of for you.