How to handle form submission ASP.NET MVC Back button?

Question

i have a form which allows the user to key in the data and then submit. if everything works well on this action result, then i will redirect the user back to a thank you pag

Answer 1

What do you mean by "potential weird bugs"? I doubt the user would click submit again unless they wanted to post exactly the same thing again. I you don't want duplicate posts, check the content against your DB before posting.

If you really don't want people posting the same form twice, put a randomly generated number (just make sure it's random enough to avoid collisions, or use something like a combination of the user ID and a precise timestamp) into a hidden field, save that with your data and check that it doesn't already exist in your DB before saving anything.