How does asp.net MVC remember my incorrect values on postback?

Question

This is working, but how???

I have a controller action for a post:

[AcceptVerbs(HttpVerbs.Post )]
public ActionResult Edit(Person person)
{
   bool i         


        

Answer 1

The previously entered value is stored in the ModelState. When you have an error on the form, the helper pulls the value from the ModelState instead of using either values from the Model or the ones specifically supplied (under the hood, if you don't supply an explicit value it will default to the model value if there is one when there are no errors).