limiting the no. of characters entered in textbox html helper element in asp.net mvc 2.0

Answer 1

The best way to do this in MVC 2 is to take advantage of the inbuilt validation by using data annotations.

For the Quantity field you should use the Range annotation.

Here is a great post to walk you through it, and if you follow it to the end he covers using jquery to do the client side validation too.