Answer Posted / chinmayee mishra

Hidden fields technique is widely used in ASP.NET
programing. Hidden fields are html input control with
hidden type that store hidden data in the html. An example
for a hidden field can look like this:

view sourceprint?1.<input type="hidden"
name="__EVENTTARGET" id="__EVENTTARGET" value="" />In the
example above, I chose to show the event target hidden
field in order to indicate that even in postback mechanism
hidden fields are being used. The data stored in a hidden
field is available when the form is processed on the server
or when we use javascript.

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