I have search filter, whose value need to retained when the post back is done.
That should be the default behavior. What settings have you set for the Web Part?
What web part are you using? Smart search dialog with results?
When is it losing the value? If paging is setup to use a URL parameter, then it's not posting back, it's navigating to another page with a new URL parameter in it with the page number.
Yes I agree with Brenden. What exactly you are doing and web part are you using. COuld you please xplain more?
Please, sign in to be able to submit a new answer.