I was created one web application. In which i am using the ajax control asyncfileupload file uploader in update panel.
Upload file correctly but when i refresh the page then double this file is uploaded..
how to fix this problem in asp.net? please help me
how to postback the page..

With no code to go on I'm speculating but have you got the code to upload the file in the Page_Load method? if so, and you don't want the action repeated, you need to put the code inside of

if(!Page.IsPostBack) {
// your code

This means your code is only called the first time the page is loaded. Subsequent reloads (postbacks) skip the code.

Is that what you need?

write condition if(!page.IsPostback) then "write you code " end if

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