In ASP.NET After clicking on Browser Refresh(F5) button postback happens .

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My application working well. but when i click browser Refersh(F5) button postback happens. How do i avoid this postback in asp.net.

Thanks,
Mangesh B.

Posted 4-Aug-12 19:57pm

Member 8090436

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Christian Graus · Accepted Answer · 2012-08-04T20:02:00

Solution 1

This is how the web works. If your last action was a POST, F5 repeats it. The way around it is for every postback to set up the state needed for your page to render itself ( so nothing lives in viewstate ) and doing a response.Redirect back to your page. This turns the POST into a GET, and F5 will do a GET, and render the page, which will render in the state you requested, because of values on the URL and in the session

Posted 4-Aug-12 20:02pm

Christian Graus

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Member 8090436 5-Aug-12 2:10am

Thanks for quick reply. But what i do for avoid this ?

Christian Graus 5-Aug-12 2:12am

You do exactly what I told you to. Someone else has posted some articles, if you could not understand my answer, you probably need something more in depth and at your level, so I suggest reading those.

Sandeep Mewara · Accepted Answer · 2012-08-04T20:05:00

This is due to how browsers work. Preseeing Refresh just repeats the last request. Example: The first time you POST the page, the browser sends all the data, then returns back HTML to render. If you hit refresh (F5) then the browser re-sends the last POST request thus re-sending the information again. You cannot avoid the postback but can find and handle it if you want to.

See few tips here:
Refresh Page Issue in ASP.Net[^]
Stop Refresh after Submitting your Request[^]
Detecting Page Refresh[^]