How can I set an ASP.Net web page to expire so that if the user clicks the submit button, he/she will get a page expired error if the browser’s back button is pushed to try to go back and press submit again?
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How can I set an ASP.Net web page to expire so that if the user clicks the submit button, he/she will get a page expired error if the browser’s back button is pushed to try to go back and press submit again?
First off, use the Post-Redirect-Get pattern when the user submits the form. This will prevent them from being able to use the back button easily. To do this, all you really need to do is issue a
Response.Redirect()call after you finish processing the form, even if it’s to the same URL.Secondly, you could consider using a unique id field in the form that is tied to the submission process, so that if the submission is completed, the same id cannot be used again. The suitability of this would depend on what you’re doing though.