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Asked: 2026-05-10T16:42:17+00:00

I have created a user control to handle adding comments to certain business entities,

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I have created a user control to handle adding comments to certain business entities, like contacts and customers. Works great … except for one issue.

I am using a ListView control to edit and delete comments, and a separate area, on the same user control to add a new comment. All of this is wrapped in an UpdatePanel.

Screenshot

Here is my scenario … the user adds a new comment … the page does a postback, the data is successfully saved, and the ListView control is updated to show the new comment. Now, if the user refreshes the browser, it will naturally postback again and will add another duplicate record.

Any ideas on how best to prevent this?

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1 Answer

  1. You could try using the Post/Redirect/Get pattern. Basically instead of letting the postback send the data, redirect to the page. That way, if a user refreshes, s/he is refreshing the GET command rather than the POST.

    Sorry.. missed the UpdatePanel piece. Make sure that your submit button is also within that UpdatePanel. A page refresh would not affect your AJAX call, but when the button is outside the panel, it’s doing a regular postback so you would be sending the Add Request again.

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