How to avoid the button events on Refresh of page

asp.net, events, refresh

Solution

When the user clicks F5 (or uses a toolbar button to refresh the page) it will cause a new request, identical to the previous one, to be sent to the server. The `Button.Click` event will be raised again, but you have a few ways to protect yourself against inserting the data twice.

The best way, IMHO, is to use the Post/Redirect/Get pattern. In your code, right after the point where the data is saved, do a 302 redirect to a confirmation page:

protected void btnSaveStuff_Click(object sender, EventArgs e)
{
    SaveStuffToDatabase();
    Response.Redirect("confirmation.aspx");
}

When using the pattern, the `POST` to the original page will not end up in the browser history, and refreshing the result page will cause the final `GET` to be repeated, which should be safe.

Problem

I have .aspx page that page inserts the data to the database on a button click. But when i press the button it is going right. i m getting the Successfully message as " successfully inserted data". In this situation if i press "F5" or Refresh the page it is firing the button click event. Why it should be ? How to avoid this condition ?

Original source