Asp.net prevents refresh and resubmit to trigger background events

Asp.net background event binding is a very useful function. However, if you refresh the page after the page is submitted, the page will be re-posted and the background method will be called. This is the implementation of almost all browsers: After you submit a form in post mode, if you directly open F5 refresh, the form will be submitted again!

There are two solutions:

1. In simple cases, use respone. Redirect (URL) to redirect to the current page through get after your background event processing is complete.

2. If you cannot use the above redirection method in some cases, you can use the HTTP header's accept to determine whether the page is refreshed. When the page is refreshed, the value of accept is */*.

1 If (request. headers ["accept"] = "*/*")
2 {
3 // the current page is refreshed
4}