How to process repeated Page Submission for F5 page refresh

After submitting a page, if we click F5 again to refresh the page, a prompt will pop up prompting us that if we continue, we will resend the content we just submitted, if it is similar to payment or one-time operation, we should not do this operation, otherwise it will cause repeated submission problems. To solve this problem, we can use the following methods:

1. After the submission is successful, save a successful state to the session and load the page again.

2. in the page_load method, the status value of the session field is determined. If it is successful, the success information is displayed. Otherwise, an error message is displayed, followed by the session. remove () to clear the cache.