What does "PostBack" mean in ASP.NET?
A PostBack is the process of presenting an ASP.NET page to the server for processing. PostBack is done if certain credentials of the page are to be checked against certain sources, (for example, confirmation of username and secret key/password using a database). This is something that a client machine can not able to achieve and subsequently, these details must be ‘posted back’ on the server. So we can say that a postback event occurs on the client-side but is handled by the code in a copy of the page running on the server.
