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POTwo types of postback events
 

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    <p><br /></p> <p>1) I found two articles, each categorizing a bit differently the two types of postback events:</p> <blockquote> <p>One resource says the two types of postback events are <strong>Changed</strong> event ( where controls implement IPostbackDataHandler ), which fires when data is changed between postbacks, and then are <strong>Raised</strong> events ( where controls implement IPostbackEventHandler ), which are raised by server controls for whatever reason the control sees fit </p> <p>Other article says the two types are <strong>Immediate response</strong> events and <strong>Change</strong> events. According to this article, Immediate response events are ones that actually trigger a postback</p> </blockquote> <p><br /></p> <p>a) Which categorization is correct?</p> <p>b) If second article was correct, then if TextBox control had AutoPostBack=”true”, shouldn’t then TextChanged also be considered Immediate response event?</p> <p><br /></p> <p>2) When page is submitted back to the server due to some user action, <em>then at Event handling stage</em>, ASP.NET raises events of all controls that got their data changed since the last postback. The event that actually triggered a postback ( such as Click event ) is raised last</p> <p><br /></p> <p>a) But what if user selecting a row in GridView caused a postback? When GridView causes a postback due to Row selection, then unlike simpler controls ( like TextBox or Button ), that postback causes GridView to fire not one, but several server-side events during Event handling stage ( SelectedIndexChaning and SelectedIndexChanged). </p> <p>Which of these GridView’s events is considered by ASP.NET to be the one that caused a postback? </p> <p><br /></p> <p>thank you</p>
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