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my page is using sqlcachedependency. so the page read information from cache until data in database is changed but i need the page was auto refresh when data is changed.
How can i do that?
The problem you have is that the Server knows the data has changed but that there is no active communication with the client until the user hits a button in his browser.
A solution for this could be to write some javascript that would ask the server every X seconds if there are changes. If you want to implement something like this you need to look at AJAX and the Periodic Refresh pattern.
Or you could have a look at the new WebSockets that’s being implemented in HTML5 which allows bidirectional communication between client and server.