title: Postback an UpdatePanel on application variable change
body: <p>I have a multiuser application, I need to refresh an Update panel when one of users change the state of an application variable to true. </p>
  
  <p>What is the best way to do this? </p>
  
  <p>I've tried with a timer, but on timer tick all page was postback.</p>
  
  <p>Thanks</p>
  
  <p>-------EDIT--------</p>
  
  <p>Thanks for suggestions, I would try to explain better my problem.</p>
  
  <p>I have a big database, shown in a bound gridview. Most users only read data, but someone can edit. Is very important that the changes appears immediately to all users that are seeing the GridView. The best solution that I found is to define an application variable and users that are editing set this variable to true. All other users update GridView only if the application variable is true, else they do nothing.</p>
  
  <p>Is that a good solution? </p>
  
  <p>What is the better way to update the GridView when the application variable change its state?</p>