Update Datagridview without webService in SilverLight

Hello ;

I wanted to update the gridview from mysql database in a Silverlight application and i dont have to use Webservice Inspite that i have to use socket server.

So how should i get to know that something updation has been done in database and based on that i have to Update the datagrid view without page refreshing. 

Please provide me details how to move forward step by step..