autorefresh asp datagrid

Question

Does anyone know of a way to automatically refresh the contents of a datagrid on a Web Form? Currently I am using a button's click event to rebind the data, but I don't really want to display the button and it seems as if the System.Timers.Timer class only works in Windows Forms. Does anyone have a way to refresh only the 1 datagrid after a certain amount of time. I can't use a meta refresh either...it looses the state of the page. Thanks