Re-bind datagrid when window is closed

Question

I have a data grid that displays data from a sql server. I have an add button, that when clicked it opens a new window where the user can put the information for the new item that is being added. When the user clicks save, the data is being saved to the database, but its not showing up the in the grid. Is there a way that I can make the datagrid bind when the add window is closed? Let me know if more info is needed. Thanks.