title: Set the content of a new row Datagrid
body: <p>I have a DataGrid showing some databases having quite some columns.<br>
  I would like that, when the user edit a new row, some values are set automatically.<br>
  With the windows form DataGrid that would be easy, since there's RowsAdded event handler.
  But how could i handle this with the wpf DataGrid ??<br>
  Edit : my DataGrid is bound in Xaml to a public property which is an ITable. When user select a table in a ComboBox, the property is updated with corresponding table.
  Yes there's autogenerating column, and the way the user can enter a new row is to edit the last blank row (default behaviour).</p>