I have a datagrid I've created with templated columns to allow batch data 
entry (like at
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vbtchTopQuestionsAboutASPNETDataGridServerControl
.asp 
)

Now I want the user to be able to request more blank rows in the grid while 
not losing the data he's entered - I can add more rows to a datatable and 
rebind, but that loses the data entered - how can I get the grid's current 
datasource and add rows to that?

Philo