Can I change the (null)'s values in a datagrid?

Hi, I use a datagrid for see a database, but when i have got any value "null" in any field, i'd like that it wasn't seen in the datagrid.

can i solve this problem?

thanks.

name	mother_name	father_name
Alberto	(null)	(null)
Rafa	(null)	(null)

this is a example, i don't want to see it, i want to see " Alberto |     |    |"
empty fields.

I use Visual Studio .net 2002.