problem in nesting datagrid in to a nested datagrid

[sajvargs]

hi

i have a datagrid control in its first column i have added a button in
the second column i have added a datagrid using template
in this datagrid also i have done the same thing

my problem is i canot access any of the property of the inner(that is
the third )datagrid
any one can help me to build this control my self

the actual control which i want is look like the one in the link below

http://www.dbnetgrid.com/dbnetgrid/demos.aspx?demoid=15

regds