Edit value in DataGrid

I am using a datagrid to show a datatable

I want to set the datagrid that alow use to edit value in it but not allow to add new rows

I have try the 'ReadOnly' as true

but it will allow user to add new reom

how can I send the datagrid like that?

THANK YOU~

[302 byte] By [OscarKwok] at [2007-12-24]