Partial Validation and Full Validation on 1 page

 Hi,
 I don't seem to figure out to combine these two things.
 I have 2 buttons. The first button is loading according the input of 2 fields a datagrid on the same page. So I assigned a ValidationGroup to those 2 input fields and to this button. (Using this button is not obligated) The second button is the real submit button.  This button is validating only the controls that aren't assigned to the ValidationGroup.
I would like that the last button validates all the controls, not partially the rest. How can I accomplish that?
 Stijn

...