Dynamic Grand-total with lists and multi-value parameters

Basically I've created a list that subtotals according to the group.

I then created a multi-value parameter that allows the user to choose which group is shown in the report.

How can I get the grand total to refl开发者_运维知识库ect the parameter since its currently outside of the list?

To have your grand total reflect the parameter, you could place it in a one-row table (with no header/footer). Group by the same expression as your list, then filter the table by your parameter:

=Fields!YourField.Value = Parameter.YourParam.Value(0)

Finally have your grand total field, in the table, use the expression =CountRows() to get the correct number.

Hope this helps! --Dubs