SSRS报告-总和标题-不在组中

Question

How do I sum (in header row) the values in the grouped row below?

Instead of the word 'Performance' I want to say sum the field below. The highlighted field is called: Textbox119

When I say in the row above

=sum(ReportItems!Textbox119.Value)

I get the following error message:

The Value expression for the text-run Textbox... uses an aggregate function on a report item. Aggregate functions can be used only on report items contained in page headers and footers. 

If this is the wrong way to add the rows below ... How do I do it?

Answer 1

Right mouse the group field you wish to total, select add total, select before. Adjacent to the new Total label enter the aggregate function and field name you desire, for example: =Count(Fields!Venue.Value)