按行数分页
1. Create a new Row Group with the following grouping expression: =Ceiling(RowNumber(Nothing)/<Number of rows per page>).
2. Create page break between each instance of the group
* To display total of the previous page on the first record of the page:
1. Create a new Total Record Inside the new group above your details section.
2. In Amount field where you want to display the total of the previous page add the following expression: =Previous(Sum(Fields!Amount.Value))
*To hide the total row on the first page which is empty:
1. Go to Row Visibility and use the following expression: =IIF(RowNumber(nothing)><Number of rows per page>,false,true)