Question

Using VS 2008 Crystal Reports, I would like to do a running total on a formula that is calculated on a group change. When I click on add a running total, this formula does not appear in the Available Tables and Fields list.

This is the logic:

On Change Group of group

if CalculatedValue > 0 then
    ReportRunningTotal1 += CalculatedValue  
else
    ReportRunningTotal2 += CalculatedValue  

Can I specify a condition in a running total? If not, how else could I do this?

More info: I am doing a running total called GroupRunningTotal of the value of db field BillableHours. At change of group, I am comparing GroupRunningTotal to a db field for that group MaxHours, and I display a result of MaxHours - GroupRunningTotal at the group level.

Appropriate today – Think of it like the electoral college – the person who wins the election does not depend on total number of votes, but of number of votes in the electoral college.

Answer 1

You most likely cannot use one RT field as condition for other RT field. You can use formulas, placed on group footer and evaluated ‘whileprintingrecords()’; in these formulas you can assign/sum into some variables and display these variables at the end of report. About like next (generic idea only, you need initialization and display routines as well):

numbervar rtcurrent := sum({somefield}, {groupfield});
numbervar rtplus;
numbervar rtminus;
if (rtcurrent > 0)
then rtplus := rtplus + rtcurrent
else rtminus := rtminus + rtcurrent;