Program

[korata]

Can someone explain this program.I am fairly new to Crystal report and i would like to use formulas in my report.I came across with this formula and i want to know what it means.



if isNull({?DistrictId}) then
true
else
if ({?DistrictId} = 'any' or {?DistrictId} = '') then
true
else
{PERMIT.DISTRICT_MA_ID} = ToNumber ({?DistrictId})

 

[kskid]

{?DistrictID} is a parameter field that was created in the Field Explorer and will prompt the user to enter a District ID number. If the user wants all districts, then input the value of ANY or no entry (isnull({?districtid}).

The formula is placed in the record selection formula in Select Expert.

-Larry