When i run the page i'm getting a message showing."Missin g Parameter values" and want display the report. i've used following formula
Code:
Year ({tbl_DisasterRegistration.Date})  =  Year (CurrentDate)  - {?@YearCount}
By right click on the report...Report->Selection Formula->Record

my code is used in DropDownList1_S electedIndexCha nged

Code:
ReportDocument crystalReport = new ReportDocument();
...