How to determine a report parameter based upon selection of other report parameter

Hi there,

I have two parameters called Start Date and End Date which are to be populated based upon another parameter Perid (This parameter has default values as Weekely/BiWeekly/Monthly with default : Weekly) Based upon the selection made in Period dropdown, I need to populate Start Date and End Date accordingly.

The Start Date and End Date Values are calculated using a custom code.

I have already assigned StartDate =Code.MyFunction((Parameters!Period.Value).

But when I change the Period value to anything other than default value, the start date and end date are not updated. They still show the dates for default period value i.e., Weekly.

Please suggest.

Thanks.