Dynamic Parameters

Iam programatically passing parameters to the rdl file, Right now I have four parameters but if I want to have a choice of giveing only 2 or more that 6 parameters then do I need to have a different RDl files one with 2 parameters & another with 6 parameters.
I dont think it is feasible.
Even I should have the flexibility to add or remove the number of parameters dynamically. is ther any wayhow can I sole this situation.

Example: Iam displaying employee table of AdventureWorks database where Iam passing
Parameter 1.DepartmentId
Parameter 2.Title
and for Hiredate
iam passing i.e
Parameter 3. startdate &
Parameter 4.enddate

now that I have to give all the values in parameters to view the report if I want to all the employees in deptid = 5 having Title="Buyer" but not restricting them with date then it is not possible.

I hope the Above situation is clear please feel free if U have any queries.

HELP ME Dude's

Regards

You could assign default values to all 6 parameters at report design time. If a parameter value isn't specified at runtime the default value will be used instead. Just write your SQL query to take the default values into account and not use the param as a filter value - it generally looks like (@.Title = TableName.Title OR @. Title IS NULL) AND ...
The one caveat is that default values can sometimes throw off the optimizer and make for long running queries.