Question

How can I translate

select * from employees where (emp_id=@emp or @emp is null) and (dep_id=@dep or @dep is null)

to a LINQ statment?

Answer 1

C#

int empID = [whatever...]

var e = from e in db.Employees
        where e.emp_id == empID || e.emp_id == null
        select e;

I’m assuming the @emp is null part is a typo, and you wanted emp_id is null. If not, just switch it around.

I’d suggest reading some more on LINQ.