Question

Is it possible to include a clause in the where (LINQ) but only if its “NOT” empty ?

i.e.

  where c.Code == sCode && p.Code == code

In this case the variable (standard c#) is called code … if its NOT empty then the above where is great.. but if its empty then i don’t want to include in it the where

i.e.

  where c.Code == sCode

In SQL its done like this

       AND ( ( @code = '' )
                  OR ( @code <> ''
                       AND C.Code = @code
                     )

Answer 1

where c.Code == sCode && (string.IsNullOrEmpty(code) || p.Code == code)

That’s for standard LINQ, I have no idea if it works for LINQ to SQL.

Edit:
This works through short circuit evaluation

if c.Code == sCode is false, it stops evaluating and returns false
otherwise, if string.IsNullOrEmpty(code) is true, it stops evaluating and returns true
otherwise, return p.Code == code