How to express "is null" sql syntax in linq to sql -


how can express "is null" sql syntax in linq sql? 

where(r => (r.level1.equals(l[1] == "" ? null : l[1]))

in above code linq sql converts linq expression following sql not want.

@p1=null

i want linq converted following sql

@p1 null

how can achieve this?

try this

if (l[1] == "")     where(r => (r.level1 == null)); else     where(r => (r.level1 == l[1]));

if use ternary operator expression evaluator find it's expression returning string, cause of it'll use = operator.


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