Question

I have a sql stored procedure that uses isnull in the order by clause to order items by the latest reply date, or if that is null, by the posting date:

Example:
ORDER BY isnull(rtb.LatestReplyDate,CB_TOPIC_DATE_POSTED) DESC

I am trying to get that to work in the orderby clause of a linqdatasource, to no avail yet:
Example:

I know isnull isn’t valid there, but I have yet to figure out what would work, if anything. I tried the ?? operator as well. Any ideas?

Answer 1

Check this linq..err…link

–Addendum

OrderBy(p => p.<YourCompareVariant> == null ? p.<IfNull> :  p.<IfNotNull>); 

In your case:

OrderBy(p => p.LatestReplyDate == null ? p.LatestReplyDate : p.TopicDatePosted);