I am using Full Text Search with LINQ in my application and as this is not supported by LINQ I use a table-valued function workaround. The function is created on SQL Server 2008.
Surprisingly, I get error “The full-text query parameter for Fulltext Query String is not valid” when I search for a simply text e.g. “manager”
I used SQL Server Profiler and found out that LINQ generated the parameter as nvarchar(4000) instead of nvarchar(250) which is in my function.
The biggest surprise came when I changed my SQL Server function so it accepts parameter as nvarchar(4000) instead of nvarchar(250) and the problem is solved.
I was also playing to change the parameter to nvarchar(2000) and less but this also didn’t work.
Does anybody know why this behaves this way?
Updated on 18th November 2013 – Good news and bad news
Good news – I am now using Entity Framework 6 for this particular example and it is not anymore needed to use nvarchar(4000)
Bad news – You have to use instead nvarchar(max) 🙁
For an expanation see the following link http://social.msdn.microsoft.com/Forums/en-US/linqtosql/thread/1a46d676-32f0-44a4-b39f-61a17bccb8e3/.