Dynamically building LINQ query using OR operator in VB

Question

I need to build a dynamic linq query with or operators. I have seen PredicateBuilder but that is in C# and my project is in VB. Basically I need to build a WHERE clause similar to this:

Where((this = 1 AND that = 2) OR (this = 1 AND that = 4) OR (this = 2 AND that = 4))

but the problem is the number will have to be determined dynamically at runtime, and added using a loop, like

for each item in myItems
    query = query.OR (this = item.a AND this = item.b)
next

How could I go about doing that?

Answer 1

Have you looked into the LINQ Dynamic Query Library?

Answer 2

Got the LinqKit.dll working, now using PredicateBuilder even with my VB project and it works very well!

For anyone else needing this see http://rocksthoughts.com/blog/archive/2008/04/10/linq-to-sql-dynamic-queries-3-ands--ors-together.aspx, very good article on how to do this.