Dynamic LINQ - Is There A .NET 4 Version?

Question

I'm looking to use LINQ for some searching routines and wanted to have some dynamic where clauses. So, for example, if a user wants to search by city or search by state, I would have a dynamic LINQ Where<> call instead of creating two strongly typed LINQ expressions and then using the appropriate one based on how the user wants to search.

So I would like to do this:

String criteria="p.City='Pittsburgh'";  //or "p.State='PA'" personData.Where(criteria) 

instead of

personData.Where(p => p.City=="Pittsburgh");

or

personData.Where(p => p.State=="PA");

I came across a blog post by Scott Guthrie talking about Dynamic LINQ in the Visual Studio 2008 samples. This seems to do what I want, but my questions are:

1. Is this sample library supported by Microsoft?
2. Scott Guthrie's article is in regards to VS2008 (.NET 3.5). Is there a better option for .NET 4? Maybe something that was released with .NET 4 that accomplishes the same thing (or something very close)?

Thanks in advance!

Answer 1

You may want to take a look at PredicateBuilder