Question

So I have Products class that represent the products table.
To get all the records I do:

db.Products.ToList()

And I have a string like this:

String queryString = "mp=5 AND optic=TRUE AND price=500";

My question is how can I use this string to filter Products? Where func only accept lambda expressions..

Thanks

Answer 1

I’m not sure if it’s still supported or not, but you can use Dynamic LINQ to allow you to add ‘text’ based expressions as you require. See:

• http://weblogs.asp.net/scottgu/archive/2008/01/07/dynamic-linq-part-1-using-the-linq-dynamic-query-library.aspx
• http://pranayamr.blogspot.com/2011/04/dynamic-query-with-linq.html

You may also want to think about using a Predicate builder to do the same job more declaratively. There are a few out there, but one that I’ve used with great success is the albahari one:

• http://www.albahari.com/nutshell/predicatebuilder.aspx

hope this helps..