Question

I have a linq query like that:

Elementos = From b In Elementos Where b.Value.IdGrupo = 0 Select b

“Elementos” is a dictionary(of long, MyObject). MyObject has approximately 50 properties.

The problem I have is that I have a new requirement to accept string parameter with a “where” condition. Something like "property1>10 and property2 like 'anystring' or property3<=25". (That means any property could have a condition. I have string and numeric properties.)

I’d like to keep using linq, adding the condition as it comes. I’m aware that it could produce an exception if the condition is misspelled or something, but that’s acceptable (by try catchs). I wouldn’t want to parse the string to build parameters or anything. Do I have a chance?

Thank you very much!

Answer 1

You can use Dynamic Linq:

Dim filter As String = "property1>10 and property2 like 'anystring' or property3<=25"
Dim results = Elementos.Where(filter)