lambda - linq query with dynamic predicates in where clause joined by OR -

you can create dynamic queries in c# if add more restrictions current query.

var list = new list<item>(); var q = list.asqueryable(); q = q.where(x => x.size == 3); q = q.where(x => x.color == "blue"); 

in case, every new predicate added performing , operation previous. previous result equivalent to:

q = list.where(x => x.size == 3 && x.color == "blue"); 

is possible achieve same result or instead of and?

q = list.where(x => x.size == 3 || x.color == "blue"); 

the idea have variable number of expressions joined or operator.

expected result need written in how similar following pseudo code:

var conditions = new list<func<item, bool>>(); 

and later iterate conditions build like:

foreach(var condition in conditions)     finalexpression += finalexpression || condition; 

thanks raphaël althaus gave following link:

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

predicate builder solution. can use installing linqkit nuget. in url can find implementation of class.

note: in order make work linqtosql or linqtoentities iqueriable object must transformed using "asexpandable()" method, memory objects it's not required