LinQ WHERE string.Contains or string.IndexOf?

Question

I need to write something that would give the same result as:

var result = collection.Where( o => o.Name.IndexOf( \"some_string2\" ) != -1 || o.Name.Index         


        

Answer 1

If you want to check whether o.Name contains some string from the stringsToCheck, I would suggest to use LinqKit and build the query with PredicateBuilder.

var predicate = PredicateBuilder.False();
var stringsToCheck = someCommaSeparatedStrings.ToLower().Split( ',' ).ToList();

foreach(var str in stringsToCheck)
{
     var tmp = str; 
     predicate = predicate.Or(o=> o.Name.IndexOf(tmp) != -1);
} 
resultQuery = collection.Where(predicate);