LINQ is it possible to add where clauses dynamically

Question

I want to search my db with different keys. According to the input, there may be 1 key to 10 keys. Is there a way to add OR/AND clauses to my Linq query dynamically?

Answer 1

You can do something like this. Remember it may casue some overhead

 var students = ctx.Students;

 if (!String.IsNullOrWhiteSpace(SearchParams.Name))
      students = from s in students where s.Name.StartsWith(SearchParams.Name)

 if (!String.IsNullOrWhiteSpace(SearchParams.Surname))
      students = from s in students where s.Surname.StartsWith(SearchParams.Surname)