Question

I have the below method and I want to try add in String.Compare

public List<Group> GetStudentCollectionByGroup(string anything)
{
    List<Group> groups = (from g in Groups
                          where 
                              (from t in g.Groupsz 
                              where t.StudentID == anything 
                                 || t.FirstName == anything 
                                 || t.LastName == anything select t).Count() > 0
                 select g).ToList();

        return groups;
    }

If I try != rather than == on my client side whatever I type in the textbox I somehow get a return of the groups no matter what is typed. If I use == it will only return the group associated with what I type (belonging to that student ofcourse) so im hoping the String.Compare might help I just dont know how to construct the above code with it?

Answer 1

If you replace == with != you are saying “return any t that has a student id other than anything, or a first name other than anything, or a last name other than anything” the only record that could fail that check would be (anything, anything, anything).

What you want is a case insensitive comparison.

string.Equals(t.FirstName, anything, StringComparision.CurrentCultureIgnoreCase);