LINQ - 比较List对象和字符串列表

Question

I have a list of objects ( List1 ) and list of string ( List2 - list of Names of the objects)

I need to get all objects from List1 if the object.Name does not exists in List2

How can write this LINQ C#.?

Answer 1

public class Class1
{
    public string Name {get;set;}
}

var List1 = new List<Class1>();
var List2 = new List<string>();
var result = List1.Where(x=>!List2.Contains(x.Name)).ToList();

Or:

var result = List1.Where(x=>!List2.Any(n=>n==x.Name)).ToList();

Answer 2

class Program
{
    static void Main(string[] args)
    {

        List<List1Class> listClass = new List<List1Class>();

        listClass.Add(new List1Class { ObjectName = "obj1" });
        listClass.Add(new List1Class { ObjectName = "obj2" });
        listClass.Add(new List1Class { ObjectName = "obj3" });
        listClass.Add(new List1Class { ObjectName = "obj4" });

        List<string> listString = new List<string>();
        listString.Add("obj2");
        listString.Add("obj4");
        listString.Add("obj5");

        var filterlist = listClass.Where(l => !listString.Contains(l.ObjectName)).ToList();

    }
}

class List1Class { public string ObjectName { get; set; }

    //Add other property
}