Question

I have a collection of this object :

public Class MyObject()
{
    public int Id { get; set; }
    public int Code { get; set; }
    public string NL { get; set; }
    public string FR { get; set; }
    public string Value { get; set; }
}

I have this

IList<MyObject> listObject = new List<Object>();
bool res = MyMethod();

I’d like depending of the res result copy all the value of FR to Value and from NL to Value if res is false :

I try this :

var res = (from p in listObject select new { Id = p.Id, Value = ??????  });

the ?????? reprsent the code I don’t find 🙁

Any idea ?

Thanks,

UPDATE1
I made a more generic method :

  public void MyTest<T>(IList<T> list) where T : ILookup
    {

        bool res = MyMethod();
        var result = (from p in list select new { Id = p.Id, Value = res? p.FR : p.NL });
        return result;

    }

What is the return type ?

Answer 1

A conditional or ternary operator will help here. An example of how it work is:

var result = booleanExpression ? valueIfTrue : valueIfFalse;

applied to your code it would look something like this:

var copy = (from p in listObject select new { Id = p.Id, Value = res ? p.FR : p.NL}); 

If you wish the result to be returnable from the method you will have to use a class with your select statement rather than createing an anonymous type:

var copy = (from p in listObject select new MyObject { Id = p.Id, Value = res ? p.FR : p.NL}); 

where MyObject has properties defined as Id and Value. You could then return it as

IEnumerable<MyObject >.