Using Interface to convert objects

Question

I have this entity class Map and I have created another partial class that implements the interface which basically carries common properties that is shared among classes.

namespace entity
{
    public partial class Map
    {
        public Guid Id { get; set; }

        public DateTime date1 { get; set; } 

        public DateTime date2 { get; set; } 

        public int? test1 { get; set; }

        public int? test2 { get; set; }

    }

    public partial class Map : ICommonFields 
        {

        }

}

namespace Test
{
    public interface ICommonFields
    {
        Guid Id { get; set; }

        DateTime date1 { get; set; } 

        DateTime date2 { get; set; } 

    }
}

Now, in my code I get List of class Map

check(List<Map>);

private void check(List<ICommonFields> co)
{
   // do something
}

I get this error

"cannot convert from system.collections.generic.list map to system.collections.generic.list ICommonfields"

How can I do this conversion, since I am only interested in common field Id, date1 and date2 ?

That's not a duplicate! Surely you need to use `Enumerable.Cast<>` — 3-14159265358979323846264, Sep 08 '16 at 14:16

score 1 · Accepted Answer · answered Sep 08 '16 at 14:07

1

Your code lack a bit of explaination but if I understand it right whhat you want to do is

var myList = new List<Map>();

/* loading of myList */

check(myList.ToList<ICommonFields>());

answered Sep 08 '16 at 14:07

Pomme De Terre

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Using Interface to convert objects

1 Answers1