通过LINQ查询选择新类，如何转移到另一个模型？

Question

I'm really not understanding this as I've only dabbled in MVC and C#. I apologize if my terminology is wrong or confusing, I will do my best to answer questions. I have a couple models like so:

 public class DataSharingModels
{
    public string ReferenceID { get; set; }
    public NBTC NBTCGroup { get; set; }
    public Contractors ContractorsGroup { get; set; }
    public Coordinators CoordinatorsGroup { get; set; }
    public NGO NGOGroup { get; set; }
    public Public PublicGroup { get; set; }
    public SelectList FA_RA_List { get; set; }

}

public class NBTC
{
    public String NBTC_FA_Centroid { get; set; }
    public String NBTC_FA_Bound { get; set; }
    public String NBTC_RA_Centroid { get; set; }
    //more properties...
 }

The DataSharingModels class contains the public NBTC NBTCGroup property. It is not public List<NBTC> NBTCGroup because there will only be one produced per instance of the controller being hit.

Now in my controller, I have a LINQ statement that selects a new NBTC class:

var nbtcVals = (from ds in db.SharingPermissions
                        where ds.FocalRefID.ToString() == ReferenceID
                        && ds.ShareGroup == "NBTC"
                        select new NBTC
                        {
                            NBTC_FA_Centroid = ds.CIP_FA_Centroid,
                            NBTC_FA_Bound = ds.CIP_FA_Boundary,
                            NBTC_RA_Centroid = ds.CIP_RA_Centroid,
                            //more properties...
                        });

Where I'm going wrong is I would like to add that to my DataSharingModels model. I thought the nbtcVals type would be NBTC, but it's IQueryable<##.Models.NBTC>. I understand I could do this, but it seems redundant:

        DataSharingModels dsm = new DataSharingModels();

        if (nbtcVals.Any())
        {
            foreach (var i in nbtcVals)
            {
                dsm.NBTCGroup.NBTC_FA_Centroid = i.NBTC_FA_Centroid;
                dsm.NBTCGroup.NBTC_FA_Boundary = i.NBTC_FA_Bound;
                dsm.NBTCGroup.NBTC_RA_Centroid = i.NBTC_RA_Centroid;
                //more properties...
            }
        }

What is a more direct way to do this? There must be one. I supposed I could also return an anonymous type in the LINQ query and then assign each property in the foreach like dsm.NBTCGroup.NBTC_RA_Centroid = i.NBTC_RA_Centroid but that seems the same as the other way.

Answer 1

var nbtcgroup = (from ds in db.SharingPermissions
                        where ds.FocalRefID.ToString() == ReferenceID
                        && ds.ShareGroup == "NBTC"
                        select new NBTC
                        {
                            NBTC_FA_Centroid = ds.CIP_FA_Centroid,
                            NBTC_FA_Bound = ds.CIP_FA_Boundary,
                            NBTC_RA_Centroid = ds.CIP_RA_Centroid,
                            //more properties...
                        })
              .OrderByDescending(n => n.Id) // or some other property that could identify sorting
              .FirstOrDefault();

This one has a translation to SQL (LIMIT or TOP depending on backend).