Question

I am using Entity framework 4, SQLite database with database first approach. I have attached my table structure as a snapshot.

I am able to write/ read data in the Bnb_Company and Bnb_Player tables, but when I try to enter a row into the Bnb_Game table, I get the following error.

Entities in ‘MockStockDbEntities.Bnb_Game’ participate in the ‘Bnb_CompanyBnb_Game’ relationship. 0 related ‘Bnb_Company’ were found. 1 ‘Bnb_Company’ is expected.!

//Reset company values
if (context.Bnb_Company.Count() > 0)
{
    var companydetails = context.Bnb_Company.ToList();
    foreach (var company in companydetails)
    {
        company.ESC = 0;
        company.MarketValue = company.FaceValue;
    }
    context.SaveChanges();
}

if (context.Bnb_Player.Count() > 0)
{
    var playerDetails = context.Bnb_Player.ToList();
    //Reset Player values
    foreach (var player in playerDetails)
    {
        player.NetAmount = 0;
        player.Amount = 1000;
        if (context.Bnb_Company.Count() > 0)
        {
            var companyDetails = context.Bnb_Company.ToList();
            foreach (var company in companydetails)
            {
                if (context.Bnb_Game.Count() > 0 && (context.Bnb_Game.Where(b => b.PlayerId == player.Id && b.CompanyId == company.Id).Count() > 0))
                {
                    var specificCompanyShare = context.Bnb_Game.Where(b => b.PlayerId == player.Id && b.CompanyId == company.Id).FirstOrDefault();
                    specificCompanyShare.Shares = company.DefaultShares;
                }
                else
                {
                    Bnb_Game playerCompanyShare = new Bnb_Game();
                    playerCompanyShare.CompanyId = company.Id;
                    playerCompanyShare.PlayerId = player.Id;
                    playerCompanyShare.Shares = company.DefaultShares;
                    context.Bnb_Game.AddObject(playerCompanyShare);
                }
            }
        }

    }
    context.SaveChanges();
}

Answer 1

Try using the Entity reference instead of the the Id value.

 Bnb_Game playerCompanyShare = new Bnb_Game();
 playerCompanyShare.Bnb_Company = company;
 playerCompanyShare.Bnb_Player = player;
 playerCompanyShare.Shares = company.DefaultShares;
 context.Bnb_Game.AddObject(playerCompanyShare);