Question

My unit of work object has 2 dependencies, a connection and a transaction. The transaction needs a connection in order for it to be bound. Unsure of how to handle this situation.

public class UnitOfWork : IUnitOfWork
{
    public IDbConnection Connection { get; set; }
    public IDbTransaction Transaction { get; set; }

    public UnitOfWork(IDbConnection connection, IDbTransaction transaction)
    {
        this.Connection = connection;
        // In order to create the transaction, it needs the passed in IDbConnection.
    }

    public void Commit()
    {

    }

    public void Rollback()
    {

    }
}

How would I handle this situation?

Bind<IDbTransaction>().To<SqlTransaction>();

Answer 1

You can bind it like this. In way that IDbTransaction will be tied to IDbConnection.

var kernel = new StandardKernel();
kernel.Bind<IDbConnection>()
      .To<SqlConnection>()
      .WithConstructorArgument("connectionString", connectionString);
kernel.Bind<IDbTransaction>()
      .ToMethod(x => x.Kernel.Get<IDbConnection>().BeginTransaction());

But I don’t see any reason why should you do this like that. You can simply use Connection.BeginTransaction() inside your UnitOfWork and remove that dependency on IDbTransaction from constructor.