Binding datagridview to a multiple table linq-to-sql query

Question

I\'m binding the results of a linq-to-sql query to a datagridview. This works fine if I\'m just selecting from a single database table. However, if it\'s a join query where

Answer 1

What I've done is create a display class, taking the linq to sql table objects as arguments to the constructor and then just wrapping the properties I wanted to display. For example, the following class where I wanted to allow edits to the street and city, but also display the application number and status:

public class AddressDisplay
{
    private Retailer _retailer;
    private BusinessAddress _address;

    public AddressDisplay(Retailer retailer, BusinessAddress address)
    {
        _retailer = retailer;
        _address = address;
    }

    public string ApplicationNumber
    {
        get { return _retailer.ApplicationNumber; }
    }
    public string Status
    {
        get { return _retailer.Status; }
    } 
    public string Street
    {
        get { return _address.Street1; }
        set { _address.Street1 = value; }
    }
    public string City
    {
        get { return _address.City; }
        set { _address.City = value; }
    }
}

and then return instances of AddressDisplay to bind to the DataGridView:

var addresses = from a in _context.BusinessAddresses
                join r in _context.Retailers on a.ApplicationNumber equals r.ApplicationNumber
                where a.City == city
                select new AddressDisplay(r, a);

HTH