Entity Framework, one-to-many, several columns - entity-framework

Question

If I have a main table, lets say orders, and a sub table of items and the items table has a fields for item number BUT it also has a nullable (optional) field for color that applied only to certain items. How would I update the items table, at the same time as the orders table, using Entity Framework?
Here is a code example of what I have so far. Two problems, I'm only entering one of my items and, from what my research indicates, I can't add another field to the items table?
foreach (Guid c in AllItems)
{ Items.OrderItemID = Guid.NewGuid();
ITemsOrderID = order.OrderID;
ITems.ItemID = c;
If (ItemID = ItemThatLetsYouChoseAColorID)
{
Items.ItemColorID = ColorID;
} else {
Items.ItemColorID = null;
}
}
context.Orders.AddObject(Orders);
context.Items.AddObject(Items);
context.SaveChanges();
My Orders table gets a record inserted, and the Items gets ONE record inserted. I'm missing something basic here, I'm afraid. BTW, this is Entity Framework 4.0, which. I believe, does not require the use of EntityKey.

Answer 1

You're adding an object to the Items collection only one time after the scope of your foreach.
Have you tested something like:
foreach (Guid c in AllItems)
{
var Item = new Item();
Item.OrderItemID = Guid.NewGuid();
Item.OrderID = order.OrderID;
Item.ItemID = c;
If (ItemID = ItemThatLetsYouChoseAColorID)
{
Item.ItemColorID = ColorID;
}
else
{
Item.ItemColorID = null;
}
context.Items.AddObject(Items);
}
context.Orders.AddObject(order);
context.SaveChanges();
And I'm not sure to understand what you mean by
I can't add another field to the items table
You should be more precise about what you actually expect. Insert a row, add a column in the table...? What is a "field"?

Answer 2

Here is the working code. I had the new Item outside the foreach item loop, so was overwriting the value. Also, I need to add each one to the context. I had a hard time with this, hope it helps someone else:
<-fill the order object->
foreach (Guid i in Items)
{
**Items item = new Items();**
item.ItemID = Guid.NewGuid();
item.OrderID = order.OrderID;
if (i == ItemWithColorGuid)
{
foreach (Guid c in Colors)
{
**Items color = new Items();**
color.ItemsID = Guid.NewGuid();
color.OrderID = order.orderID;
color.itemID = g;
color.colorID = c;
context.item.AddObject(color);
}
}
else
{
item.ItemID = i;
item.ColorID = null;
context.item.AddObject(item);
}
}
context.orders.AddObject(order);
context.SaveChanges();