Showing Values in Nested a Grid

Many times I had came across a situation to  display Master-Detail in a grid. Normally we accomplish this by binding the Detailgrid  with on Item Data Bound of the Master Grid.

But if we have all Master Detail Data returning in a Collection,
for ex.
Order 1 , Customer1, OrderDate
   Item1 , Item Name, Item Price, Qty, Total Price
   Item2 , Item Name, Item Price, Qty, Total Price
   Item3 , Item Name, Item Price, Qty, Total Price
   Item4 , Item Name, Item Price, Qty, Total Price

Order 2 , Customer2, OrderDate
   Item1 , Item Name, Item Price, Qty, Total Price
   Item2 , Item Name, Item Price, Qty, Total Price
   Item3 , Item Name, Item Price, Qty, Total Price
   Item4 , Item Name, Item Price, Qty, Total Price

Order3 , Customer3, OrderDate
   Item1 , Item Name, Item Price, Qty, Total Price
   Item2 , Item Name, Item Price, Qty, Total Price
   Item3 , Item Name, Item Price, Qty, Total Price
   Item4 , Item Name, Item Price, Qty, Total Price

we can link
1) Create a User Control with a Property for Example Orders
Eg:
public object Orders
{
   set
   {
      if (value is Order )
      {
         rptDetail.DataSource = ((Order)value).OrderItems;
         rptDetail.DataBind();
      }
   }
}

And in the ASPX page when calling the grid, pass the Parameter Orders with 'Container.DataItem'

Eg:
EP:UCOrderItems ID="ucOrderItems" runat="server" Orders=''/>

This will bind the collection to the child grid