Just before our upcoming release of Q1 2010 SP1 (early next week), Ive decided to check how RadGridView for WPF will handle complex Entity Framework 4.0 query with almost 2 million records:

public  class  MyDataContext{    IQueryable _Data;    public  IQueryable Data    {        get        {            if  (_Data ==  null)            {                var northwindEntities =  new  NorthwindEntities();                var queryable = from o  in  northwindEntities.Orders                                from od  in  northwindEntities.Order_Details                                select  new                                {                                    od.OrderID,                                    od.ProductID,                                    od.UnitPrice,                                    od.Quantity,                                    od.Discount,                                    o.CustomerID,                                    o.EmployeeID,                                    o.OrderDate                                };                _Data = queryable.OrderBy(i => i.OrderID);            }             return  _Data;        }    }}

The grid is bound completely codeless in XAML using RadDataPager with PageSize set to 50:

<Window  x:Class="WpfApplication1.MainWindow"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
  Title="MainWindow"  mc...

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