Creating an Object that can be Consumed by ObjectDataSource

See the code below for an example object that can be consumed by ObjectDataSource.  Your object needs to be marked with the DataObjectAttribute for the object to be seen by Data Source Configuration Wizard. It also needs a method to select data marked by the DataObjectMethodAttribute (see GetProducts() method in the code sample). 

[DataObjectAttribute]
public class ProductsBO
{
    [DataObjectMethodAttribute(DataObjectMethodType.Select, true)]
    public static IEnumerable GetProducts()
    {
        SqlCommand command = new SqlCommand();
        String connectionString = @"Integrated Security=SSPI;Persist Security Info=False; Initial Catalog=Northwind;Data Source=.\sqlexpress";
        command.Connection = new SqlConnection(connectionString);
        command.CommandText = "SELECT CategoryName, SUM(ProductSales) AS TotalSales FROM [Product Sales for 1997] GROUP BY CategoryName";
        command.Connection.Open();
        SqlDataReader reader = command.ExecuteReader();
        return reader;
    }
}

<DataObjectAttribute()> _
    Public Class ProductsBO
        <DataObjectMethodAttribute(DataObjectMethodType.[Select], True)> _
        Public Shared Function GetProducts() As IEnumerable
            Dim command As New SqlCommand()
            Dim connectionString As [String] = "Integrated Security=SSPI;Persist Security Info=False; Initial Catalog=Northwind;Data Source=.\sqlexpress"
            command.Connection = New SqlConnection(connectionString)
            command.CommandText = "SELECT CategoryName, SUM(ProductSales) AS TotalSales FROM [Product Sales for 1997] GROUP BY CategoryName"
            command.Connection.Open()
            Dim reader As SqlDataReader = command.ExecuteReader()
            Return reader
        End Function
    End Class