Categories:
runat="server"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT * FROM Categories">
runat="server"
DataSourceID="sourceCategories"
DataKeyNames="CategoryID">
Products in this category:
runat="server"
ConnectionString="<%$ ConnectionStrings:Northwind %>"
SelectCommand="SELECT ProductID, ProductName, UnitPrice FROM Products WHERE CategoryID=@CategoryID">
>