Remember to register the assemblies to ASP.NET pages

<%@ Register Assembly="Eco.Web" Namespace="Eco.Web.UI.WebControls" TagPrefix="eco" %>

 

<eco:EcoDataSource ID="EcoDataSource1" runat="server" EcoSpaceManagerID="ESM"

Expression="self-&gt;first" ManualUpdate="False"

PsExpression="Class1.allInstances">

<Columns>

<eco:OclColumn expression="self.Attribute1"

name="Attribute1" typename="n/a"></eco:OclColumn>

</Columns>

</eco:EcoDataSource>