Entity datasource filter - asp.net

Question

I have an entity datasource and i would like to filter it (created_on) to show only the max date. How do i go about doing it?
<asp:EntityDataSource ID="Payroll_DetailsDS" runat="server"
ConnectionString="name=sspEntities" DefaultContainerName="sspEntities"
EnableDelete="True" EnableFlattening="False" EnableInsert="True"
EnableUpdate="True" EntitySetName="Payroll_Details"
OrderBy="it.[Payslip_no] desc" EntityTypeFilter="" Select=""
Where="it.Status = "COM"">
</asp:EntityDataSource>
Right now the data source is only filtering by it.status. I would to filter also by it.created_on = Max(created_On) .. thats the idea of what i want, dont know how to get it.
i was able to get something similar in linq and it worked fine. just need it in entity datasource.
var testquery = from d in context.Payroll_Details
where d.Created_on == ((from b in context.Payroll_Details
where b.Employee_Personal_InfoEmp_id == xyz.PD_EmpPersonal_Id
select b.Created_on).Max())
select new
{
d.Employee_Personal_InfoEmp_id,
d.Basic_Pay_YTD
};
var r = testquery.SingleOrDefault();

Answer 1

If I undertand you right, you can use this way:
<asp:EntityDataSource ID="SalesOrderHeader" runat="server"
ConnectionString="name=AdventureWorksEntities"
DefaultContainerName="AdventureWorksEntities" EnableDelete="True"
EnableInsert="True" EnableUpdate="True" EntitySetName="SalesOrderHeader"
EntityTypeFilter="" OrderBy="it.TotalDue DESC" Select=""
Where="it.OnlineOrderFlag = TRUE AND it.TotalDue > #ordercost">
<WhereParameters>
<asp:ControlParameter ControlID="costLimit" DbType="Int32"
DefaultValue="2500" Name="ordercost" PropertyName="Text" />
</WhereParameters>
</asp:EntityDataSource>
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.entitydatasource.orderby.aspx