Question

I have added two datatable using persistent class in Devexpess

 XPQuery<me_employee> EmployeeQuery = new XPQuery<me_employee>(XpoDefault.Session);
 XPQuery<mr_role> EmployeeRoleQuery = new XPQuery<mr_role>(XpoDefault.Session);
 var employees = from emp in EmployeeQuery join empRole in EmployeeRoleQuery on emp.me_role_pkey equals empRole.mr_pkey 
 select new { emp.me_pkey, empRole.mr_role_name };

It throws an error saying.

"Specified Method is not supported"

how to user join in linq in Devexpress

Thanks

Answer 1

Here is the article which explains how to use join in XPQuery:

How to create and use the JoinOperand using LINQ to XPO and Criteria Operators