query = SampleBO.QueryByElements;
selectionParameters = query.CreateSelectionParams();
// set query parameter (retrieve all with RoleCode=="1215")
selectionParameters.Add( query.RoleCode , "I", "EQ", “1215”);
// execute query
queryResult = query.Execute(selectionParameters);
// get data by loop foreach (var item in queryResult)
{
this.EmployeeParty = item;
}