Question

What is wrong with my linq statement, what am I doing wrong?

if (this.selectLBU.HtUsers.Any())
{
    reportRowItems = (from r in reportRowItems
                      from bu in r.User.HtBusinessUnits
                      where bu.LocationBusinessUnitId == selectLBU.LocationBusinessUnitId).ToList();

Answer 1

You need to add select clause to tell what data you require from query. This msdn article describes the basic query operation and structure.

 reportRowItems = (from r in reportRowItems
                   from bu in r.User.HtBusinessUnits
                   where bu.LocationBusinessUnitId == selectLBU.LocationBusinessUnitId 
                   select r 
                  ).ToList();

To get combination of both tables you can use projection.

reportRowItems = (from r in reportRowItems
                   from bu in r.User.HtBusinessUnits
                   where bu.LocationBusinessUnitId == selectLBU.LocationBusinessUnitId 
                   select new {r.AttributeName1, r.AttributeName2, bu.AttributeName1}
                  ).ToList();