In the FilterExpression, I noticed Telerik is using ")||(" instead of ")OR(". Evidently this works, but I believe the
recommendation is "OR". I only bring this up because in many situations, the RadGrid1.MasterTableView.FilterExpression can be used directly as the WHERE clause is in a SQL Query. SQL understands "OR", but not "||".
I'm using it for my where clause in my project to retrieve related data, so you might consider changing it just for me. :-)
In the meantime RadGrid1.MasterTableView.FilterExpression.Replace("||", "OR") is working well.
Thanks!