Question

I have this LINQ query and I need to make a second Join to it:

var linqQuery = (from r in gServiceContext.CreateQuery("opportunity")
    join c in gServiceContext.CreateQuery("contact") on ((EntityReference)r["new_contact"]).Id   equals c["contactid"] into opp
    from o in opp.DefaultIfEmpty()
    where ((EntityReference)r["new_channelpartner"]).Id.Equals(lProfileProperty.PropertyValue) && ((OptionSetValue)r["new_leadstatus"]).Equals("100000002")
    select new

But I need to also Join this:

from r in gServiceContext.CreateQuery("annotation")
    join c in gServiceContext.CreateQuery("opportunity") on ((EntityReference)r["objectid"]).Id equals c["opportunityid"]

Sorry, I’m sure this is easy. I suck at LINQ though. Any help would be great.

Thanks!

Answer 1

It’s not really clear what you mean, but I suggest you want:

var linqQuery = from r in gServiceContext.CreateQuery("opportunity")
                where ...
                join c in gServiceContext.CreateQuery("contact")
                   on  ((EntityReference)r["new_contact"]).Id
                   equals c["contactid"] into opp
                from o in opp.DefaultIfEmpty()
                join r in gServiceContext.CreateQuery("annotation")
                   on c["opportunityid"]
                   equals ((EntityReference)r["objectid"]).Id
                select new...

It’s not clear why you have to cast to EntityReference everywhere and access fields via their names as strings, by the way. Are you sure you can’t use something like:

var linqQuery = from opportunity in gServiceContext.Opportunities
                where opportunity.ChannelPartner.Id == targetChannelPartner
                   && opportunity.NewLeadStatus == 100000002
                join contact in gServiceContext.Contacts
                  on opportunity.Id equals contact.Id into contacts
                from contactOrNull in contacts.DefaultIfEmpty()
                join annotation in gServiceContext.Annotations
                  on annotation.ObjectId equals opportunity.OpportunityId
                select ...;