Retrieve data from N-N relationship in CRM

Sharing a sample code to retrieve data from N-N relationship in CRM. We have a trainer profile which have N-N relationship with Centre that means one trainer can visit to multiple centre and one centre can be assigned to multiple trainers. Here we are trying to retrieve list of centres associated with particular trainer.

List<Centre> centreList = new List<Centre>();
QueryExpression query = new QueryExpression(“mc_centre”);
query.ColumnSet = new ColumnSet(new string[] { “mc_centreid”, “mc_name” });

LinkEntity linkEntity1 = new LinkEntity(“mc_centre”, “mc_mc_trainer_mc_centre”, “mc_centreid”, “mc_centreid”, JoinOperator.Inner);
LinkEntity linkEntity2 = new LinkEntity(“mc_mc_trainer_mc_centre”, “mc_trainer”, “mc_trainerid”, “mc_trainerid”, JoinOperator.Inner);


linkEntity2.LinkCriteria = new FilterExpression();
linkEntity2.LinkCriteria.AddCondition(new ConditionExpression(“mc_trainerid”, ConditionOperator.Equal, new Guid(trainerId)));

EntityCollection centreCollection = service.RetrieveMultiple(query);
if (centreCollection.Entities.Count > 0)
foreach (var centre in centreCollection.Entities)
Centre cr = new Centre();
cr.centreId = centre.Attributes[“mc_centreid”].ToString();
cr.centreName = centre.Attributes[“mc_name”].ToString();

return centreList

Author: Arvind Singh

Microsoft Dynamics CRM Consultant

Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s