获取ms动态CRM中的关联记录

Question

Hi to get associated records from campaignlist_association in ms crm 2013. Tried tons of different variations.

This is last one:

System.Guid campaignId = ((EntityReference)entity.Attributes["regardingobjectid"]).Id;


var list = (from c in EntityCon.CampaignSet
            join l in EntityCon.ListSet on c.campaignlist_association equals l.campaignlist_association
            where c.CampaignId == campaignId select c).First();

Answer 1

The error message

The type of one of the expressions in the join clause is incorrect. Type inference failed in the call to 'Join'

indicates that the types of the properties used with the equals expression must match, eg that they are both Int32 or Guid .

Make sure that the type l.campaignlist_association is the same as the type c.campaignlist_association .

Answer 2

I would use code as follows to get the associated entity records. Change the column set as per your requirement.

private EntityCollection GetAssociatedEntityItems(string relationshipName, string relatedEntityName, string entityName, Guid entityId)
    {
        EntityCollection result = null;
            QueryExpression query = new QueryExpression();
            query.EntityName = relatedEntityName;
            query.ColumnSet = new ColumnSet(false);
            Relationship relationship = new Relationship();
            relationship.SchemaName = relationshipName;
            relationship.PrimaryEntityRole = EntityRole.Referencing;
            RelationshipQueryCollection relatedEntity = new RelationshipQueryCollection();
            relatedEntity.Add(relationship, query);
            RetrieveRequest request = new RetrieveRequest();
            request.RelatedEntitiesQuery = relatedEntity;
            request.ColumnSet = new ColumnSet(true);

            request.Target = new EntityReference
            {
                Id = entityId,
                LogicalName = entityName
            };
            RetrieveResponse response = (RetrieveResponse)serviceProxy.Execute(request);
            RelatedEntityCollection relatedEntityCollection = response.Entity.RelatedEntities;
            if (relatedEntityCollection.Count > 0)
            {
                if (relatedEntityCollection.Values.Count > 0)
                {
                    result = (EntityCollection)relatedEntityCollection.Values.ElementAt(0);
                }
            }
        return result;
    }