Question

I have two tables:

Relationships (ID,   UserID,   Type,   Contact ID)   

Contacts (ID,   Name,  Address) 

When the type is 5 in Relationship table, Contact ID is the ID in the Contacts table.

I want to get all the contacts information for a particular user

Here is what I have :

IEnumerable<Relationship> rels  = user.Relationships.Where(r => r.Type==5)
foreach (Relationship r in rels)
{
            contact = contactRepository.Find(r.ContactID);  // Returns Contact Object 
            Relation relation = new Relation(r, contact);   
            RelationList.Add(relation);

 }

Is this correct way to do this?

I have seen other post mentioning TPC. However, I did not quite understand all that and it seemed TPC only works for code first process.

Answer 1

You can user followng linq statement to get the contacts of a given userID (let’s say UserID=15) by using relatonships and contacts tables:

var contacts=from r in Relationships
             join c in Contacts on r.ContactID equals c.ID
             where r.Type=5 and r.UserID=15
             select c;