How to get first EntityKey Name for an Entity in EF4

Question

How can I get the 1st EntityKey name for an Entity for Entity Framework 4 because I\'m building a repository system and I wanted to get an item by Id (which is the primary key o

Answer 1

Try this:

/// 

/// Gets the entity key for the POCO Entity type.
/// 
/// The entity.
/// 
private EntityKey GetEntityKey(TEntity entity)
{
    ReadOnlyMetadataCollection keyMembers =
        this.ObjectSet.EntitySet.ElementType.KeyMembers;

    var entityKeyMembers = new List();

    //Construct the entity key for the POCO Entity type object.
    foreach (EdmMember keyMember in keyMembers)
    {
        object keyMemberValue = entity.GetType().GetProperty(keyMember.Name).GetValue(entity, null);
        entityKeyMembers.Add(new EntityKeyMember(keyMember.Name, keyMemberValue));
    }

    //Create the Entity key for our POCO Entity type object.
    return new EntityKey(this.ObjectSource.DefaultContainerName
        + "." + this.ObjectSet.EntitySet.Name, entityKeyMembers);
}

objectsource is objectcontext.