private CRecord AttachWithRelations(CRecord entity, InsertMode insertMode = InsertMode.Attach, MergeOption mergeOption = MergeOption.AppendOnly, List <object> referenceTrackingList = null)
{
#region iteration tracking
if (ReferenceEquals(null, referenceTrackingList))
{
referenceTrackingList = new List <object>();
}
if (referenceTrackingList.Contains(entity))
{
return(_cRecords.GetExisting(entity));
}
else
{
referenceTrackingList.Add(entity);
}
#endregion
#region add/attach entity
CRecord existingEntity = null;
switch (insertMode)
{
case InsertMode.Add:
existingEntity = _cRecords.Add(entity);
break;
case InsertMode.Attach:
existingEntity = _cRecords.Attach(entity);
break;
default:
throw new Exception(string.Format("Implementation Exception: missing action for {0}", insertMode));
}
if (!ReferenceEquals(null, existingEntity) && ReferenceEquals(existingEntity, entity))
{
return(existingEntity);
}
#endregion
#region attach relations recursively
#endregion
#region refresh existing entity based on merge options
if (!ReferenceEquals(null, existingEntity) && !ReferenceEquals(existingEntity, entity))
{
if (CRecords.MergeOption == MergeOption.OverwriteChanges)
{
Invoke(delegate
{
existingEntity.Refresh(entity, trackChanges: false);
existingEntity.AcceptChanges();
});
}
else if (CRecords.MergeOption == MergeOption.PreserveChanges)
{
Invoke(delegate
{
existingEntity.Refresh(entity, trackChanges: false, preserveExistingChanges: true);
});
}
}
#endregion
return(existingEntity);
}