We are using a unique way of deriving Global ID's on our tables, because we have several individual locations that are now harvesting information bac to a central location. Each location has a unique Id (SalonId) and each table has an incrementor ID (Object Id) To identify this object globally we use the following code:

private long Generate(int _salonId, int _objectId) {
try {
if (_objectId < 0) {
_salonId++;
}
Int64 GlobalId = System.Convert.ToInt64(_salonId);
GlobalId = (GlobalId << 32) + System.Convert.ToInt64(_objectId);
return (long)GlobalId;
} catch (Exception ex) {
throw new Exception("GlobalId Generation failed: salonId" + _salonId + " objectId:" + _objectId, ex);
}
}

Because of a change in scope I now need these GlobalId to be used locally and genertered automatically when creating new records. The problem is I do not yet have a ObjectId unitl Save, also we need to use these GlobalId as contraint Fields.

My question is how can I create a customer Id Generator Class that can Generate these Id's and allow me to automatically create them on Save. An then support relationships and cascading?

Thank You.

Toby

why don't you use Guid's as identifier? These are unique over different systems per definition. So you can avoid defining a custom identifier.

Regards
Klaus