Link to home
Start Free TrialLog in
Avatar of MrNMrsGeek
MrNMrsGeek

asked on

How to create custom ID generator for Entity Framework?

How can I create a custom ID generator for Entity Framework to use a unique string for a primary key?

My client has a requirement that all tables must contain a primary key of a GUID but to be stored as a CHAR(32) without dashes for braces.  Currently, I am having to manually stuff the PK values manually while instantiating entities and/or adding them to collections.  I would really like for Entity Framework to call a small piece of custom logic to create the primary key AND have this generator available in the Designer for model-first design:

id = Guid.NewGuid().Replace("-", "").Replace("{", "").Replace("}", "");

Open in new window

ASKER CERTIFIED SOLUTION
Avatar of Meir Rivkin
Meir Rivkin
Flag of Israel image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of MrNMrsGeek
MrNMrsGeek

ASKER

Not exactly a generator.  Not exactly what I wanted.  However, this works, I guess.  I was specifically looking for a generator.  Overriding SaveChanges is a hack in that I must either (a) force all of my types to have the same property, or (b) check the entity type within SaveChanges to find all custom types that have said property, or (c) use Reflection to determine IF the object has the property.  None of these are what I want.  My only reason for awarding this as a solution was because it is not sedgwick's fault.