Updating your edmx to reflect changes made in your db (.net linq-to-entities)

Question

• So I have my edmx made.
• Then I change my database a little bit, changing a column to from being a NOT NULL to allowing NULL.
• I go into my edmx, rig

Answer 1

What I have successfully done is this (VB.Net).

1. make updates to the database as desired/ required
2. Choose "Update from database" in the EDMX model, the graphical model will correctly show the new structure/tables
3. Expand the project so that it shows all related files
4. The two files with the "tt" extension are the ones that matter: first take the one WITHOUT the .Context. before the tt extension. right click on it and choose Run Custom Tool:

5. Do the same for the .tt file with the .Context. in its name. All of your code and logical model classes will be updated.