Cannot insert the value NULL into column 'RoleId' (mvc4 simple membership)

Question

I noticed that someone else has faced the same problem such as Cannot insert the value NULL into column 'UserId' but it should be caused by different reasons.

Th

Answer 1

1) Why are you using DbContext to add Roles to user? There are some native Membership methods to do it:

Roles.AddUsersToRole(string[] usernames, string rolename)
Roles.AddUserToRole(string username, string rolename) //**This one fits your purpose
Roles.AddUserToRoles(string username, string[] rolenames)
...

2) Value in key column can't be null

3) Int can't be null in C#. If you want to set null value to int, you should define it as nullable: int?