Azure Exception Details: System.Data.SqlClient.SqlException: Login failed for user 'null'

Question

I wrote an app and I am trying upload it on Azure. The app runs ok locally and has a SQL Server database as the backend; the app is based off MVC.

When I try to access a

Answer 1

On the app's data connection, the connection string had no userid. Adding a userid fixed the issue. Even though when the app was published with a proper connection string, the user id was empty.