Connecting to SQL Server database from a .net application

I need to add a new form to an application which requires access to SQL Server to retrieve data from a single view and display it to the user. This application is an enterprise level application with ~1000 users. I assume the best practice is to ask DBA to provide a system account with non-expiring password so I can use it to connect to the SQL Server. Is there any other alternative to using SQL Database account? How should I write the connection string in my code?