具有 SQL 服务器凭据的数据库优先实体框架？

Question

Does anyone know of any way in which a database-first Entity Framework dbcontext can be implemented using SQLCredential? (you cannot pass a new SqlConnection with an allowable connection string - they are rejected).
Code-first will allow this, but not database-first. Basically, I can't create a database-first connection string that allows a new SqlConnection to instantiate correctly nor do I have decrypted credentials available to me. I am completely open to ideas.

Sample (model exists in dll, as database-first):

public partial class Entities : DbContext
{
    public Entities(string connStr, SqlCredential creds)
        : base(new SqlConnection(connStr, creds), true)
    {
    }

Answer 1

The answer is: No, you can't. Because entity framework doesn't use sqlclient namespace internally and inherits from Common instead. The only way to do it is a string replace method in the connection string itself.