Connection Strings and Configuration Files

Sometimes you might see a variation of the service provider design that provides its connection string as a property or requires the connection string in its constructor. This design might seem like a good idea because it allows flexibility for the data access class to be used with different data sources or login information. However, this approach also creates its share of problems:

  • It introduces one more area in which the component will be susceptible to client mistakes.

  • It introduces one more area where security can be compromised because each client will need to know the database user ID and password.

  • It can threaten connection pooling because minor changes in the connection string result in the creation ...

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