What is the proper exception to throw if an ODBC driver cannot be found

问题

I have the following code that searches for installed Microsoft Access drivers:

var odbcRegKey = Registry.LocalMachine.OpenSubKey(
    "SOFTWARE\\ODBC\\ODBCINST.INI\\ODBC Drivers", false);
var drivers = new List<string>(odbcRegKey.GetSubKeyNames());
if (drivers.Contains("Microsoft Access Driver (*.mdb, *.accdb)"))
{
    MicrosoftAccessProvider = "Microsoft Access Driver (*.mdb, *.accdb)";
}
else if (drivers.Contains("Microsoft Access Driver (*.mdb)"))
{
    MicrosoftAccessProvider = "Microsoft Access Driver (*.mdb)";
}
else
{
    //TODO: Throw some kind of excception
}

What is the proper exception to throw if it cannot find the ODBC driver? There are no public constructors for OdbcException()

回答1:

When in doubt, InvalidOperationException is my go-to choice. If it's something configurable (perhaps being able to use something other than Access), consider ConfigurationException as well.

回答2:

It is pretty rare for it to make sense to try to continue running a program in cases like this. Whatever code catches this exception won't know how to install the provider either. MessageBox.Show() and Environment.Exit() is then appropriate. Only ever consider throwing an exception if the program can limp along without a dbase.

回答3:

I would actually throw like this:

throw new NotSupportedException("ODBC Driver not found!");

来源：https://stackoverflow.com/questions/7221703/what-is-the-proper-exception-to-throw-if-an-odbc-driver-cannot-be-found