aha. That looks like gold dust.

One problem (well - probably thousands if I go that route, but one immediately hit me)

Microsoft's own guide to bulk inserts (which is somewhat less useful in about 20 pages than your own single page but we'll let that pass!) makes mention of the limitation that only users with sysadmin rights can use the bulk insert method.

As the point of my app is to let thousands of users upload their own keys to the database, and, obviously, we can't allow such users sysadmin rights, it would seem that the bulk insert method is not going to be open to me. Unless of course you know of a way around that problem.

If I understand the microsoft limitations correctly, I will still be able to make use of your code for related purposes but not for ordinary users to upload their keys.