SSIS: Flat File Source With Wildcarded Filename

My task is to write an SSIS package that picks up just one file from a directory and loads it into a database table. The filename is defined as being "ABC*.txt". So I must pick up only one file that matches that wildcard.

I can see two ways of doing this, but I can't get either to work:-
1. Use a Flat File Source connection and put the wildcard in the ConnectionString.
i.e. ConnectionString = "C:\mydirABC*.txt"
But SSIS doesn't seem to support that.
2. Use a Foreach Loop Container with a Foreach File Enumerator, and configure the enumerator as:-
Folder = c:mydir
Files = ABC*.txt
This works well, but loops round for as many files match the wildcard. Is there any way of forcing it to drop out after the first time round the loop?

Or am I missing a much easier solution?
Thanks.