CFDirectory -> increment

[TheStig99]

Is anyone able to give me a sample script, such that if it finds an existing file, I can create a file with an incremented number.

Not sure exactly how to phrase the question but here's an example:

The following files exist:

file01.dat

file02.dat

file03.dat

I want to now create the next file in sequence based on the existance of the above files:

file04.dat

Can someone provide some sample code as to how can I use cfdirectory to come up with "file04.dat"?

Thanks

[TheStig99]

Ok I resolved it myself, this seems to work:

<cfdirectory directory="#app.folder#" action="list" filter="file*.dat" listinfo="name" name="dirQuery">

<cfoutput>#NumberFormat(dirQuery.RecordCount + 1,"0_")#</cfoutput>