ASP with Flat Files

I have an ASP script that writes to a flat file.

Since my site will have several users, the ASP script could write
to the same flat file at one time with information from several users.

Is there a way that I can lock the flat file when it is being writen to
and then release it when finished, without losing the information that
is waiting?

Does anyone see a potential problem designing this way, with a flat
file, as compared to a structure DB? I may have approximately 100
simultaneous users writing to the file.

I wanted to avoid using a structure DB because my website is free
for users and I don't want to get into any complex design that will
cost me time.

Please help if you can. Thanks a lot.

Hi

You would be much better sticking with Microsoft Access. Text files are fine read-only. Because you would have to write routines to parse, update, delete and insert records (things that are native to Access) it would make your project overly complex

MK