asp.net - When can I delete a file after using it in Response.WriteFile()?

Question

Is the WriteFile call properly synchronous, and can I delete the file written immediately after the call?

Answer 1

If you're writing a file to the client with Response.WriteFile(), a call to Response.Flush() will make sure it's been fully output to the client. Once that's done you can delete it off of the webserver.

You may want to come up with a more robust system if the file is mission-critical. Say, a client-side script to validate that the file was received OK and then alerts the webserver that the file can be deleted.