i'm on a task where I need to create a file serverside and move this file to an USB key.
Is it possible to copy a file from a webserver to an USB Key ? (any security issues)
Furthermore the user needs to indicate to which path the file needs to be saved on. Is there a control like the asp upload control, where the user can browse to the right directory or is the simple solution to use a textbox, where the user can write e.g. "E:\mygeneratedfiles"
The USB key is on the users local machines
From the ASP.NET perspective, you can return the file in HTTP response, but once the file is sent to the client web browser, you're pretty much out of luck.
There might be something you can do with javascript to streamline the saving process (not my area of expertise), but accessing the client's filesystem directly, especially writing to it, is out of the question. If you want to do that you'll have to write an ActiveX control or similar type of plugin.
Edit:
For returning the file in the HTTP response, load your file in to a 1-dimensional byte array and use the following code pattern:
context.Response.Clear()
context.Response.AddHeader("content-disposition", "attachment;filename=" & objFile.FileName)
context.Response.BinaryWrite(objFile.FileImage)
context.Response.End()
In this example objFile.FileName is the file name string and objFile.FileImage is a Byte array containing the file. context is the current HttpContext.
