Question

Using an <input type="file" name="fileUpload"> I can get the file path by using Request.MapPath and storing it in a string. But when I do:

string file = Request.MapPath(Request.Form["fileUpload"]);
Attachment.Add(new Attachment(file));

I get the ‘Could not find a part of the path’ error. What an I missing in getting the file or attaching the file to the MailMessage object?

Answer 1

I believe you cannot do that because the file has not been written to the server disk; that is, it is buffered in memory. Try this:

var destination = Path.GetTempFileName(); // you should probably replace this with a directory the IIS Worker Process has write permission to
try {
Request.Files[0].SaveAs(destination);

Attachment.Add(new Attachment(destination));
// Send attachment
} finally {
File.Delete(destination);
}