How to Upload a file automatically

public void resumeinsert()
    {
        //checking Filename is null or not
        if (fileuploadresume.FileName != "")
        {
            //file storing in folder
            string filePath = Server.MapPath("~/pp/") + fileuploadresume.FileName;
            string ext = Path.GetExtension(fileuploadresume.FileName);

            switch (ext)
            {
                case ".doc":
                    contenttype = "application/vnd.ms-word";
                    break;

                case ".docx":
                    contenttype = "application/vnd.ms-word";
                    break;
            }
            //creating file
            fileuploadresume.SaveAs(filePath);
            FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            BinaryReader br = new BinaryReader(fs);
            bytes = br.ReadBytes((Int32)fs.Length);
            br.Close();
            fs.Close();
            HttpPostedFile myFile = Request.Files[0];
        }

    }