File Upload and Download in ASP.NET

File Upload Code

string FilePath = "";
string[] a = new string[1];
string fileName = "";
string FullName = "";

if (FileUploader.FileName.Length > 0)
{
     a = FileUploader.FileName.Split('.');
     fileName = Convert.ToString(System.DateTime.Now.Ticks) + "." + a.GetValue(1).ToString();
     FilePath = Server.MapPath(@"~\SavedFolder");
     Fup1.SaveAs(FilePath + @"\" + fileName);

     FullName = FilePath + @"\" + fileName;
     // Database Saved Code
}

File Download Code

string filename = "filename from Database";
Response.ContentType = "application/octet-stream";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + filename);
string aaa = Server.MapPath("~/SavedFolder/" + filename);
Response.TransmitFile(Server.MapPath("~/SavedFolder/" + filename));
Response.End();