Upload Attachments with html upload control when asp.net upoload control presence To SharePoint Document library Programmatically

 private void UploadOtherAttachments()
        {
            try
            {
                    HttpFileCollection hfcFiles = Request.Files;
                    if (hfcFiles.Count > 0)
                    {
                        for (int i = 0; i < Request.Files.Count; i++)
                        {
                            string[] Files;
                            bool Flag = false;
                            HttpPostedFile PostedFile = hfcFiles[i];
                            string RequestFilename = "";
                            if (PostedFile != null && PostedFile.FileName != String.Empty &&PostedFile.FileName!=(fuID.PostedFile.FileName) && PostedFile.ContentLength > 0)
                            {
                                RequestFilename = PostedFile.FileName;
                                string[] Separator = { "\\" };
                                if (PostedFile.FileName.Contains(Separator[0]))
                                {
                                    Files = PostedFile.FileName.Split(Separator, StringSplitOptions.None);
                                    RequestFilename = Files[Files.Length - 1];

                                }

                                string strInputFileName = Path.GetFileNameWithoutExtension(PostedFile.FileName)
                                                          + "_" + Path.GetExtension(PostedFile.FileName);

                                SPList docLibrary = Web.Lists["Library"];
                                SPFolder OAFolder = null;
                                foreach (SPListItem item in docLibrary.Folders)
                                {
                    SPFolder folder = item.Folder;
                                    if (folder.Name == "folder1")
                                    {
                                    OAFolder = "name of the folder";
                    }   
                                }
                                string docLibraryUrl = OAFolder.Url.ToString();
                                string destinationURL = docLibraryUrl + "/" + strInputFileName;

                                SPFile file = null;
                                file = docLibrary.RootFolder.Files.Add(destinationURL, PostedFile.InputStream, true);
                                SPListItem newItem = file.Item;
                                newItem["fld1"] = txt1.Text;
                                newItem["fld2"] = txt2.Text;
                                Web.AllowUnsafeUpdates = true;
                                newItem.Update();
                                file.Update();
                                web.AllowUnsafeUpdates = false;

                            }

                            else
                            {

                                //_Errormsg = "Request created..Relevant document upload failed";
                            }
                        }
                    }
            }

            catch (Exception ex)
            {
                throw ex;
            }
        }