protected void AsyncFileUpload1_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e) { string lastFile = ""; try { lastFile = Request.Cookies["lastFile"].Value; } catch { } string lastTicket = ""; try { lastTicket = Request.Cookies["lastTicket"].Value; } catch { } string fileExt = UploadedFile.GetFileExtention(AsyncFileUpload1.FileName); // The user had uploaded a second file see if one with the id and any extension exists and delete it to make room for the new one UploadedFile.DeleteExistingFiles(lblIndex.Text); if (UploadedFile.FileExtentionAllowed(fileExt)) { //Get real path to upload files to if (lastFile != AsyncFileUpload1.FileName || lastTicket != lblIndex.Text) { if (lblIndex.Text != "") { try { DirectoryInfo root = new DirectoryInfo(UploadedFile.filePath); FileInfo[] listfiles = root.GetFiles(lblIndex.Text + "*"); Array.Sort(listfiles, delegate(FileInfo listfile1, FileInfo listfile2) { return(listfile1.Name.CompareTo(listfile2.Name)); }); if (listfiles.Length != 0) { string currentFile = listfiles[listfiles.Length - 1].FullName; int currentFileNumber = int.Parse(currentFile.Split('_')[1].Split('.')[0]); currentFileNumber++; string nextFileNumber = currentFileNumber.ToString(); if (currentFileNumber < 10) { nextFileNumber = "0" + nextFileNumber; } if (UploadedFile.FileExtentionAllowed(fileExt)) { if (currentFileNumber <= UploadedFile.MaxUploads()) { AsyncFileUpload1.SaveAs(UploadedFile.filePath + lblIndex.Text + "_" + nextFileNumber + "." + fileExt); } else { AsyncFileUpload1.SaveAs(UploadedFile.filePath + lblIndex.Text + "_" + UploadedFile.MaxUploads() + "." + fileExt); } } else { lblFileIssue.Visible = true; } } else if (UploadedFile.FileExtentionAllowed(fileExt)) { AsyncFileUpload1.SaveAs(UploadedFile.filePath + lblIndex.Text + "_01." + fileExt); } } catch (Exception ex) { } } } } ClearContents(AsyncFileUpload1 as Control); Response.Cookies["lastFile"].Value = AsyncFileUpload1.FileName; Response.Cookies["lastFile"].Expires = DateTime.Now.AddDays(1); Response.Cookies["lastTicket"].Value = lblIndex.Text; Response.Cookies["lastTicket"].Expires = DateTime.Now.AddDays(1); }