byte[] byte1 = FileUpload1.FileBytes;            byte[] byte2 = FileUpload2.FileBytes;            byte[] a1 = Encoding.UTF8.GetBytes("[");            byte[] a2 = Encoding.UTF8.GetBytes(",");            byte[] a3 = Encoding.UTF8.GetBytes("]");            byte[] totalaa = new byte[a1.Length + byte1.Length + a2.Length + byte2.Length + a3.Length];            a1.CopyTo(totalaa, 0);            byte1.CopyTo(totalaa, a1.Length);            a2.CopyTo(totalaa, a1.Length + byte1.Length);            byte2.CopyTo(totalaa, a1.Length + byte1.Length + a2.Length);            a3.CopyTo(totalaa, a1.Length + byte1.Length + a2.Length + byte2.Length);            string total1 = Encoding.UTF8.GetString(totalaa);

            string fileName = Path.GetFileNameWithoutExtension(FileUpload1.PostedFile.FileName); //获取文件名（不包括扩展名）            string Extension1 = Path.GetExtension(FileUpload1.PostedFile.FileName);//扩展名            string Extension2 = Path.GetExtension(FileUpload2.PostedFile.FileName);            if (Extension1 == "" || Extension2 == "")            {                Response.Write("<script>alert(‘请添加文件‘);</script>");                return;            }            if (FileUpload1.PostedFile.FileName == FileUpload2.PostedFile.FileName)            {                Response.Write("<script>alert(‘请添加不同的文件‘);</script>");                return;            }            if (Extension1.ToLower() != ".txt" || Extension2.ToLower() != ".txt")            {                Response.Write("<script>alert(‘文件后缀名不正确！请输入txt的文件‘);</script>");                return;            }            if (Directory.Exists(Server.MapPath("~/UploadFile")) == false)//判断文件夹是否存在,若不存在则创建            {                Directory.CreateDirectory(Server.MapPath("~/UploadFile"));            }            string UploadFilePath = Server.MapPath("UploadFile\\");            string fullName = FileUpload1.PostedFile.FileName;            string newName = DateTime.Now.ToString("yyyyddmmhhss") + fullName.Substring(fullName.LastIndexOf("."));            FileUpload1.SaveAs(UploadFilePath + FileUpload1.PostedFile.FileName);            FileUpload2.SaveAs(UploadFilePath + FileUpload2.PostedFile.FileName);            FileStream fs = new FileStream(UploadFilePath + newName, FileMode.Create);            string line1 = string.Empty;            string line2 = string.Empty;            using (StreamReader sr1 = new StreamReader(UploadFilePath + FileUpload1.PostedFile.FileName))            {                line1 = sr1.ReadToEnd();            }            using (StreamReader sr2 = new StreamReader(UploadFilePath + FileUpload2.PostedFile.FileName))            {                line2 = sr2.ReadToEnd();            }            try            {                string total = "[" + line1 + "," + line2 + "]";                StreamWriter sw = new StreamWriter(fs);                sw.Write(total);                sw.Flush();                sw.Close();                fs.Close();                if (File.Exists(UploadFilePath + FileUpload1.PostedFile.FileName))                {                    File.Delete(UploadFilePath + FileUpload1.PostedFile.FileName);                }                if (File.Exists(UploadFilePath + FileUpload2.PostedFile.FileName))                {                    File.Delete(UploadFilePath + FileUpload2.PostedFile.FileName);                }                showmessage.InnerText = "文件上传成功！";            }            catch            {                showmessage.InnerText = "文件上传失败！";            }