public string UploadImgPage()

        {

            return "<form action='/User/UploadImg' method='post' enctype='multipart/form-data'><input type='file' name='file'/><input type='submit' value='submit'/></form>";

        }

        /// <summary>

        ///     上传演示

        /// </summary>

        /// <returns></returns>

        public string UploadImg()

        {

            if (Request.File == null) return "no file";

            var fs = new FileStream(Environment.CurrentDirectory + @"\Htmls\" + Request.File.FileName, FileMode.OpenOrCreate);

            fs.Write(Request.File.FileContent, 0, Request.File.FileContent.Length);

            fs.Close();

            return "<img src='/" + Request.File.FileName + @"'>";

        }