自动上传编辑器中的远程图片与自动替换alt标签

#region  增加一条数据
      /// <summary>
      ///  增加一条数据
      /// </summary>
      public int Add( NewsEntity model )
      {
            //未添加图片说明的添加说明
          MatchCollection matchs = Regex.Matches(model.Content, "<img.*/?>(<img/>)?", RegexOptions.IgnoreCase);
          Match filePath;
          foreach (Match match in matchs)
          {
              model.Content = model.Content.Replace(match.Value, match.Value.Replace("alt=\"\"", "alt=\"" + model.Title + "\""));

              //将远程包含http和不是chinayq.com服务器中的图片上传
              filePath = Regex.Match(match.Value, @"(http)+.*(jpg|png|gif|jpeg)", RegexOptions.IgnoreCase);
              if (filePath.Success && filePath.Value.IndexOf("chinayq.com") < 0)
              {
                  model.Content = model.Content.Replace(filePath.Value, WebUtility.PicOperate.UploadHttpFile(filePath.Value.Replace("\"", "")));

              }

          }
          return dal.Add(model);
      }
      #endregion

/// <summary>
      /// 上传远程文件到本地服务器
      /// </summary>
      /// <param name="filePath">远程文件</param>
      /// <returns></returns>
      public static string UploadHttpFile(string urlPath)
      {  
          string filePath =string.Format("/upload/contentimg/{0}/",System.DateTime.Now.ToString("yyyyMMdd"));
          string fileName=GenerateFileName()+Path.GetExtension(urlPath);
          WebRequest request = WebRequest.Create(urlPath);

         //使用默认验证
          request.Credentials = CredentialCache.DefaultCredentials;
          if (!Directory.Exists(serverPath + filePath)) { Directory.CreateDirectory(serverPath + filePath); }
          string folderName =filePath + fileName;
          System.Drawing.Image image = System.Drawing.Image.FromStream(request.GetResponse().GetResponseStream());
          image.Save(serverPath+folderName);
          image.Dispose();
          return folderName;
      }

注意：使用WebRequest 需要引用system.net空间

  model.Content:FCK编辑器中的内容