public string QueryPic()
 {
     string json = string.Empty;
     string serverElePath = imgServerPath + elementPath;
     List<TrialPictureQuery> picList = new List<TrialPictureQuery>();
     TrialPictureQuery query = new TrialPictureQuery();
     _ITrialPictureMgr = new TrialPictureMgr(mySqlConnectionString);
     if (!string.IsNullOrEmpty(Request.Params["share_id"]))
     {
         query.share_id = Convert.ToInt32(Request.Params["share_id"]);
     }
     picList = _ITrialPictureMgr.QueryPic(query);
     foreach (var item in picList)
     {
         if (item.image_filename != "")
         {
             //item.image_filename = serverElePath + GetDetailFolder(item.image_filename) + item.image_filename;
             item.image_filename = serverElePath + item.image_filename;
         }
     }
     json = "{success:true,items:" + JsonConvert.SerializeObject(picList) + "}";
     return json;
 }