/// <summary>
 /// 返回发送信息给当前用户的发送者列表及未阅读信息数
 /// </summary>
 /// <param name="receiver"></param>
 /// <returns></returns>
 public List <MIS_WebIM_SenderModel> GetSenderByReceiver(string receiver)
 {
     using (DBContainer db = new DBContainer())
     {
         ObjectResult <P_MIS_GetSenderByReceiver_Result> result = db.P_MIS_GetSenderByReceiver(receiver);
         var modelList = from r in result
                         select new MIS_WebIM_SenderModel {
             Sender       = r.Sender,
             SenderTitle  = r.SenderTitle,
             MessageCount = r.MessageCount
         };
         return(modelList.ToList());
     }
 }