/// <summary>
 /// 更新一条数据
 /// </summary>
 public bool Update(XHD.Model.crm_exchange model)
 {
     return(dal.Update(model));
 }
 /// <summary>
 /// 增加一条数据
 /// </summary>
 public bool Add(XHD.Model.crm_exchange model)
 {
     return(dal.Add(model));
 }