public object GetStrongestRssiTag() { string Mes = ""; int TagID = 0; string TagMAC = ""; int Error = 0;// 标签可用 = 0 ; 标签已经被绑定 =1 ; LocatingService不可用时 = 2 ; 没有扫描到可用的标签 = 3 if (LocatingServiceUtil.IsAvailable()) { IServiceApi serviceApi = LocatingServiceUtil.Instance <IServiceApi>(); string mac = serviceApi.GetTagOnReception(); if (mac == null) { mac = ""; } AppDataContext db = new AppDataContext(); IQueryable <Tag> tags = db.Tags.Where(_d => _d.TagMac.ToLower().Trim() == mac.ToLower().Trim()); if (tags.Count() == 1) { Tag tag = tags.First(); IQueryable <HostTag> hostTags = db.HostTags.Where(_d => _d.TagId == tag.Id); if (hostTags.Count() > 0) { Mes = string.Format("×当前信号最强的标签MAC地址是{0},但已经被绑定,标签不可用。", tag.TagMac); Error = 1; } else { Mes = string.Format("√当前信号最强的标签MAC地址是{0},标签可用。", tag.TagMac); TagID = tag.Id; TagMAC = tag.TagMac; Error = 0; } } else { Mes = "暂时没有扫描到可用的标签!"; Error = 3; } } else { Mes = "LocatingService不可用"; Error = 2; } return(new { Mes, TagID, TagMAC, Error }); }