public string GetLocations() { var list = _manager.GetGpsItems(); Guid id = Guid.Parse("80dd122e-1418-4965-8f14-245005804d0a"); //SetPosition(id); string url = "http://www.gps902.net/api/GetMonitor.aspx?ids=356803210132270,353507000002012,353507100003389&mapType=baidu&key=20161222HLXTJDMW730XY"; string json = Common.HttpHelper.Get(url); return(Common.Utils.SerializeObject(list)); }