static string ClassToJason(ChinaOpalSearch.SnappsEntity entity) { DataContractSerializer serializer = new DataContractSerializer(typeof(ChinaOpalSearch.SnappsEntity)); System.IO.MemoryStream ms = new MemoryStream(); serializer.WriteObject(ms, entity); System.IO.StreamReader reader = new StreamReader(ms); ms.Position = 0; string strRes = reader.ReadToEnd(); reader.Close(); ms.Close(); return(strRes); }