public TableData dataToJson()
    {
        var       blist = BloodOxygenBLL.GetAllList();
        TableData td    = new TableData();

        td.count = blist.Count;
        td.data  = JsonConvert.SerializeObject(blist);
        return(td);
    }
    public string dataToJson(string username)
    {
        List <BloodOxygen> blist = BloodOxygenBLL.GetDatasByName(username);
        DATA  data1 = new DATA();
        DATA  data2 = new DATA();
        DATAT datat = new DATAT();

        datat.yang = data1;
        datat.xue  = data2;

        blist.ForEach((a) =>
        {
            data1.srange.Add((int)a.T3001005_srange);
            data1.lrange.Add((int)a.T3001005_lrange);
            data1.bloodoxygenvalue.Add((int)a.T3001005_value);
            data2.srange.Add((int)a.T3001009_srange);
            data2.lrange.Add((int)a.T3001009_lrange);
            data2.bloodoxygenvalue.Add((int)a.T3001009_value);
        });

        return(JsonConvert.SerializeObject(datat));
    }