public static void GetCategorys(string token, int?parentCid, ResponseHandle handle) { ApiCaller.RequestParams rp = new ApiCaller.RequestParams(); rp.data = new Dictionary <string, string>(); rp.data.Add(Param.TOKEN, token); if (parentCid != null) { rp.data.Add(Param.PARENT_CID, "" + (int)parentCid); } rp.callback = handle; apiCaller.GetCategorys(rp); }