类名不同，结构相同的两个类相互转换

        /// <summary>
        /// 结构相同，类名不同的实体类转换（忽略 null 
        /// kk 2015-06-03 
        /// </summary>
        /// <typeparam name="T">需转换的类 类型</typeparam>
        /// <typeparam name="V">目标类 类型</typeparam>
        /// <param name="a">需转换的类 对象</param>
        /// <returns></returns>
        private V ConvertClassBySameClassStructure<T, V>(T a)
            where T : class ,new()
            where V : class,new()
        {
            Newtonsoft.Json.JsonSerializerSettings jSetting = new Newtonsoft.Json.JsonSerializerSettings();
            jSetting.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;
            string json = Newtonsoft.Json.JsonConvert.SerializeObject(a, jSetting);
            return SerializeUtil.DeserializeJson<V>(json);
        }