/// <summary>
        /// 将EditModel转换为广告位实体
        /// </summary>
        /// <returns></returns>
        public AdvertisingPosition AsAdvertisingPosition()
        {
            AdvertisingService  advertisingService = new AdvertisingService();
            AdvertisingPosition position           = advertisingService.GetPosition(PositionId);

            if (position == null)
            {
                position            = AdvertisingPosition.New();
                position.PositionId = PositionId;
            }
            position.Description    = Description ?? string.Empty;
            position.FeaturedImage  = FeaturedImage ?? string.Empty;
            position.PresentAreaKey = PresentAreaKey;
            position.Height         = Height;
            position.Width          = Width;
            position.IsEnable       = IsEnable;
            return(position);
        }