0

我在这个 json 上有点挣扎，我的第一个错误是：

 $exception {"Error converting value 167 to type 'Web.Domain.Ean.HotelList'. Path '', line 1, position 3."} System.Exception {Newtonsoft.Json.JsonSerializationException}

所以我一直在尝试不同的方法来让它工作，现在我认为我已经把我的代码弄得一团糟，现在我得到了这个错误。

Cannot implicitly convert type 'string' to 'System.Collections.Generic.IEnumerable<Web.Domain.Ean.HotelCount>'

任何有一双新眼睛的人都可以看看，看看他们是否可以帮助解决错误，如果可能的话，还可以解释一些 json 理论来帮助我学习。

public class HotelCount
{
    public string ActivePropertyCount { get; set; }
}

public IEnumerable<HotelCount> GetNumberOfHotels()
{
    var numberOfHotelCount = GetHotelsFromEan.GetListOfHotels();
    var root = JObject.Parse(numberOfHotelCount.ToString());
    IList<JToken> hotelCount = root["HotelListResponse"]["HotelList"].Children().ToList();

    IList<HotelCount> count = new List<HotelCount>();
    foreach (JToken hotel in hotelCount)
    {
        HotelCount countHotels = JsonConvert.DeserializeObject<HotelCount>(hotel.ToString());
        count.Add(countHotels);
    }

    var t = count.FirstOrDefault();
    //IList<HotelCount> numberOfHotels = hotelCount.Select(count => JsonConvert
    //                             .DeserializeObject<HotelCount>(
    //                             count.SingleOrDefault().ToString())).ToList();
    return t.ActivePropertyCount;
}

谢谢乔治

==========================更新代码======================= ========

public string GetNumberOfHotels()
        {
            var numberOfHotelCount = GetHotelsFromEan.GetListOfHotels();
            var root = JObject.Parse(numberOfHotelCount.ToString());

            IList<JToken> hotelCount = root["HotelListResponse"]["HotelList"].Children().ToList();

            IList<HotelCount> count = hotelCount.Select(hotel => JsonConvert.DeserializeObject<HotelCount>(hotel.ToString())).ToList();


            return count.ToString();
        }

===============================新更新================== ===============

json 值的格式为 {"@activePropertyCount":"167","

所以我的课是：

public class HotelCount
    {
        public string ActivePropertyCount { get; set; }
    }

我的最后一个错误是。

Message=将值 167 转换为类型“Web.Domain.Ean.HotelCount”时出错 Message=无法从 System.Int64 转换或转换为 Web.Domain.Ean.HotelCount。

所以如果我回到下面的代码，需要做些什么来返回 ActivePropertyCount 的值

public IEnumerable<HotelCount> GetNumberOfHotels()
        {
            var numberOfHotelCount = GetHotelsFromEan.GetListOfHotels();
            var root = JObject.Parse(numberOfHotelCount.ToString());

            IList<JToken> hotelCount = root["HotelListResponse"]["HotelList"].Children().ToList();

            IList<HotelCount> count = new List<HotelCount>();
            foreach (JToken hotel in hotelCount)
            {
                HotelCount countHotels = JsonConvert.DeserializeObject<HotelCount>(hotel.FirstOrDefault().ToString());
                count.Add(countHotels);
            }

            return count;

        }

======================修复了=========================

public string GetNumberOfHotels()
        {
            var numberOfHotelCount = GetHotelsFromEan.GetListOfHotels();
            var root = JObject.Parse(numberOfHotelCount.ToString());

            IList<JToken> hotelCount = root["HotelListResponse"]["HotelList"].Children().Values().ToList();

            var s = hotelCount.FirstOrDefault();
            var t = s;

           // IList<HotelCount> count = hotelCount.Select(hotel => JsonConvert.DeserializeObject<HotelCount>(hotel.FirstOrDefault().ToString()).ActivePropertyCount).ToList();

            return t.ToString();

        }
4

1 回答 1

0

真的不确定你有什么，但试试这个（猜测 jToken 属性是ActivePropertyCount但根据需要替换）：

public string GetNumberOfHotels()
{      
    var numberOfHotelCount = GetHotelsFromEan.GetListOfHotels();
    var root = JObject.Parse(numberOfHotelCount.ToString());

    // Get list of hotels
    IList<JToken> hotels = root["HotelListResponse"]["HotelList"].Children().ToList()
        .Select(hotel => JsonConvert.DeserializeObject<HotelCount>(hotel.ToString())).ToList();

    // Now get ActivePropertyCount for each hotel
    int totalCount = 0;
    foreach (JToken jToken in hotels)
    {
        totalCount += jToken.Value<int>("ActivePropertyCount");
    }
    return totalCount.ToString();
}
于 2013-04-16T12:14:13.537 回答