Json序列化为空

Question

我对Json的需求不是很大，所以对我来说仍然处于那种令人头疼的挫败感。 对于这是骗子，我深表歉意，但我在搜索中发现的所有内容都与其他问题有关。

我正在尝试使用Walmart API，并且我的数据很好（我在下面附加了一条记录供参考）。 我能找到的所有现有问题似乎都与传入的空数据有关。这是关于空数据流出的问题。

问题/疑问：我对API的调用产生了巨大的回报-记录数为1000（未压缩为385MB）。 当我反序列化时，我也没有异常，仍然得到1000条记录，但是返回列表中的每个属性为null或0。因此，Json返回了一个泛型列表，该列表具有记录，并且记录也不为null，但是所有每个记录内的值/属性的值均为null（如果为数字，则为0）。

我在序列化过程中设置了一个断点，并且可以看到json数据正确输入。 它只是以null / 0的形式出现。

如果您有任何想法-非常感谢您可以提供的任何帮助。 感谢您抽出宝贵的时间阅读本文，并感谢您提供的任何帮助。

不良结果：

Item_ID itemId  parentItemId    name    salePrice   upc shortDescription    longDescription brandName   thumbnailImage  mediumImage largeImage  productTrackingUrl  ninetySevenCentShipping standardShipRate    size    color   marketplace shipToStore freeShipToStore productUrl  customerRating  numReviews  customerRatingImage rollBack    bundle  clearance   stock   gender  age freeShippingOver50Dollars   availableOnline
 1  0   0   NULL    0   NULL    NULL    NULL    NULL    NULL    NULL    NULL    NULL    0   0   NULL    NULL    0   0   0   NULL    NULL    0   NULL    0   0   0   NULL    NULL    NULL    0   0

序列化逻辑：

public API_Json_Special_Feeds.RootObject testExistingJson()
    {
        string json = "";
        //I saved a response to a text file so I don't overload the API with testing. The same problem happens whether or not I load from API or text file.
        using(TextReader tr = new StreamReader(@"C:jsonsingle.txt"))
        {
            json = tr.ReadToEnd();//string
        }
        var serializer = new DataContractJsonSerializer(typeof(API_Json_Special_Feeds.RootObject));

        var ms = new MemoryStream(Encoding.UTF8.GetBytes(json));
        var data = (API_Json_Special_Feeds.RootObject)serializer.ReadObject(ms);
         return data;
    }

样本Json记录：

 {"items":[ {
 "itemId" : 12321374,
 "parentItemId" : 12321374,
 "name" : "Castle Tent Loft Bed w/ Slide ; Under Bed Storage, Blue",
 "salePrice" : 369.0,
 "upc" : "081438383996",
 "shortDescription" : "Finished in White powder coat with Blue and Red Microfiber fabric tent",
 "longDescription" : "Fun Castle Tent Bunk Bed with Slide includes a tent over twin bed and a covered hiding place below. The covered hiding place below can also be used as under bed storage. The top of the slide is tented with a tower with peek through, fold down window covers. <ul class="noindent"><li>Finished in White powder coat with Blue and Red Microfiber fabric tent, 100% polyester.</li><li>Uses a standard twin size mattress (sold separately).</li><li>Only use a twin size mattress that is 74-75" long and 37.5-38.5" wide.</li><li>Bunk bed is tested and certified by an independent testing laboratory to meet all minimum requirements of ASTM F1427-07 and U.S. CFR 1213 and 1513.</li><li>Some assembly required. 79-3/4" x 101-1/4" x 92" tall.</li></ul>",
 "brandName" : "Castle",
 "thumbnailImage" : "https://i5.walmartimages.com/asr/a1bac83b-68f2-427e-82ac-97ce1e11b0c6_1.f18ff9fc14c7aca2d9c92c81f4b5c8ba.jpeg?odnHeight=100&odnWidth=100&odnBg=ffffff",
 "mediumImage" : "https://i5.walmartimages.com/asr/a1bac83b-68f2-427e-82ac-97ce1e11b0c6_1.f18ff9fc14c7aca2d9c92c81f4b5c8ba.jpeg?odnHeight=180&odnWidth=180&odnBg=ffffff",
 "largeImage" : "https://i5.walmartimages.com/asr/a1bac83b-68f2-427e-82ac-97ce1e11b0c6_1.f18ff9fc14c7aca2d9c92c81f4b5c8ba.jpeg?odnHeight=450&odnWidth=450&odnBg=ffffff",
 "productTrackingUrl" : "http://linksynergy.walmart.com/fs-bin/click?id=|LSNID|&offerid=223073.7200&type=14&catid=8&subid=0&hid=7200&tmpid=1082&RD_PARM1=http%253A%252F%252Fwww.walmart.com%252Fip%252FCastle-Tent-Loft-Bed-w-Slide--Under-Bed-Storage-Blue%252F12321374%253Faffp1%253D%257Capk%257C%2526affilsrc%253Dapi",
 "ninetySevenCentShipping" : false,
 "standardShipRate" : 0.0,
 "size" : "Twin",
 "color" : "Blue",
 "marketplace" : false,
 "shipToStore" : true,
 "freeShipToStore" : true,
 "productUrl" : "http://c.affil.walmart.com/t/api00rb?l=http%3A%2F%2Fwww.walmart.com%2Fip%2FCastle-Tent-Loft-Bed-w-Slide--Under-Bed-Storage-Blue%2F12321374%3Faffp1%3D%7Capk%7C%26affilsrc%3Dapi%26veh%3Daff%26wmlspartner%3Dreadonlyapi",
 "customerRating" : "4.574",
 "numReviews" : 54,
 "customerRatingImage" : "http://i2.walmartimages.com/i/CustRating/4_6.gif",
 "rollBack" : true,
 "bundle" : true,
 "clearance" : false,
 "stock" : "Available",
 "gender" : "Boys",
 "age" : "Child",
 "freeShippingOver50Dollars" : true,
 "availableOnline" : true
}]
}

Json类别：

public class API_Json_Special_Feeds
{
    [DataContract]
    public class Item
    {
        public int itemId { get; set; }
        public int parentItemId { get; set; }
        public string name { get; set; }
        public double salePrice { get; set; }
        public string upc { get; set; }
        public string shortDescription { get; set; }
        public string longDescription { get; set; }
        public string brandName { get; set; }
        public string thumbnailImage { get; set; }
        public string mediumImage { get; set; }
        public string largeImage { get; set; }
        public string productTrackingUrl { get; set; }
        public bool ninetySevenCentShipping { get; set; }
        public double standardShipRate { get; set; }
        public string size { get; set; }
        public string color { get; set; }
        public bool marketplace { get; set; }
        public bool shipToStore { get; set; }
        public bool freeShipToStore { get; set; }
        public string productUrl { get; set; }
        public string customerRating { get; set; }
        public int numReviews { get; set; }
        public string customerRatingImage { get; set; }
        public bool rollBack { get; set; }
        public bool bundle { get; set; }
        public bool clearance { get; set; }
        public string stock { get; set; }
        public string gender { get; set; }
        public string age { get; set; }
        public bool freeShippingOver50Dollars { get; set; }
        public bool availableOnline { get; set; }
    }
    [DataContract]
    public class RootObject
    {
        [DataMember]
        public List<Item> items { get; set; }
    }
}

Answer 1

您应该将[DataMember]属性添加到Item类的属性中。 现在，只有“项目”列表被“检测到”，并且项目对象被序列化为默认值

Answer 2

第1步：

在此站点中放入JSON，以构建C＃POCO模型（ http://json2csharp.com/ ）

第2步：

从Newtonsoft获取Json.Net。

第三步：

RootObject myObject = JsonConvert.DeserializeObject<RootObject>(jsonString);

要简单地返回另一种方式：

string jsonString = JsonConvert.SerializeObject<RootObject>(myObject);

第四步：

阅读有关Json.Net的所有内容，因为它在处理.Net中的JSON方面比其他任何东西都要优越。 另外，如果您喜欢冒险，请阅读动态类型（如果您还没有的话）。 Json.Net和C＃中的动态类型=更少的代码可以完成相同的操作。

最后一件事。 不需要任何属性，只需要一个空的构造函数，或者就不需要构造函数。