Json 序列化为空
Json Serializing to Null
我对 Json 的需求不大，所以它仍然让我感到沮丧。如果这是一个骗局，我深表歉意，但我在搜索中发现的所有内容都与不同的问题有关。
我正在尝试使用沃尔玛 API，我的数据很好（我在下面附上了一条记录以供参考）。我能找到的所有现有问题似乎都与传入的空数据有关。这是关于空数据的输出。
Problem/Question: 我对 API 的调用产生了巨大的 return - 在 1,000 条记录中（385MB 未压缩).当我反序列化时，我没有异常，我仍然得到 1000 条记录，但是 returned 列表中的每个 属性 都是 null 或 0。所以，Json returns a泛型列表和列表有记录且记录不为空，但每个记录中的所有 values/properties 均为空（如果为数字，则为 0）。
我在序列化过程中设置了一个断点，我可以看到 json 数据正确进入。它刚刚出现 null/0.
如果您有任何想法 - 非常感谢您提供的任何帮助。感谢您花时间阅读本文，并提前感谢您提供的任何帮助。
不想要的结果：
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 Class:
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; }
}
}
第 1 步：
将您的 JSON 放入此站点，以构建您的 C# POCO 模型 (http://json2csharp.com/)
第 2 步：
从 Newtonsoft 获取 Json.Net。
第 3 步：
RootObject myObject = JsonConvert.DeserializeObject<RootObject>(jsonString);
简单地返回另一条路：
string jsonString = JsonConvert.SerializeObject<RootObject>(myObject);
第 4 步：
阅读所有关于 Json.Net 的内容，因为在 .Net 中处理 JSON 比其他任何东西都优越。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 = 做同样事情的代码少了很多。
最后一件事。不需要任何属性，只需要有一个空的构造函数，或者没有构造函数。
您应该将 [DataMember] 属性添加到项目 class 的属性中。
现在只有 Items 列表是 "detected"，并且 Item 对象使用默认值序列化
我对 Json 的需求不大，所以它仍然让我感到沮丧。如果这是一个骗局，我深表歉意，但我在搜索中发现的所有内容都与不同的问题有关。
我正在尝试使用沃尔玛 API，我的数据很好（我在下面附上了一条记录以供参考）。我能找到的所有现有问题似乎都与传入的空数据有关。这是关于空数据的输出。
Problem/Question: 我对 API 的调用产生了巨大的 return - 在 1,000 条记录中（385MB 未压缩).当我反序列化时，我没有异常，我仍然得到 1000 条记录，但是 returned 列表中的每个 属性 都是 null 或 0。所以，Json returns a泛型列表和列表有记录且记录不为空，但每个记录中的所有 values/properties 均为空（如果为数字，则为 0）。
我在序列化过程中设置了一个断点，我可以看到 json 数据正确进入。它刚刚出现 null/0.
如果您有任何想法 - 非常感谢您提供的任何帮助。感谢您花时间阅读本文，并提前感谢您提供的任何帮助。
不想要的结果：
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 Class:
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; }
}
}
第 1 步：
将您的 JSON 放入此站点，以构建您的 C# POCO 模型 (http://json2csharp.com/)
第 2 步：
从 Newtonsoft 获取 Json.Net。
第 3 步：
RootObject myObject = JsonConvert.DeserializeObject<RootObject>(jsonString);
简单地返回另一条路：
string jsonString = JsonConvert.SerializeObject<RootObject>(myObject);
第 4 步：
阅读所有关于 Json.Net 的内容，因为在 .Net 中处理 JSON 比其他任何东西都优越。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 = 做同样事情的代码少了很多。
最后一件事。不需要任何属性，只需要有一个空的构造函数，或者没有构造函数。
您应该将 [DataMember] 属性添加到项目 class 的属性中。
现在只有 Items 列表是 "detected"，并且 Item 对象使用默认值序列化