【发布时间】：2016-10-15 23:45:56
【问题描述】：
早上好，
我正在使用 Newtonsoft.JSON 反序列化来自 Import Io 的 JSON 响应。我已经成功地使用http://json2csharp.com/ 在一个实例中成功地构建了一个数据模型以获取对数据的访问权限，但是在那个实例中只返回了一个 JSON 对象。我现在正在处理一个新的 JSON 片段，它与多个对象一起返回，我遇到了以下错误消息的问题：
Newtonsoft.Json.JsonSerializationException：无法将当前 JSON 对象（例如 {"name":"value"}）反序列化为类型“System.Collections.Generic.List`1[OSP.Shop_DTO+RootObject]”，因为类型需要一个 JSON 数组（例如 [1,2,3]）才能正确反序列化。 要修复此错误，请将 JSON 更改为 JSON 数组（例如 [1,2,3]）或更改反序列化类型，使其成为普通的 .NET 类型（例如，不是像整数这样的原始类型，而不是像可以从 JSON 对象反序列化的数组或列表。 JsonObjectAttribute 也可以添加到类型中以强制它从 JSON 对象反序列化。 路径 'url'，第 1 行，位置 7。”
我的 JSON 如下所示：
{
"url": "http://www.myurl.com/-shop-item.html",
"result": {
"extractorData": {
"url": "http://www.myurl.com/-shop-item.html",
"resourceId": "1db49f66afc2f234cb5ab470f0c39e0c",
"data": [
{
"group": [
{
"BN_shop_1KG": [
{
"text": "$36.00"
}
],
"BN_shop_2KG": [
{
"text": "$69"
}
],
"BN_shop_3KG": [
{
"text": "$97"
}
],
"BN_VEGE_5KG": [
{
"text": "3 KG = $97"
}
],
"BN_shop_4KG": [
{
"text": "$124"
}
],
"BN_shop_5KG": [
{
"text": "$149"
}
]
}
]
}
]
},
"pageData": {
"resourceId": "1db49f66afc2f234cb5ab470f0c39e0c",
"statusCode": 200,
"timestamp": 1476432605275
},
"timestamp": 1476432606594,
"sequenceNumber": 0
}
}{
"url": "http://www.myurl.com/-shop-concentrate.html",
"result": {
"extractorData": {
"url": "http://www.myurl.com/-shop-concentrate.html",
"resourceId": "dd4837cc7d0085eae005243c7bd8ca8a",
"data": [
{
"group": [
{
"BN_shop_1KG": [
{
"text": "$27.00"
}
],
"BN_shop_2KG": [
{
"text": "$49"
}
],
"BN_shop_3KG": [
{
"text": "$69"
}
],
"BN_VEGE_5KG": [
{
"text": "3 KG = $69"
}
],
"BN_shop_4KG": [
{
"text": "$84"
}
],
"BN_shop_5KG": [
{
"text": "$99"
}
]
}
]
}
]
},
"pageData": {
"resourceId": "dd4837cc7d0085eae005243c7bd8ca8a",
"statusCode": 200,
"timestamp": 1476432604237
},
"timestamp": 1476432605124,
"sequenceNumber": 1
}
}{
"url": "http://www.myurl.comshop-matrix.html",
"result": {
"extractorData": {
"url": "http://www.myurl.comshop-matrix.html",
"resourceId": "deee30ffa0098e017a06c0e0c805e133",
"data": [
{
"group": [
{
"BN_shop_1KG": [
{
"text": "$29.00"
}
],
"BN_shop_2KG": [
{
"text": "$56"
}
],
"BN_shop_3KG": [
{
"text": "$79"
}
],
"BN_VEGE_5KG": [
{
"text": "3 KG = $79"
}
],
"BN_shop_4KG": [
{
"text": "$99"
}
],
"BN_shop_5KG": [
{
"text": "$119"
}
]
}
]
}
]
},
"pageData": {
"resourceId": "deee30ffa0098e017a06c0e0c805e133",
"statusCode": 200,
"timestamp": 1476432602408
},
"timestamp": 1476432603204,
"sequenceNumber": 2
}
}{
"url": "http://www.myurl.comsoy-shop-item.html",
"result": {
"extractorData": {
"url": "http://www.myurl.comsoy-shop-item.html",
"resourceId": "5593aad40f95ba868626e47a1b550813",
"data": [
{
"group": [
{
"BN_shop_1KG": [
{
"text": "$25.00"
}
],
"BN_shop_2KG": [
{
"text": "$45"
}
],
"BN_shop_3KG": [
{
"text": "$89"
}
],
"BN_VEGE_5KG": [
{
"text": "5 KG = $89"
}
],
"BN_shop_4KG": [
{
"text": "$175"
}
],
"BN_shop_5KG": [
{
"text": "$339"
}
]
}
]
}
]
},
"pageData": {
"resourceId": "5593aad40f95ba868626e47a1b550813",
"statusCode": 200,
"timestamp": 1476432602479
},
"timestamp": 1476432603847,
"sequenceNumber": 3
}
}{
"url": "http://www.myurl.compea-shop.html",
"result": {
"extractorData": {
"url": "http://www.myurl.compea-shop.html",
"resourceId": "f91e05d0265ab5a5f7f948c57a05bced",
"data": [
{
"group": [
{
"BN_shop_1KG": [
{
"text": "$25.00"
}
],
"BN_shop_2KG": [
{
"text": "$45"
}
],
"BN_shop_3KG": [
{
"text": "$89"
}
],
"BN_VEGE_5KG": [
{
"text": "5 KG = $89"
}
],
"BN_shop_4KG": [
{
"text": "$169"
}
],
"BN_shop_5KG": [
{
"text": "$319"
}
]
}
]
}
]
},
"pageData": {
"resourceId": "f91e05d0265ab5a5f7f948c57a05bced",
"statusCode": 200,
"timestamp": 1476432605227
},
"timestamp": 1476432606451,
"sequenceNumber": 4
}
}
模型如下所示：
public class BNShop1KG
{
public string text { get; set; }
}
public class BNShop2KG
{
public string text { get; set; }
}
public class BNShop3KG
{
public string text { get; set; }
}
public class BNVEGE5KG
{
public string text { get; set; }
}
public class BNShop4KG
{
public string text { get; set; }
}
public class BNShop5KG
{
public string text { get; set; }
}
public class Group
{
public List<BNShop1KG> BN_shop_1KG { get; set; }
public List<BNShop2KG> BN_shop_2KG { get; set; }
public List<BNShop3KG> BN_shop_3KG { get; set; }
public List<BNVEGE5KG> BN_VEGE_5KG { get; set; }
public List<BNShop4KG> BN_shop_4KG { get; set; }
public List<BNShop5KG> BN_shop_5KG { get; set; }
}
public class Datum
{
public List<Group> group { get; set; }
}
public class ExtractorData
{
public string url { get; set; }
public string resourceId { get; set; }
public List<Datum> data { get; set; }
}
public class PageData
{
public string resourceId { get; set; }
public int statusCode { get; set; }
public long timestamp { get; set; }
}
public class Result
{
public ExtractorData extractorData { get; set; }
public PageData pageData { get; set; }
public long timestamp { get; set; }
public int sequenceNumber { get; set; }
}
public class RootObject
{
public string url { get; set; }
public Result result { get; set; }
}
在我的代码中，我试图从第一个 JSON 对象访问“BN_shop_1KG”中的“文本”值。这个项目：
"BN_shop_1KG": [
{
"text": "$36.00"
}
我在我的代码中尝试了以下操作，但收到了上述错误。据我了解阅读以前的一些线程，我需要使用反序列化到 List 来处理以这种方式接收的 JSON：
List<Shop_DTO.RootObject> obj = JsonConvert.DeserializeObject<List<Shop_DTO.RootObject>>(_rawHtmlResult);
var price = obj.First().result.extractorData.data[0].group[0].BN_shop_1kg[0].text;
Debug.WriteLine("Price for item {0}", price);
任何帮助将不胜感激，我已经坚持了几天:(
【问题讨论】：
标签： c# json xamarin.forms json-deserialization