Question

我遇到了使用此json字符串获取某些值的问题：

{
 "kind": "shopping#products",
 "etag": "\"YZWJaKE3MHROIW8rCIlu9mAACLM/6qxBB-GwuSPy5L3_zVS6sS2NYFI\"",
 "id": "tag:google.com,2010:shopping/products",
 "selfLink": "https://www.googleapis.com/shopping/search/v1/public/products?country=US&q=Bauerfeind+MalleoTrain+Ankle+Support,+Circumference+in+inches+6+3/4+-+7+1/2+,+Left,+Color+Titanium+&rankBy=price:descending&maxResults=1&startIndex=1",
 "nextLink": "https://www.googleapis.com/shopping/search/v1/public/products?country=US&q=Bauerfeind+MalleoTrain+Ankle+Support,+Circumference+in+inches+6+3/4+-+7+1/2+,+Left,+Color+Titanium+&rankBy=price:descending&maxResults=1&startIndex=2",
 "totalItems": 46,
 "startIndex": 1,
 "itemsPerPage": 1,
 "currentItemCount": 1,
 "items": [
  {
   "kind": "shopping#product",
   "id": "tag:google.com,2010:shopping/products/5944931/17136892246969389705",
   "selfLink": "https://www.googleapis.com/shopping/search/v1/public/products/5944931/gid/17136892246969389705",
   "product": {
        "googleId": "17136892246969389705",
        "author": {"name": "Superemployee.com","accountId": "5944931"},
        "creationTime": "2011-08-28T07:46:29.000Z",
        "modificationTime": "2011-09-11T06:02:54.000Z",
        "country": "US",
        "language": "en",
        "title": "Bauerfeind MalleoTrain Ankle Support Circumference in inches 6 3/4 - 7 1/2 Left Color Black",
        "description": "Bauerfeind MalleoTrain Ankle Support Circumference in inches 6 3/4 - 7 1/2 Left Color Black : Bauerfeind MalleoTrain Ankle Support, Circumference in inches 6 3/4 - 7 1/2 , Left, Color Black MalleoTrain relieves ankle pain and swelling during sports and everyday activities. Product Features: Knitted ankle support incorporating an anatomically contoured silicone insert behind each ankle bone . Silicone inserts leave ankle bones pressure-free and provide intermittent compression to the soft tissue of the joint, leading to increased circulation, thus aiding in the reduction of swelling and edema . Promotes proprioception , thus heightening sensory awareness in the ankle for increased joint stabilization . Anatomical knit carries controlled compression graduated at the edges to prevent constriction of circulation . Lightweight, breathable knit will not retain heat and is completely machine washable . Can be used to treat: Ankle swelling and soreness . Ankle sprains . Ligamental weakness and slight ligamentous tears . Degenerative joint disease (osteoarthritis) . Synovitis . ? Bursitis . Arthritis, osteoarthritis . Post cast . Product photo may not exactly match the product offered for sale. Please refer to the product description.",
        "link": "http://superemployee-com.amazonwebstore.com/Bauerfeind-MalleoTrain-Ankle-Support-Circumference-in/M/B001D0PFRY.htm?traffic_src=froogle&utm_medium=CSE&utm_source=froogle",
        "brand": "Bauerfeind",
        "condition": "new",
        "inventories": [{"channel": "online", "availability": "inStock","price": 90.0,"currency": "USD"} ],
        "images": [{"link": "http://ecx.images-amazon.com/images/I/31xD5bPI4sL.jpg?gdapi"}
    ]
   }
  }
 ]

我尝试过使用和创建类但是无法从前两个级别获取数据，例如我正在尝试检索价格但无法弄清楚如何提取这些数据？

这是我正在使用的代码，它什么都不返回：

<DataContract(Namespace:="")> _
    Public Class items

        <DataMember(Name:="product")>
        Public Property product As product

    End Class

    <DataContract(Name:="product", Namespace:="")> _
    Public Class product
        <DataMember(Name:="inventories")>
        Public Property inventories As inventories

    End Class

    <DataContract(Name:="inventories", Namespace:="")> _
    Public Class inventories
        <DataMember(Name:="price")>
        Public Property price As Double

    End Class

感谢您的帮助

使用JSON.net框架我将我的类更改为以下内容但仍然没有得到任何回报的价格？

   Public Class items
        Public Property product As product()
        Public Property kind As String
    End Class

    Public Class product
        Public Property inventories As inventories()
    End Class

    Public Class inventories
        Public Property price As Double
    End Class

Answer 1

你看过JSON.net了吗？

这是一个非常快速的序列化/反序列化框架。一旦放入项目，您就可以：

Dim myObj as <Enter object type> _
= JsonConvert.DeserializeObject(Of <Enter object type>)("my json string here")

主页是：http://james.newtonking.com/pages/json-net.aspx

NB：我的示例可能略有偏差，未检查其语法：）

Answer 2

我推荐JSON.net，正如SBlackler所做的那样。我根据您的对象和您发布的JSON对象在C＃中编写了一个测试，并且能够构建一切正常。这是我的代码。

        List<items> Results = new List<items>();
        foreach (JToken Item in (JArray)JObject.Parse(json)["items"])
        {
            Results.Add(new items()
            {
                kind = Item["kind"].ToString(),
                product = new product()
                {
                    inventories = new inventories()
                    {
                        price = Convert.ToDouble(Item["product"]["inventories"][0]["price"].ToString())
                    }
                }
            });
        }
        Response.Write(Results[0].product.inventories.price);

我对json对象的结构有点不确定，但库存似乎是一个数组。在您发布的示例中，您似乎试图获取该数组中第一个对象的“价格”值，而我的代码就是这样做的。如果inventoryories数组中有多个对象，您可能需要调整对象以及相应填充它们的代码。

以下是我的目标：

class items
{
    public product product { get; set; }
    public string kind { get; set; }
}

class product
{
    public inventories inventories { get; set; }
}

class inventories
{
    public double price { get; set; }
}

上面的代码假设库存数组中总是至少有一个对象，并且只会从第一个对象拉出来。以下是如果库存数组中有多个对象，您可能希望重构代码。

    List<item> Results = new List<item>();
    foreach (JToken Item in (JArray)JObject.Parse(json)["items"])
    {
        item CurrentItem = new item()
        {
            kind = Item["kind"].ToString(),
            product = new product()
        };
        foreach (JToken inventory in (JArray)Item["product"]["inventories"])
        {
            CurrentItem.product.inventories.Add(new inventory()
            {
                price = Convert.ToDouble(inventory["price"].ToString())
            });
        }
        Results.Add(CurrentItem);
    }
    Response.Write(Results[0].product.inventories[0].price);

修改后的对象

class item
{
    public product product { get; set; }
    public string kind { get; set; }
}

class product
{
    public List<inventory> inventories { get; set; }

    public product()
    {
        inventories = new List<inventory>();
    }
}

class inventory
{
    public double price { get; set; }
}

我希望这能解决你所寻找的问题。祝你好运！

将JSON反序列化为对象（VB.NET）

2 个答案: