将JSON反序列化为对象(VB.NET)

I'm having an issue with getting some of the values from with this json string:

我有一个问题，从这个json字符串中获取一些值:

{
 "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"}
    ]
   }
  }
 ]

I have tried using and creating classes but can't get data to return apart from at the top two levels, for example I'm trying to retrieve the price but can't figure out how to extract this data?

我尝试过使用和创建类，但除了前两层之外，我无法获得数据返回，例如，我试图检索价格，但不知道如何提取数据?

This is the code I'm using and it returns nothing:

这是我正在使用的代码，它没有返回任何东西:

<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

Thanks for any help

感谢任何帮助

Using JSON.net framework I changed my Classes to the following but still don't get anything back for the price?

使用JSON.net框架，我将我的类改为如下，但仍然没有得到任何回报?

   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

2 个解决方案

#1

I'd recommend JSON.net, as SBlackler did. I wrote up a test in C# based on your objects and the JSON object you posted and was able to build everything fine. Here's my code.

我推荐JSON.net, SBlackler就是这么做的。我基于您发布的对象和JSON对象编写了一个c#测试，并且能够很好地构建一切。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);

I'm a bit unsure of the structure of the json object, but inventories appears to be an array. Within the example you posted, it appeared that you were trying to get the "price" value of the first object inside that array, and my code does that. If there are multiple objects in the inventories array, you may want to adjust your objects and the code that populates them accordingly.

我对json对象的结构有点不确定，但是库存似乎是一个数组。在您发布的示例中，似乎您试图获取数组中第一个对象的“price”值，我的代码就是这样做的。如果在inventory数组中有多个对象，您可能需要调整对象和相应填充它们的代码。

Here are my objects:

这是我对象:

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; }
}

The above code assumes there will ALWAYS be at least one object in the inventories array and will only pull from the first one. Following is how you might want to reconstruct the code should there be multiple objects in the inventories array.

上面的代码假设在inventory数组中始终存在至少一个对象，并且仅从第一个对象中提取。下面是如果在inventory数组中有多个对象，您可能希望如何重构代码。

    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);

And the revised objects

和修改后的对象

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; }
}

I hope this solves what you were looking for. Good luck!

我希望这能解决你要找的问题。好运！

#2

Have you taken a look at JSON.net?

你看过JSON.net了吗?

It's a very fast serialization/deserialization framework. Once placed into your project you can do:

这是一个非常快速的序列化/反序列化框架。一旦进入你的项目，你可以做:

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

Homepage is: http://james.newtonking.com/pages/json-net.aspx

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

NB: My example might be slightly off, not checked the syntax of it :)

NB:我的例子可能有点偏离，没有检查它的语法:)