c# 将多个 Json 反序列化到同一个列表中

Question

我有一个 Api link return 这个 Json structure。在代码中我请求这个 Api link 然后将它反序列化到一个列表中。这是没有问题的。但是如果 Api return 超过 50 "counts" 它会创建另一个页面。我如何遍历所有页面并将所有内容添加到现有列表？

在我 linked 的情况下，将有 38 页。都需要添加到列表中。

通话

    // spidyApiUrl = http://www.gw2spidy.com/api/v0.9/json/item-search/iron/1
var spidyApi_idByName_result = api_Handler.objFromApi_idToName(spidyApiUrl);

函数与return

public RootObject objFromApi_idToName(string url)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

            WebResponse response = request.GetResponse();
            using (Stream responseStream = response.GetResponseStream())
            {
                StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
                var jsonReader = new JsonTextReader(reader);
                var serializer = new JsonSerializer();
                //return serializer.Deserialize<RootObject>(jsonReader);
                RootObject rootObject = serializer.Deserialize<RootObject>(jsonReader);

                if (rootObject.count > 0) { return rootObject; }
                else { return null; }

            }

        }

当然我还有 get; set; 类.

我如何遍历所有页面（如果存在多个页面，这不是必须的）并将它们添加到同一个对象列表。

Answer 1

您需要继续下载数据直到 page == last_page 当您获得每一页数据时，您然后将新的 results 集添加到原始 rootObject 的 results 属性与 AddRange

我还更改了从

传递到函数中的 url

http://www.gw2spidy.com/api/v0.9/json/item-search/iron/1

至

http://www.gw2spidy.com/api/v0.9/json/item-search/iron

这允许我将页码添加到 url 以获取所有页面

http://www.gw2spidy.com/api/v0.9/json/item-search/iron/1
http://www.gw2spidy.com/api/v0.9/json/item-search/iron/2
.....
http://www.gw2spidy.com/api/v0.9/json/item-search/iron/38

代码：

public class Result
{
    public int data_id { get; set; }
    public string name { get; set; }
    public int rarity { get; set; }
    public int restriction_level { get; set; }
    public string img { get; set; }
    public int type_id { get; set; }
    public int sub_type_id { get; set; }
    public string price_last_changed { get; set; }
    public int max_offer_unit_price { get; set; }
    public int min_sale_unit_price { get; set; }
    public int offer_availability { get; set; }
    public int sale_availability { get; set; }
    public int sale_price_change_last_hour { get; set; }
    public int offer_price_change_last_hour { get; set; }
}

public class RootObject
{
    public int count { get; set; }
    public int page { get; set; }
    public int last_page { get; set; }
    public int total { get; set; }
    public List<Result> results { get; set; }
}

class Program
{
    static void Main(string[] args)
    {
        objFromApi_idToName("http://www.gw2spidy.com/api/v0.9/json/item-search/iron");
    }

    public static RootObject objFromApi_idToName(string url)
    {
        RootObject rootObject = null;
        RootObject tempRootObject = null;
        int page = 1;
        do
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "/" + page);

            WebResponse response = request.GetResponse();
            using (Stream responseStream = response.GetResponseStream())
            {
                StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
                var jsonReader = new JsonTextReader(reader);
                var serializer = new JsonSerializer();
                //return serializer.Deserialize<RootObject>(jsonReader);
                tempRootObject = serializer.Deserialize<RootObject>(jsonReader);

                if (rootObject == null)
                {
                    rootObject = tempRootObject;
                }
                else
                {
                    rootObject.results.AddRange(tempRootObject.results);
                    rootObject.count += tempRootObject.count;
                }
            }
            page++;
        } while (tempRootObject != null && tempRootObject.last_page != tempRootObject.page);
        return rootObject;
    }
}

Answer 2

您在使用网络 API 吗？如果是这样，你能试试这样吗？

public RootObject objFromApi_idToName(string url)
    {
        using (var client = new HttpClient())
        {
            client.BaseAddress = new Uri("<your uri here>");
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            HttpResponseMessage response = await client.GetAsync("<uri extention here>");
            if (response.IsSuccessStatusCode)
            {
                string jsonStr = await response.Content.ReadAsStringAsync();
                var deserializedResponse = JsonConvert.DeserializeObject<List<your model class here>>(jsonStr);
                return deserializedResponse;
        }
    }

c# 将多个 Json 反序列化到同一个列表中

c# deserialize mutliple Json into same list

c#

serialization

json

list