Question

我尝试使用JSON.NET解析一些JSON，但每当我尝试从任何值中获取值时，它都会返回0.我只想从第一组数据中获取值。这是我的代码：

filters.click(function(e){
    e.preventDefault();
    var f = $(this);
    if(f.is('.active')){
        // Apply filters only once
        return false;
    }
    filters.removeClass('active');
    f.addClass('active');
    // Clone the canvas
    var clone = originalCanvas.clone();
    // Clone the image stored in the canvas as well
    clone[0].getContext('2d').drawImage(originalCanvas[0],0,0);
    // Add the clone to the page and trigger
    // the Caman library on it
    photo.find('canvas').remove().end().append(clone);
    var effect = $.trim(f[0].id);
    Caman(clone[0], function () {
        // If such an effect exists, use it:
        if( effect in this){
            this[effect]();
            this.render();
            showDownload(clone[0]);
        }
        else{
            hideDownload();
        }
    });
});
// Use the mousewheel plugin to scroll
// scroll the div more intuitively
filterContainer.find('ul').on('mousewheel',function(e, delta){
    this.scrollLeft -= (delta * 50);
    e.preventDefault();
});

这是我的JSON对象类：

string text = listBox1.SelectedItem.ToString();
text = text.Substring(text.LastIndexOf(": ") + 2);
string url = "http://www.gw2spidy.com/api/v0.9/json/item-search/" + text + "/1";
var json = new WebClient().DownloadString(url);

Result itemPrices = JsonConvert.DeserializeObject<Result>(json);

int buyPrice = itemPrices.min_sale_unit_price;
int sellPrice = itemPrices.max_offer_unit_price;

sellPriceLabel.Content = "Highest Sell Price: " + sellPrice;
buyPriceLabel.Content = "Lowest Buy Price: " + buyPrice;

以下是我要解析的JSON：

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; }
}

Answer 1

刚刚更改了以下代码：

var itemPrices = JsonConvert.DeserializeObject<RootObject>(json);

另外我建议您使用serialization attribute这样的创建属性，而不是像data_id那样：

[DataContract(Name = "result")]
public class Result
{
   [DataMamber(Name = "data_id")]
   public int Id {get;set;}

   .........

}

<强>更新

只需确保更改有关返回对象的其余代码。 Desrialize方法返回包含结果列表的RootObejct，因此会影响其余代码

Answer 2

您必须将json文本解析为RootObject，然后通过results属性访问Result对象。

我已经复制了您的文字，附加了大括号＆＃34;}＆＃34;在最后并保存到文件。

一切似乎都有效。

using System;
using System.Collections.Generic;
using System.IO;
using Newtonsoft.Json;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            var json = File.ReadAllText("C:\\Users\\Tynar\\Documents\\json.txt");

            RootObject itemPrices = JsonConvert.DeserializeObject<RootObject>(json);

            int buyPrice = itemPrices.results[0].min_sale_unit_price;
            int sellPrice = itemPrices.results[0].max_offer_unit_price;

            Console.WriteLine(buyPrice);
            Console.WriteLine(sellPrice);
            Console.ReadLine();
        }
    }

    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; }
    }
}

尝试使用JSON.NET在C＃中解析JSON

2 个答案: