Question

我正在尝试解析Json中的Open Exchange Rates JSON，我正在使用这种方法：

HttpWebRequest webRequest = GetWebRequest("http://openexchangerates.org/latest.json");

HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse();
string jsonResponse = string.Empty;
using (StreamReader sr = new StreamReader(response.GetResponseStream()))
{
    jsonResponse = sr.ReadToEnd();
}

var serializer = new JavaScriptSerializer();
CurrencyRateResponse rateResponse = serializer.Deserialize<CurrencyRateResponse>(jsonResponse);

如果我理解JavaScriptSerializer.Deserialize正确，我需要定义和对象将Json转换为。

我可以使用如下数据类型成功序列化它：

public class CurrencyRateResponse
{
    public string disclaimer  { get; set; }
    public string license { get; set; }
    public string timestamp { get; set; }
    public string basePrice { get; set; }        
    public CurrencyRates rates { get; set; }
}

public class CurrencyRates
{
    public string AED  { get; set; }    
    public string AFN  { get; set; }    
    public string ALL  { get; set; }    
    public string AMD  { get; set; }  
}

我希望能够用以下内容重播“CurrencyRates汇率”：

public Dictionary<string, decimal> rateDictionary { get; set; }

但是解析器总是将rateDictionary返回为null。知道这是否可行，或者你有更好的解决方案吗？

编辑： Json看起来像这样：

{
    "disclaimer": "this is the disclaimer",
    "license": "Data collected from various providers with public-facing APIs",
    "timestamp": 1328880864,
    "base": "USD",
    "rates": {
        "AED": 3.6731,
        "AFN": 49.200001,
        "ALL": 105.589996,
        "AMD": 388.690002,
        "ANG": 1.79
    }
}

Answer 1

如果你的json是这样的：

{"key":1,"key2":2,...}

然后你应该能够做到：

Dictionary<string, string> rateDict = serializer.Deserialize<Dictionary<string, string>>(json);

编译：

string json = "{\"key\":1,\"key2\":2}";
var ser = new System.Web.Script.Serialization.JavaScriptSerializer();
var dict = ser.Deserialize<Dictionary<string, int>>(json);

你应该能够从这里想出来。

Answer 2

此代码适用于您的示例数据

public class CurrencyRateResponse
{
    public string disclaimer { get; set; }
    public string license { get; set; }
    public string timestamp { get; set; }
    public string @base { get; set; }
    public Dictionary<string,decimal> rates { get; set; }
}

JavaScriptSerializer ser = new JavaScriptSerializer();
var obj =  ser.Deserialize<CurrencyRateResponse>(json);
var rate = obj.rates["AMD"];

Answer 3

    Below code will work fine, CurrencyRates is collection so that by using List we can take all reates.
    This should work!!

    public class CurrencyRateResponse
    {
        public string disclaimer  { get; set; }
        public string license { get; set; }
        public string timestamp { get; set; }
        public string basePrice { get; set; }        
        public List<CurrencyRates> rates { get; set; }
    }

    public class CurrencyRates
    {
        public string AED  { get; set; }    
        public string AFN  { get; set; }    
        public string ALL  { get; set; }    
        public string AMD  { get; set; }  
    }

JavaScriptSerializer ser = new JavaScriptSerializer();
var obj =  ser.Deserialize<CurrencyRateResponse>(json);
var rate = obj.rates["AMD"];

JavaScriptSerializer.Deserialize（）到字典中

3 个答案: