C#.Net JSON 序列化不起作用

Question

谁能告诉我为什么反序列化这个 JSON 响应时会出错？

    public T PostData<T>(string command, Dictionary<string, object> postData)
    {
        postData.Add("command", command);
        postData.Add("nonce", Helper.GetCurrentHttpPostNonce());

        var jsonString = PostString(Helper.ApiUrlHttpsRelativeTrading, postData.ToHttpPostString());
        var output = JsonSerializer.DeserializeObject<T>(jsonString);

        return output;
    }

    [SuppressMessage("Microsoft.Usage", "CA2202:Do not dispose objects multiple times")]
    internal static T DeserializeObject<T>(this JsonSerializer serializer, string value)
    { 
        using (var stringReader = new StringReader(value)) {
            using (var jsonTextReader = new JsonTextReader(stringReader)) {
                /*   
                    An exception of type 'Newtonsoft.Json.JsonSerializationException' occurred in Newtonsoft.Json.dll but was not handled in user code
                    Additional information: Could not create an instance of type Jojatekok.PoloniexAPI.WalletTools.IBalance. Type is an interface or abstract class and cannot be instantiated. Path '1CR.available', line 1, position 20. 

                    ERROR's ON NEXT LINE :
                */
                return (T)serializer.Deserialize(jsonTextReader, typeof(T));
            }
        }
    }

返回的字符串值为： {"1CR":"available":"0.00000000","onOrders":"0.00000000","btcValue":"0.00000000"}}

我有一个天平接口：

public interface IBalance
{
    double QuoteAvailable { get; }
    double QuoteOnOrders { get; }
    double BitcoinValue { get; }
}

还有一个平衡模型：

public class Balance : IBalance
{
    [JsonProperty("available")]
    public double QuoteAvailable { get; private set; }
    [JsonProperty("onOrders")]
    public double QuoteOnOrders { get; private set; }
    [JsonProperty("btcValue")]
    public double BitcoinValue { get; private set; }
}

虽然它没有将 JSON 反序列化为 Balance 对象。我收到此错误：

(An exception of type 'Newtonsoft.Json.JsonSerializationException' occurred in Newtonsoft.Json.dll but was not handled in user code
Additional information: Could not create an instance of type Jojatekok.PoloniexAPI.WalletTools.IBalance. Type is an interface or abstract class and cannot be instantiated. Path '1CR.available', line 1, position 20.)

此错误在发生的代码中注明。
有什么建议吗？

Answer 1

我可以看到返回的 JSON 字符串中有两个右括号：

{"1CR":"available":"0.00000000","onOrders":"0.00000000","btcValue":"0.00000000"}}

使用正确的 JSON 格式字符串获取 JSON.DeserializeObject<T> 它，我认为它应该可以工作。

Answer 2

Maxim Kosov 的评论和 Kunal Chitkara 的回答似乎都是正确的，我会添加字符串中的第一个标记

"1CR":"available":"0.00000000"

好像也不对，应该只是

"available":"0.00000000"

在您的原始代码中，注释提到这是错误的可能原因：

路径“1CR.available”，第 1 行，位置 20。