使用 DataContractJsonSerializer 解析 JSON 时出现异常

Question

我不知道这是我还是我得到的 JSON。无论如何，我正在阅读另一篇我认为相关的文章，但当他弄清楚他需要做什么时，我不知道这些人在说什么more json c# issues

这是我现在得到的 JSON 示例

{
    "totalResult": 2,
    "merchants": {
        "1718167": {
            "merchantRank": "29",
            "merchantName": "bob the builders factory",
            "merchantSlogan": "if he can't fix it we can",
            "merchantBdesc": "",
            "merchantLogo": "pic1.gif",
            "merchantLink": "http:\/\/www.randomlink.com\/",
            "merchantAddress": "place
street St
area
city
1111",
            "merchantLat": "-15.9935425",
            "merchantLng": "58.0836955",
            "merchantGeoLevel": "st",
            "merchantDistance": "0.00",
            "merchantCategories": "builder",
            "merchantEmail": "",
            "merchantUrl": "http:\/\/www.randomlink.com\/",
            "merchantPhone": "0123456789",
            "merchantMobile": "",
            "merchantSrc": "AJF"
        },
        "113711": {
            "merchantRank": "229",
            "merchantName": "A A A Builders",
            "merchantSlogan": "",
            "merchantBdesc": "",
            "merchantLogo": "pic26.gif",
            "merchantLink": "http:\/\/www.randomlink.com\/",
            "merchantAddress": "",
            "merchantLat": "",
            "merchantLng": "",
            "merchantGeoLevel": "",
            "merchantDistance": "0.00",
            "merchantCategories": "Builder",
            "merchantEmail": "here@randomlink.com",
            "merchantUrl": "http:\/\/randomlink.com",
            "merchantPhone": "0123456789",
            "merchantMobile": "",
            "merchantSrc": "GHF"
        }
    }
}

无论如何，为了保持理智，我已经减少了结果的数量，所以我试图为此构建数据合约，但我遇到了以前遇到的问题，其中一些巧妙的技巧让我得到了我想要的结果需要。不过这次不一样了……

使用 [DataContract] 我可以获得 totalResult，但是，为了让商家我不断收到错误...我相信因为“113711”和“113711”是动态的，这会导致创建一个问题数据模型。所以我想也许一本字典可以解决这个问题。但是，每当我尝试时，我都会出错！

这是我尝试使用的：

[DataContract]
public class result
{
    [DataMember(Name = "totalResult")]
    public string totalResult { get; set; }
    [DataMember(Name = "merchants")]
    public Dictionary<string, metchant_info> merchants { get; set; }
}
[DataContract]
public class metchant_info
{
    [DataMember(Name = "merchantRank")]
    public string merchantRank;
    [DataMember(Name = "merchantName")]
    public string merchantName;
    [DataMember(Name = "merchantSlogan")]
    public string merchantSlogan;
    [DataMember(Name = "merchantBdesc")]
    public string merchantBdesc;
    [DataMember(Name = "merchantLogo")]
    public string merchantLogo;
    [DataMember(Name = "merchantLink")]
    public string merchantLink;
    [DataMember(Name = "merchantAddress")]
    public string merchantAddress;
    [DataMember(Name = "merchantLat")]
    public string merchantLat;
    [DataMember(Name = "merchantLng")]
    public string merchantLng;
    [DataMember(Name = "merchantGeoLevel")]
    public string merchantGeoLevel;
    [DataMember(Name = "merchantDistance")]
    public string merchantDistance;
    [DataMember(Name = "merchantCategories")]
    public string merchantCategories;
    [DataMember(Name = "merchantEmail")]
    public string merchantEmail;
    [DataMember(Name = "merchantUrl")]
    public string merchantUrl;
    [DataMember(Name = "merchantPhone")]
    public string merchantPhone;
    [DataMember(Name = "merchantMobile")]
    public string merchantMobile;
    [DataMember(Name = "merchantSrc")]
    public string merchantSrc;
}

这是背后的代码......

            try
            {
                Stream responseStream = e.Result;
                DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(result));
                result response = (result)ser.ReadObject(responseStream);
            }
            catch (Exception ex)
            {
                return;
            }

我目前遇到的错误是：

"Could not evaluate expression"

如果你想要堆栈跟踪，我会发布它，但它有相当多的无用信息......此外，如果你将数据成员 Merchants 更改为字符串，你将看到以下错误：

"System.Collections.Generic.Dictionary`2[System.String,System.Object]"

那么……有什么想法吗？

Answer 1

使用Json.Net，您可以如下动态处理案例

var obj = (JObject)JsonConvert.DeserializeObject(json);

foreach (var item in obj["merchants"])
{
    Console.WriteLine(item.First()["merchantName"]);
}

或者您可以在循环中将每个 merchant 反序列化为您的 metchant_info 对象

foreach (var item in obj["merchants"])
{
    var m = JsonConvert.DeserializeObject<metchant_info>(item.First().ToString());
    Console.WriteLine(m.merchantName);
}

Answer 2

我没有可行的解决方案，但经过一番研究，我发现了以下信息：

看这个问题：How would I read into a 'nested' Json file with 'DataContractJsonSerializer' in C# .NET (win7 phone)? 问题好像是这个

public Dictionary<string, metchant_info> merchants { get; set; }

Serializer 处理字典的方式似乎存在问题：Deserialization problem with DataContractJsonSerializer

Any way to make DataContractJsonSerializer serialize Dictionaries properly?

希望你能弄清楚。