Question

我试图从C＃visual studio 2010中的Web服务解析一些结果，这些结果是以JSON形式返回的，但是名为data的字段有时是字符串，有时是对象。我不确定如何获得数据合同来处理这个问题。当它运行反序列化时，它只返回所有内容的null结果。如果我尝试的网络请求没有任何profile_results，那么就可以了。

JSON看起来像这样

{
"ListSingleOrganization": {
"id": 86270,
"short_name": "someshort name",
"long_name": "Long name",
"created_at": "2014-05-02T14:21:06Z",
"is_disabled": false,
"description": "Verbose description",
"renewed_at": "2014-05-02T14:21:07Z",
"alternate_id": null,
"website_url": "http://www.url.com",
"member_count": 50,
"pic_url": "https://www.somepicture.com/1.jpg",
"umbrella_id": 36016,
"keywords": "Fraternity, Leadership, Human Service, Scholarship",
"category": {
  "id": 53282,
  "name": "Fraternities"
},
"profile_responses": [
  {
    "element": {
      "id": 51350,
      "name": "Group Email Address",
      "type": "Email"
    },
    "data": "groupsemail@gmail.com"
  },
  {
    "element": {
      "id": 1239634,
      "name": "Please list your organization's Twitter handle so we may follow you with our office's account. (@something)",
      "type": "TextField"
    },
    "data": "@handle"
  },
  {
    "element": {
      "id": 1192652,
      "name": "Is this a new organization?",
      "type": "Radio"
    },
    "data": {
      "id": 2003570,
      "name": "No"
      }
    }
  ]
 }
}

差异是基于元素类型，但我不知道如何用它们具有相同的名称来解释它。

现在我有

[DataContract]
class ListSingleOrganization
{
 //other members

[DataMember(Name = "profile_responses")]
public List<profile_responses> profile_responses { get; set; }
}

[DataContract]
class profile_responses
{
    [DataMember(Name = "element")]
    public element element { get; set; }
    [DataMember(Name="data")]
    public data data {get; set; }

}

[DataContract]
class element
{
[DataMember(Name = "id")]
public int id { get; set; }

[DataMember(Name = "name")]
public string name { get; set; }

[DataMember(Name = "type")]
public string type { get; set; }


}
[DataContract]
class data
{
[DataMember(Order=1)]
public string raw { get; set; }
[DataMember(Name = "file_name")]
public string file_name { get; set; }
[DataMember(Name = "url")]
public string url { get; set; }
[DataMember(Name = "id")]
public int id { get; set; }
[DataMember(Name = "name")]
public string name { get; set; }

}

Answer 1

您可以创建自定义格式化程序来读取属性，检查它是否为字符串。如果它是一个字符串，则创建数据类的新实例，并将其中一个属性设置为字符串值。否则，将其反序列化为您的数据对象。

public class JsonDataConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return (objectType == typeof(data));
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        data returnVal = null;

         // You may need to debug this and see which token type is being returned
         // per data element and adjust, but the principle stands.
         if (reader.TokenType == JsonToken.String)
         {
             returnVal = new data();
             returnVal.raw = reader.ReadAsString();
         }
        else
        {
            returnVal = serializer.Deserialize<data>(reader);
        }

        return returnVal;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    { 
        // Assuming you only need to deserialize
        throw new NotImplementedException();
    }
}

将JsonConverter与您的财产关联：

    [DataMember(Name = "data")]
    [JsonConverter(typeof(JsonDataConverter))]
    public data data { get; set; }

编辑：（回答跟进问题）在一个单独的单元测试中进行设置，并在尝试将其放入SSIS包之前先让它在那里工作。如果您使用DataContractSerializer，则不会调用JsonDataConverter类。您想使用Json.NET反序列化：

using Newtonsoft.Json;

. . .

var orgList JsonConvert.DeserializeObject<ListSingleOrganization>(webServiceResultString);

Answer 2

无法使用DataContract Serializes来处理这些违规行为，所以我选择了动态对象路线，并且运行良好。

Deserialize JSON into C# dynamic object?

Datacontract对象和字符串

2 个答案: