Question

作为Bitbucket REST API的响应，我得到以下JSON对象（简化版）：

{
    "repositories": [
        {
            "scm": "hg",
            "has_wiki": false,            
            "language": "c#",
            "slug": "Repo1"
        },
        {
            "scm": "hg",
            "has_wiki": false,            
            "language": "java",
            "slug": "Repo2"
        },
        {
            "scm": "hg",
            "has_wiki": true,            
            "language": "c#",
            "slug": "Repo3"
        }
    ],
    "user": {
        "username": "someuser",
        "first_name": "Some",
        "last_name": "User",
        "display_name": "Some User",
        "is_team": false,
        "avatar": "https://someuseravatar.com",
        "resource_uri": "/1.0/users/someuser"
    }
}

我需要反序列化这个JSON对象的唯一部分是user部分。为此，我创建了以下类：

[DataContract(Name="user")]
public class BitbucketUser
{
    [DataMember(Name = "username")]
    public string Username { get; set; }

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

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

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

    [DataMember(Name = "is_team")]
    public bool IsTeam { get; set; }

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

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

用于反序列化json的辅助方法：

public static T Deserialize<T>(string json)
{
    DataContractJsonSerializer deserializer = new DataContractJsonSerializer(typeof(T));
    using (MemoryStream stream = new MemoryStream(Encoding.Unicode.GetBytes(json)))
    {
        T result = (T)deserializer.ReadObject(stream);
        return result;
    }
}

因此，当我尝试使用此代码获取反序列化的User对象时：

User user = JsonHelper.Deserialize<User>(jsonResponse);

然后我创建了user对象，其中包含所有属性null。我试图找到在类头上使用的正确属性，但结果是一样的。而且我也没有使用Json.NET库来避免额外的库引用以及我没有创建包装类来将该用户对象保存为User类型的属性并将对象重新存储为数组存储库[]类型。是否有解决此问题的方法来获取没有空字段的反序列化用户对象？

Answer 1

您的代码不起作用，因为您要反序列化的JSON对象没有任何User属性。反序列化器肯定不会尝试查看当前对象的子项以查看是否匹配。

您应该做的是创建一个表示整个响应对象的类型。如果您对repositories部分不感兴趣，那么就省略它。

以下代码适用于我：

[DataContract]
public class BitbucketResponse
{
    [DataMember(Name="user")]
    public BitbucketUser User { get; set; }
}

[DataContract]
public class BitbucketUser
{
    [DataMember(Name = "username")]
    public string Username { get; set; }

    // etc.
}

…

var serializer = new DataContractJsonSerializer(typeof(BitbucketResponse));
using (var stream = …)
{
    var response = (BitbucketResponse)serializer.ReadObject(stream);
    var user = response.User;
}

Answer 2

我正在为您编写代码，它将帮助您将对象从json反序列化到yourClassCustomObject。

private async Task<List<BitbucketUser>> MyDeserializerFunAsync()
{
    List<BitbucketUser> book = new List<BitbucketUser>();
    try
    {
       //I am taking my url from appsettings. myKey is my appsetting key. You can write direct your url.
       string url = (string)appSettings["mykey"];
       var request = HttpWebRequest.Create(url) as HttpWebRequest;
       request.Accept = "application/json;odata=verbose";
       var factory = new TaskFactory();
       var task = factory.FromAsync<WebResponse>(request.BeginGetResponse,request.EndGetResponse, null);
       var response = await task;
       Stream responseStream = response.GetResponseStream();
       string data;
       using (var reader = new System.IO.StreamReader(responseStream))
       {
           data = reader.ReadToEnd();
       }
       responseStream.Close();
       DataContractJsonSerializer json = new DataContractJsonSerializer(typeof(List<BitbucketUser>));
       MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(data));
       book = (List<BitbucketUser>)json.ReadObject(ms);
       return book;
   }
}

上面的代码在我的wp8应用程序中工作，你可以尝试更快，它会帮助你。我正在执行异步操作，但您可以使用BitbucketUser返回类型创建简单方法。

使用DataContractJsonSerializer对JSON对象进行部分反序列化

2 个答案: