c# - 在 MVC 中反序列化 JSON

Question

我是 .NET 和 MVC 的新手。努力将一些 JSON 反序列化为 ViewBag 中的对象。 JSON 来自 Azure 搜索。我已经验证了 WebHttpRequest 返回 JSON，如下所示:

{
    "@odata.context": "https://url.toazuresearch/indexes('index01')/$metadata#docs",
    "value": [
        {
            "@search.score": 0.31507686,
            "Id": "34",
            "Date": "2017-08-24T09:14:56.193Z",
            "Domain": "domain.com",
            "RuleName": "Legacy Reports",
            "Log": "Log text",
            "ChangeId": "changeId",
            "ParentId": "0",
            "Comments": "Comments"
        },
        {
            "@search.score": 0.2553736,
            "Id": "35",
            "Date": "2017-08-24T09:14:56.193Z",
            "Domain": "domain.com",
            "RuleName": "Legacy Reports",
            "Log": "Log text",
            "ChangeId": "changeId",
            "ParentId": "0",
            "Comments": "Comments"
        }
    ]
}

我的类(class)是这样的:

[DataContract]
public class SearchResult
{
    [DataMember]
    public float SearchScore { get; set; }
    [DataMember]
    public string Id { get; set; }
    [DataMember]
    public DateTime Date { get; set; }
    [DataMember]
    public string Domain { get; set; }
    [DataMember]
    public string RuleName { get; set; }
    [DataMember]
    public string Log { get; set; }
    [DataMember]
    public string ChangeId { get; set; }
    [DataMember]
    public string ParentId { get; set; }
    [DataMember]
    public string Comments { get; set; }
}

我在 Controller 中处理响应的代码:

try
{
    WebResponse response = request.GetResponse();
    using (Stream responseStream = response.GetResponseStream())
    {
        StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);

        DataContractJsonSerializer serializer = 
            new DataContractJsonSerializer(typeof(IEnumerable<SearchResult>));
        var results = 
            (IEnumerable<SearchResult>)serializer.ReadObject(responseStream);

        ViewBag.SearchResults = results;
    }
}
catch (WebException ex)
{
    WebResponse errorResponse = ex.Response;
    using (Stream responseStream = errorResponse.GetResponseStream())
    {
        StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
        ViewBag.SearchError = reader.ReadToEnd();
        ViewBag.SearchResults = "0 Results";

    }
    throw;
}

最后，我尝试在我的 View 中循环显示结果:

@foreach (var searchResult in ViewBag.SearchResults)
{
    @searchResult.Id <br />
}

我刚刚得到一个空白页面。我在VS中测试时没有异常(exception)。

Answer 1

使用Json.Net而不是 DataContractJsonSerializer 更容易。

首先你的模型:

public class Value
{
    [JsonProperty("@search.score")]
    public double SearchScore { get; set; }
    public string Id { get; set; }
    public string Date { get; set; }
    public string Domain { get; set; }
    public string RuleName { get; set; }
    public string Log { get; set; }
    public string ChangeId { get; set; }
    public string ParentId { get; set; }
    public string Comments { get; set; }
}

public class RootObject
{
    [JsonProperty("@odata.context")]
    public string Contextcontext { get; set; }
    public List<Value> value { get; set; }
}

序列化代码:

var result = JsonConvert.DeserializeObject<RootObject>(reader.ReadToEnd());

编辑

如果您确实想使用DataContractJsonSerializer方式，您的模型将是

[DataContract]
public class SearchResult
{
    [DataMember(Name = "@search.score")]
    public float SearchScore { get; set; }
    [DataMember]
    public string Id { get; set; }
    [DataMember]
    public DateTime Date { get; set; }
    [DataMember]
    public string Domain { get; set; }
    [DataMember]
    public string RuleName { get; set; }
    [DataMember]
    public string Log { get; set; }
    [DataMember]
    public string ChangeId { get; set; }
    [DataMember]
    public string ParentId { get; set; }
    [DataMember]
    public string Comments { get; set; }
}

[DataContract]
public class RootObject
{
    [DataMember(Name = "@odata.context")]
    public string Context { get; set; }
    [DataMember]
    public List<SearchResult> value { get; set; }
}

您的序列化代码(请参阅日期时间处理代码)

var settings = new DataContractJsonSerializerSettings()
{
    DateTimeFormat = new DateTimeFormat(@"yyyy-MM-ddTHH:mm:ss.fffZ", CultureInfo.InvariantCulture)
};
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(RootObject),settings);

var results =  (RootObject)serializer.ReadObject(responseStream);