从json中读取特定的对象数据

Question

我想从url中获取json的特定对象数据，下面的代码给了我。我需要第二个对象＆＃39; EmailAddressSuffices＆＃39;  

    WebRequest request = WebRequest.Create(
      "https://atea-dev.accesscontrol.windows.net/v2/metadata/IdentityProviders.js?protocol=wsfederation&realm=https%3a%2f%2flocalhost%3a44300%2fAccount%2fLoginCallback%2f&reply_to=https%3a%2f%2flocalhost%3a44300%2fAccount%2fLoginCallback%2f&context=&request_id=&version=1.0&callback=");
    request.Credentials = CredentialCache.DefaultCredentials;
    WebResponse response = request.GetResponse();
    Stream dataStream = response.GetResponseStream();
    StreamReader reader = new StreamReader(dataStream);
    string responseFromServer = reader.ReadToEnd();

Answer 1

使用JSON.Net，您可以轻松地反序列化JSON响应：

解决方案1 ​​

1。创建一个类来将JSON映射到：

public class ResponseObject
{

    [JsonProperty("Name")]
    public string Name { get; set; }

    [JsonProperty("LoginUrl")]
    public string LoginUrl { get; set; }

    [JsonProperty("LogoutUrl")]
    public string LogoutUrl { get; set; }

    [JsonProperty("ImageUrl")]
    public string ImageUrl { get; set; }

    [JsonProperty("EmailAddressSuffixes")]
    public IList<string> EmailAddressSuffixes { get; set; }
}

2。使用JsonConvert.Deserialize<ResponseObject>()

反序列化您的JSON

var myresponse = JsonConvert.DeserializeObject<List<ResponseObject>>(responseFromServer);
string email = myresponse[1].EmailAddressSuffixes[0];

解决方案2

如果您不想打扰整个事物，那么您可以这样做：

JArray array = JArray.Parse(responseFromServer);
string q = array[1]["EmailAddressSuffixes"][0].ToString();

但是你应该确保你的对象具有正确的格式（以及数组中正确数量的项目。