c# - JSON ページを解析しています

Question

Twitter検索ページから「in_reply_to_status_id_str -> id_str」を解析する方法を見つけようとしています：

https://twitter.com/phoenix_search.phoenix?q=hello&headers%5BX-Twitter-Polling%5D=true&headers%5BX-PHX%5D=true&since_id=203194965877194752&include_entities=1&include_available_features=1&contributor_details=true&mode=relevance&query_source=unknown

それがどのように行われるかを示すために小さな例を書くことができる人はいますか?

Answer 1

Json.Netの使用

dynamic jObj = JsonConvert.DeserializeObject(new WebClient().DownloadString("your url"));
foreach (var item in jObj.statuses)
{
    Console.WriteLine("{0} {1}", item.in_reply_to_status_id_str, item.id_str);
}

Answer 2

ここで Json をプルします。これが私のリストを作成する場所です。

public JsonResult AllStatuses() //from the json called in the _client view
    {
        var buildStatuses = new List<BuildStatus>();
        var projects = Client.AllProjects();           

        foreach (var project in projects)
        {                
            try 
            {
                var buildConfigs = Client.BuildConfigsByProjectId(project.Id);

                foreach (var buildConfig in buildConfigs)
                {
                    var b = new BuildStatus();
                    var build = Client.LastBuildByBuildConfigId(buildConfig.Id);
                    var status = build.Status; // Used to loop through BuildConfigID's to find which is a FAILURE, SUCCESS, ERROR, or UNKNOWN

                    var change = Client.LastChangeDetailByBuildConfigId(buildConfig.Id); // Provides the changeID
                    var changeDetail = Client.ChangeDetailsByChangeId(change.Id); // Provides the username, this one populates the usernames

                    if (changeDetail != null)
                        b.user = changeDetail.Username;

                    b.id = buildConfig.Id.ToString();

                    // If the date isn't null place the start date in long format
                    if (build.StartDate != null)
                        b.date = build.StartDate.ToString();

                    // If block; set the status based on the BuildconfigID from the var status
                    if (status.Contains("FAILURE")){
                        b.status = "FAILURE";
                    }
                    else if (status.Contains("SUCCESS")){
                        b.status = "SUCCESS";
                    }
                    else if (status.Contains("ERROR")){
                        b.status = "ERROR";
                    }
                    else{
                        b.status = "UNKNOWN";
                    }
                    buildStatuses.Add(b);
                }

            } catch { }

        }
        var query = buildStatuses.OrderBy(x => x.status); // Create a sorted list from Error - Unknown               

        return Json(query, JsonRequestBehavior.AllowGet);

次に、リンクした JsonConverter もコピーしました。

私のウェブサイトで、最終的に Json のリストを分解しました。

 public JsonResult AllStatuses() //from the json called in the _client view
    {
        List<Client> clients = storeDB.Clients.Include("Projects").Include("Projects.Builds").ToList();
        var buildStatuses = new List<BuildStatus>();

        foreach (var client in clients) {
            // Network credentials
            // Used to get the Json Service request                         // URL here: client.ClientURL
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://localhost:81/Status/AllStatuses");
            var response = request.GetResponse();
            var reader = new StreamReader(response.GetResponseStream());
            var responseString = reader.ReadToEnd();

            var serializer = new JavaScriptSerializer();
            serializer.RegisterConverters((new[] { new DynamicJsonConverter() }));
            dynamic obj = serializer.Deserialize(responseString, typeof(object)) as dynamic;

            foreach (var objects in obj) // Pull apart the dynamic object
            {
                var id = objects.id;
                var status = objects.status;
                var date = objects.date;
                var user = objects.user;

                var bs = new BuildStatus();
                try
                {
                    bs.status = status;
                    bs.date = date;
                    bs.id = id;
                    bs.user = user;
                }
                catch { throw; }
                buildStatuses.Add(bs);
            }
        }              

        return Json(buildStatuses, JsonRequestBehavior.AllowGet);
    }

Answer 3

You could also use the DataContractJsonSerializer class available in .NET once you add a reference to System.Runtime.Serialization.

All you need to do is a create two DataContract classes. Something like:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;

namespace MyNamespace
{
   [DataContract]
   public class TwitterObject
   {
      [DataMember(Name = "statuses")]
      public TwitterStatus[] Statuses { get; set; }
   }

   [DataContract]
   public class TwitterStatus
   {
       [DataMember(Name = "in_reply_to_status_id_str")]
       public string InReplyToStatusIdStr { get; set; }

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

Then from any other method you wish, you just have to use the DataContractJsonSerializer to build your JSON into a .NET object:

DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(TwitterObject));

// assume the twitterResponse is the JSON you receive
MemoryStream memoryStream = new MemoryStream(Encoding.ASCII.GetBytes(twitterResponse));

var twitterJson = jsonSerializer.ReadObject(memoryStream) as TwitterObject;

There may be some typos, but this should give you the hint. I'm currently working on an extensive synchronization between a server app and a website and this is the method I currently use for JSON communication between the two. I've found the combination of DataContracts and DataContractJsonSerializer is easier to use than 3rd party libraries.

Answer 4

jQuery アプローチに進みます。

var obj = jQuery.parseJSON(jsonString);
alert(obj.in_reply_to_status_id_str.id_str);

Answer 5

これを実現するには、このjson ライブラリを使用できます。