C# JsonTextWriter.WriteStartObject方法代码示例

        //IEnumerable<T> WhereActiveOrderBy(
        //REFACTOR: we're building things up in memory, and inefficiently as well...
        //MESS: NAIVE: these are nasty messes of code as well.
        public ActionResult Contracts()
        {
            //get a list with the newest employees/offices for each employee/office code.
            var newestOffices = db.newestOffices();
            var newestEmployees = db.newestEmployees();

            return authenticatedAction(new String[] { "UT", "UR" }, () => {
                content:
                var result = makeJSONResult();
                using (JsonTextWriter w = new JsonTextWriter()) {
                    w.WriteStartArray();
                    foreach (Contract c in db.Contracts.WAOBTL()) {
                        w.writeSharedJSONMembers(c);
                        w.writeSharedJSONProlog();
                        foreach (Company co in db.Companies.Where(tco => tco.contractCode == c.code).WAOBTL()) {
                            w.writeSharedJSONMembers(co);
                            w.WriteMember("offices");
                            w.WriteStartArray();
                            foreach (Office o in newestOffices
                                .Where(o => o.companyCode == co.code)
                                .Where(o => o.contractCode == c.code)
                                .WAOBTL()
                                 ) {
                                w.WriteStartObject();
                                //LOOK AT THIS! WE'RE NOT JUST SENDING OVER THE CODE, BUT THE VERSION AS WELL!
                                w.WriteMember("code");
                                w.WriteString(o.code + "?" + o.version.ToString());
                                w.WriteMember("description");
                                w.WriteString(o.description);
                                w.WriteEndObject();
                            }
                            w.WriteEndArray();
                            w.WriteMember("employees");
                            w.WriteStartArray();
                            foreach (Employee e in newestEmployees
                                .Where(e => e.companyCode == co.code)
                                .Where(e => e.contractCode == c.code)
                                .WAOBTL()) {
                                w.WriteStartObject();
                                //LOOK AT THIS! WE'RE NOT JUST SENDING OVER THE CODE, BUT THE VERSION AS WELL!
                                w.WriteMember("code");
                                w.WriteString(e.code + "?" + e.version.ToString());
                                w.WriteMember("description");
                                w.WriteString(e.firstName + " " + e.lastName);
                                w.WriteEndObject();
                            }
                            w.WriteEndArray();
                            w.WriteEndObject();
                        }
                        w.writeSharedJSONEpilog();
                    }
                    w.WriteEndArray();
                    result.Content = w.ToString();
                }
                logger.Debug("TreesController.Contracts accessed.");
                return result;
            });
        }

        public void Example()
        {
            #region Usage
            StringBuilder sb = new StringBuilder();
            StringWriter sw = new StringWriter(sb);

            using (JsonWriter writer = new JsonTextWriter(sw))
            {
                writer.Formatting = Formatting.Indented;

                writer.WriteStartObject();
                writer.WritePropertyName("CPU");
                writer.WriteValue("Intel");
                writer.WritePropertyName("PSU");
                writer.WriteValue("500W");
                writer.WritePropertyName("Drives");
                writer.WriteStartArray();
                writer.WriteValue("DVD read/writer");
                writer.WriteComment("(broken)");
                writer.WriteValue("500 gigabyte hard drive");
                writer.WriteValue("200 gigabype hard drive");
                writer.WriteEnd();
                writer.WriteEndObject();
            }

            Console.WriteLine(sb.ToString());
            // {
            //   "CPU": "Intel",
            //   "PSU": "500W",
            //   "Drives": [
            //     "DVD read/writer"
            //     /*(broken)*/,
            //     "500 gigabyte hard drive",
            //     "200 gigabype hard drive"
            //   ]
            // }
            #endregion

            Assert.AreEqual(@"{
  ""CPU"": ""Intel"",
  ""PSU"": ""500W"",
  ""Drives"": [
    ""DVD read/writer""
    /*(broken)*/,
    ""500 gigabyte hard drive"",
    ""200 gigabype hard drive""
  ]
}", sb.ToString());
        }

        public override void EndRequest()
        {
            base.EndRequest();

            Context.Response.ContentType = "application/json";
            
            using (var streamWriter = new StreamWriter(Context.Response.OutputStream))
            using (var writer = new JsonTextWriter(streamWriter))
            {
                writer.WriteStartObject();
                writer.WritePropertyName("c");
                writer.WriteValue(_channelId);
                writer.WriteEndObject();
            }
        }

        public void ReadingAndWritingJsonText()
        {
            #region ReadingAndWritingJsonText
            StringBuilder sb = new StringBuilder();
            StringWriter sw = new StringWriter(sb);

            using (JsonWriter writer = new JsonTextWriter(sw))
            {
                writer.Formatting = Formatting.Indented;

                writer.WriteStartObject();
                writer.WritePropertyName("CPU");
                writer.WriteValue("Intel");
                writer.WritePropertyName("PSU");
                writer.WriteValue("500W");
                writer.WritePropertyName("Drives");
                writer.WriteStartArray();
                writer.WriteValue("DVD read/writer");
                writer.WriteComment("(broken)");
                writer.WriteValue("500 gigabyte hard drive");
                writer.WriteValue("200 gigabype hard drive");
                writer.WriteEnd();
                writer.WriteEndObject();
            }

            // {
            //   "CPU": "Intel",
            //   "PSU": "500W",
            //   "Drives": [
            //     "DVD read/writer"
            //     /*(broken)*/,
            //     "500 gigabyte hard drive",
            //     "200 gigabype hard drive"
            //   ]
            // }
            #endregion
        }

        public static string ToJson(this Person p)
        {
            StringWriter sw = new StringWriter();
            JsonTextWriter writer = new JsonTextWriter(sw);

            // {
            writer.WriteStartObject();

            // "name" : "Jerry"
            writer.WritePropertyName("name");
            writer.WriteValue(p.Name);

            // "likes": ["Comedy", "Superman"]
            writer.WritePropertyName("likes");
            writer.WriteStartArray();
            foreach (string like in p.Likes)
            {
                writer.WriteValue(like);
            }
            writer.WriteEndArray();

            // }
            writer.WriteEndObject();

            return sw.ToString();
        }

 //把返回值编译成json格式
 public string uploadFileResult(string result)
 {
     StringBuilder sb = new StringBuilder();
     StringWriter sw = new StringWriter(sb);
     using (JsonWriter jswriter = new JsonTextWriter(sw))
     {
         jswriter.Formatting = Formatting.Indented;
         jswriter.WriteStartObject();
         jswriter.WritePropertyName("result");
         jswriter.WriteValue(result);
         jswriter.WriteEnd();
     }
     return sb.ToString();
 }

        public static void SerializeMessage(JsonTextWriter writer, ServiceType type, object message)
        {
            Require.NotNull(writer, "writer");
            Require.NotNull(type, "type");
            Require.NotNull(message, "message");

            writer.WriteStartObject();

            foreach (var field in type.Fields.Values)
            {
                if (
                    field.ShouldSerializeMethod != null &&
                    !field.ShouldSerializeMethod(message)
                )
                    continue;

                writer.WritePropertyName(field.Tag.ToString(CultureInfo.InvariantCulture));

                object value = field.Getter(message);

                if (value == null)
                {
                    writer.WriteNull();
                }
                else if (field.CollectionType != null)
                {
                    writer.WriteStartArray();

                    foreach (object item in (IEnumerable)value)
                    {
                        if (field.ServiceType != null && !field.ServiceType.Type.IsEnum)
                            SerializeMessage(writer, field.ServiceType, item);
                        else
                            writer.WriteValue(item);
                    }

                    writer.WriteEndArray();
                }
                else 
                {
                    if (field.ServiceType != null && !field.ServiceType.Type.IsEnum)
                        SerializeMessage(writer, field.ServiceType, value);
                    else
                        writer.WriteValue(value);
                }
            }

            writer.WriteEndObject();
        }

 void WriteList(JsonTextWriter writer, ListStatuses list)
 {
     writer.WriteStartObject ();
     writer.WriteKey ("id");
     writer.WriteNumber (list.List.ID);
     writer.WriteKey ("username");
     writer.WriteString (list.Account.ScreenName);
     WriteRestUsage (writer, list.RestInfo);
     writer.WriteEndObject ();
 }

 void WriteSearch(JsonTextWriter writer, SearchStatuses search)
 {
     writer.WriteStartObject ();
     writer.WriteKey ("keywords");
     writer.WriteString (search.Keyword);
     writer.WriteKey ("username");
     writer.WriteString (search.Account.ScreenName);
     WriteRestUsage (writer, search.RestInfo);
     writer.WriteEndObject ();
 }

        public void Save(ConfigSaveDelegate save)
        {
            using (StreamWriter streamWriter = new StreamWriter (ConfigFilePath, false, System.Text.Encoding.UTF8))
            using (JsonTextWriter writer = new JsonTextWriter (streamWriter)) {
                writer.WriteStartObject ();

                writer.WriteKey ("accounts");
                writer.WriteStartArray ();
                for (int i = 0; i < _accounts.Length; i ++)
                    WriteAccount (writer, _accounts[i]);
                writer.WriteEndArray ();

                writer.WriteKey ("searches");
                writer.WriteStartArray ();
                for (int i = 0; i < _searches.Length; i ++)
                    WriteSearch (writer, _searches[i]);
                writer.WriteEndArray ();

                writer.WriteKey ("lists");
                writer.WriteStartArray ();
                for (int i = 0; i < _lists.Length; i++)
                    WriteList (writer, _lists[i]);
                writer.WriteEndArray ();

                save (writer);
                writer.WriteEndObject ();
            }
        }

 void WriteAccount(JsonTextWriter writer, TwitterAccount account)
 {
     writer.WriteStartObject ();
     if (account.Credential is NetworkCredential) {
         NetworkCredential nc = account.Credential as NetworkCredential;
         writer.WriteKey ("username");
         writer.WriteString (nc.UserName);
         writer.WriteKey ("password");
         writer.WriteString (nc.Password);
     } else if (account.Credential is OAuthPasswordCache) {
         OAuthPasswordCache pc = account.Credential as OAuthPasswordCache;
         writer.WriteKey ("username");
         writer.WriteString (pc.UserName);
         writer.WriteKey ("password");
         writer.WriteString (pc.Password);
         writer.WriteKey ("token");
         writer.WriteString (pc.AccessToken);
         writer.WriteKey ("secret");
         writer.WriteString (pc.AccessSecret);
     }
     if (account.SelfUserID > 0) {
         writer.WriteKey ("id");
         writer.WriteNumber (account.SelfUserID);
     }
     writer.WriteKey ("rest");
     writer.WriteStartObject ();
     string[] rest_keys = new string[] {"home", "mentions", "dm"};
     TwitterAccount.RestUsage[] rests = new TwitterAccount.RestUsage[] {account.RestHome, account.RestMentions, account.RestDirectMessages};
     for (int i = 0; i < rest_keys.Length; i ++) {
         writer.WriteKey (rest_keys[i]);
         writer.WriteStartObject ();
         writer.WriteKey ("enable");
         writer.WriteBoolean (rests[i].IsEnabled);
         writer.WriteKey ("count");
         writer.WriteNumber (rests[i].Count);
         writer.WriteKey ("interval");
         writer.WriteNumber ((int)rests[i].Interval.TotalSeconds);
         writer.WriteEndObject ();
     }
     writer.WriteEndObject ();
     writer.WriteKey ("streaming");
     if (account.StreamingClient == null) {
         writer.WriteNull ();
     } else {
         writer.WriteStartObject ();
         writer.WriteKey ("mode");
         if (account.StreamingClient.Target is TwitterAccount) {
             writer.WriteString ("follow");
             writer.WriteKey ("username");
             writer.WriteString ((account.StreamingClient.Target as TwitterAccount).ScreenName);
         } else if (account.StreamingClient.Target is SearchStatuses) {
             writer.WriteString ("track");
             writer.WriteKey ("keywords");
             writer.WriteString (account.StreamingClient.SearchKeywords);
         } else if (account.StreamingClient.Target is ListStatuses) {
             writer.WriteString ("list");
             writer.WriteKey ("id");
             writer.WriteNumber ((account.StreamingClient.Target as ListStatuses).List.ID);
         }
         writer.WriteEndObject ();
     }
     writer.WriteEndObject ();
 }

        protected override void ProcessRequest()
        {
            string httpMethod = Request.RequestType;

            if (!CaselessString.Equals(httpMethod, "GET") &&
                !CaselessString.Equals(httpMethod, "HEAD"))
            {
                throw new JsonRpcException(string.Format("HTTP {0} is not supported for RPC execution. Use HTTP GET or HEAD only.", httpMethod));
            }

            //
            // Response will be plain text, though it would have been nice to 
            // be more specific, like text/json.
            //

            Response.ContentType = "text/plain";
            
            //
            // Convert the query string into a call object.
            //

            JsonWriter writer = new JsonTextWriter();
            
            writer.WriteStartObject();
            
            writer.WriteMember("id");
            writer.WriteNumber(0);
            
            writer.WriteMember("method");
            string methodName = Mask.NullString(Request.PathInfo);
            if (methodName.Length == 0)
                writer.WriteNull();
            else
                writer.WriteString(methodName.Substring(1));
            
            writer.WriteMember("params");
            writer.WriteStartObject();

            NameValueCollection query = Request.QueryString;
            
            if (query.HasKeys())
            {
                foreach (string name in query)
                {
                    if (Mask.NullString(name).Length == 0)
                        continue;
                
                    writer.WriteMember(name);

                    string[] values = query.GetValues(name);                    
                    
                    if (values.Length == 0)
                        writer.WriteNull();
                    else if (values.Length == 1)
                        writer.WriteString(values[0]);
                    else 
                        writer.WriteArray(values);
                }
            }
            
            writer.WriteEndObject();
            
            writer.WriteEndObject();
            
            //
            // Delegate rest of the work to JsonRpcDispatcher.
            //

            JsonRpcDispatcher dispatcher = new JsonRpcDispatcher(Service);
            
            if (HttpRequestSecurity.IsLocal(Request))
                dispatcher.SetLocalExecution();
            
            dispatcher.Process(new StringReader(writer.ToString()), Response.Output);
        }

        private void BuildResponseJson(StringBuilder sb, PendingDownstreamMessage message)
        {
            using (var stringWriter = new StringWriter(sb))
            using (var writer = new JsonTextWriter(stringWriter))
            {
                if (message == null)
                {
                    writer.WriteStartArray();
                    writer.WriteValue("noop");
                    writer.WriteEndArray();
                }
                else
                {
                    var responseType = message.Message.GetType();
                    var responseServiceType = ServiceRegistry.GetAssembly(responseType.Assembly).TypesByType[responseType];

                    writer.WriteStartObject();
                    writer.WritePropertyName("r");
                    writer.WriteValue((int)message.Kind);
                    writer.WritePropertyName("a");
                    writer.WriteValue((int)message.AssociationId);
                    writer.WritePropertyName("t");
                    writer.WriteValue(responseServiceType.Message.Id);
                    writer.WritePropertyName("p");

                    JsonUtil.SerializeMessage(writer, responseServiceType, message.Message);

                    writer.WriteEndObject();
                }
            }
        }

        void SaveConfigInternalStyles(JsonTextWriter writer)
        {
            writer.WriteStartObject ();

            writer.WriteKey ("colors");
            writer.WriteStartObject ();
            SaveConfigInternalColors (writer);
            writer.WriteEndObject ();

            writer.WriteKey ("fonts");
            writer.WriteStartObject ();
            SaveConfigInternalFonts (writer);
            writer.WriteEndObject ();

            writer.WriteKey ("icon_size");
            writer.WriteNumber (IconSize);

            writer.WriteEndObject ();
        }

        void SaveConfigInternalMisc(JsonTextWriter writer)
        {
            writer.WriteStartObject ();

            writer.WriteKey ("include_mentions");
            writer.WriteBoolean (_mgr.HomeIncludeMentions);

            writer.WriteEndObject ();
        }