如何使用Newtonsoft.Json包在C#(4.0)中解析我的json字符串？

Question

我是JSON的新手.在我的asp.net应用程序中,我想解析json字符串.所以,我使用了Newtonsoft.Json包来读取和写入json数据.现在,我能够解析简单的json数据.但是现在我收到了一些复杂的json数据用于解析.所以,我有点打击它.

这是JSON数据:

{
    quizlist: [
     {
            QUIZ: {
                'QPROP': [
                    {
                        'name': 'FB',
                        'intro': '',
                        'timeopen': '1347871440',
                        'timeclose': '1355733840',
                        'timelimit': '0',
                        'noofques': '5',
                        'QUESTION': {
                            'QUEPROP': [
                                {
                                    'questiontext': 'Scienceisbasedont',
                                    'penalty': '0.3333333',
                                    'qtype': 'shortanswer',
                                    'answer': 'cause-and-effect',
                                    'mark'  : '5',
                                    'hint': ''
                                },
                                {
                                    'questiontext': 'otherscientistsevaluateit',
                                    'penalty': '0.3333333',
                                    'qtype': 'shortanswer',
                                    'answer': 'Peerreview',
                                    'mark'  : '5',
                                    'hint': ''
                                },
                                {
                                    'questiontext': 'Watchingavariety',
                                    'penalty': '0.3333333',
                                    'qtype': 'shortanswer',
                                    'answer': 'inductive',
                                    'mark'  : '5',
                                    'hint': ''
                                },
                                {
                                    'questiontext': 'coveriesorideas',
                                    'penalty': '0.3333333',
                                    'qtype': 'shortanswer',
                                    'answer': 'paradigmshift',
                                    'mark'  : '5',
                                    'hint': ''
                                },
                                {
                                    'questiontext': 'proportions',
                                    'penalty': '0.3333333',
                                    'qtype': 'shortanswer',
                                    'answer': 'fixed',
                                    'mark'  : '5',
                                    'hint': ''
                                }
                            ]
                        }
                    }
                ]
            }
        }
     ]
}

这是我的C#代码:

dynamic dynObj = JsonConvert.DeserializeObject(jsonString);

            foreach (var data in dynObj.quizlist)
            {
                foreach (var data1 in data.QUIZ.QPROP)
                {
                    Response.Write("Name" + ":" + data1.name + "<br>");
                    Response.Write("Intro" + ":" + data1.intro + "<br>");
                    Response.Write("Timeopen" + ":" + data1.timeopen + "<br>");
                    Response.Write("Timeclose" + ":" + data1.timeclose + "<br>");
                    Response.Write("Timelimit" + ":" + data1.timelimit + "<br>");
                    Response.Write("Noofques" + ":" + data1.noofques + "<br>");
                }
              }

我能够在QPROP数组对象中解析直到noofques对象.现在必须解析data.QUIZ.QPROP.QUESTION.QUEPROP数组对象...

但是我没能完全解析......

请指导我摆脱这个问题......

Answer 1

foreach (var data in dynObj.quizlist)
{
    foreach (var data1 in data.QUIZ.QPROP)
    {
        Response.Write("Name" + ":" + data1.name + "<br>");
        Response.Write("Intro" + ":" + data1.intro + "<br>");
        Response.Write("Timeopen" + ":" + data1.timeopen + "<br>");
        Response.Write("Timeclose" + ":" + data1.timeclose + "<br>");
        Response.Write("Timelimit" + ":" + data1.timelimit + "<br>");
        Response.Write("Noofques" + ":" + data1.noofques + "<br>");

        foreach (var queprop in data1.QUESTION.QUEPROP)
        {
            Response.Write("Questiontext" + ":" + queprop.questiontext  + "<br>");
            Response.Write("Mark" + ":" + queprop.mark  + "<br>");
        }
    }
}

Answer 2

您可以使用此工具创建适当的c#类:

http://jsonclassgenerator.codeplex.com/

当你创建类时,你可以简单地将字符串转换为对象:

    public static T ParseJsonObject<T>(string json) where T : class, new()
    {
        JObject jobject = JObject.Parse(json);
        return JsonConvert.DeserializeObject<T>(jobject.ToString());
    }

这些类:http://ge.tt/2KGtbPT/v/0？c

只需修复名称空间.

问候

Answer 3

您可以创建自己的Quiz类型类,然后使用强类型反序列化:

例:

quizresult = JsonConvert.DeserializeObject<Quiz>(args.Message,
                 new JsonSerializerSettings
                 {
                     Error = delegate(object sender1, ErrorEventArgs args1)
                     {
                         errors.Add(args1.ErrorContext.Error.Message);
                         args1.ErrorContext.Handled = true;
                     }
                 });

您还可以应用架构验证.

http://james.newtonking.com/projects/json/help/index.html