Question

这是我第一次进入WCF / JSON。我创建了一个WCF Web服务。这是我的方法之一。这是我将数据序列化为JSON的方式。

   public string GetPrayers()
    {
        DataTable myDt = new DataTable();
        myDt = sprocToDT("LoadPrayers");
        string JSONString = string.Empty;
        JSONString = JsonConvert.SerializeObject(myDt, Formatting.None);
        return JSONString;
    }

这会返回一个不错的JSON数据集：

{“GetPrayersResult”：“[{\”“prayid \”：2，\“祈祷\”：\“请为我祈祷狗生锈。他患有癌症（\”，\ “prayerCategory \”：\ “常规\”，\ “prayerDate \”：\ “2017-06-10T21：24：16.1 \”，\ “处理\”：\ “GuruJee \”，\ “国家\”：\ “美国\”}，{\ “prayerid \”：1，\ “祈祷\”：\“帮助我需要阑尾切除术 STAT \ “\ ”prayerCategory \“：\ ”体育\“，\ ”prayerDate \“：\ ”2017-04-10T20：30：39.77 \“，\ ”处理\“：\ ”GuruJee \“，\”国\ “：\” 美国\ “}]”}

当我去反序列化时，我得到所有空值。这是我创建的类：

 public class PrayUpPrayers
        {
            public string prayer { get; set; }
            public string prayerid { get; set; }
            public string prayerCategory { get; set; }
            public string prayerCategoryID { get; set; }
            public string prayerDate { get; set; }
            public string handle { get; set; }
            public string country { get; set; }  
        }

        public class ThePrayer
        {
        public PrayUpPrayers prayers { get; set; }
        }


    }

这就是我检索JSON的方式：

void getData()
        {
            var request = HttpWebRequest.Create(string.Format(@"URLGoesHere"));
            request.ContentType = "application/json";
            request.Method = "GET";

            using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
            {
                if (response.StatusCode != HttpStatusCode.OK)
                    Console.Out.WriteLine("Error fetching data. Server returned status code: {0}", response.StatusCode);
                using (StreamReader reader = new StreamReader(response.GetResponseStream()))
                {
                    var content = reader.ReadToEnd();
                    string foo = content.ToString();

                    var testing = JsonConvert.DeserializeObject<prayupapp.ModelClasses.PrayUpPrayers>(foo,
               new JsonSerializerSettings
               {
                   NullValueHandling = NullValueHandling.Ignore
               });

测试始终为空？问题是我序列化错误，可能是类结构，还是与我反序列化有关。一个重要的注意事项：我在其中一个JSONClassesFromC＃站点上检查了我的JSON，它只返回GetPrayersResult作为唯一的类项。完全忽略我的整个结构。

Answer 1

您没有提供sprocToDT的代码，但应创建ThePrayer对象，其中应包含PrayUpPrayers的列表

public class ThePrayer
{
    public List<PrayUpPrayers> prayers { get; set; }
}

然后你应该反序列化ThePrayer对象，而不是PrayUpPrayers。

例如

PrayUpPrayers prayUpPrayers1 = new PrayUpPrayers
{
    prayer = "Please pray for my dog Rusty. He has cancer",
    prayerid = "2",
    prayerCategory = "General",
    prayerDate = "2017-06-10T21:24:16.1",
    handle = "GuruJee",
    country = "USA"
};

PrayUpPrayers prayUpPrayers2 = new PrayUpPrayers
{
    prayer = "Help Me I need a appendectomy STAT",
    prayerid = "1",
    prayerCategory = "Sports",
    prayerDate = "2017-04-10T20:30:39.77",
    handle = "GuruJee",
    country = "USA"
};

ThePrayer thePrayer = new ThePrayer
{
    prayers = new List<PrayUpPrayers>
    {
        prayUpPrayers1, prayUpPrayers2
    }
};

代码中的

myDt应与我代码中的thePrayer实例相同。

JSONString = JsonConvert.SerializeObject(myDt, Formatting.None);

将提供类似

的Json

＆＃34; {\＆＃34;祈祷\＆＃34;：[{\＆＃34;祈祷\＆＃34;：\＆＃34;请为我的狗生锈祈祷。他有癌症\＆＃34; \＆＃34; prayerid \＆＃34;：\＆＃34; 2 \＆＃34; \＆＃34; prayerCategory \＆＃34;：\＆＃34;通用\ ＆＃34; \＆＃34; prayerCategoryID \＆＃34;：空，\＆＃34; prayerDate \＆＃34;：\＆＃34; 2017-06-10T21：24：16.1 \＆＃34; ，\＆＃34;处理\＆＃34;：\＆＃34; GuruJee \＆＃34; \＆＃34;国家\＆＃34;：\＆＃34;美国\＆＃34;}， {\＆＃34;祈祷\＆＃34;：\＆＃34;帮助我需要阑尾切除术 STAT \＆＃34; \＆＃34; prayerid \＆＃34;：\＆＃34; 1 \＆＃34; \＆＃34; prayerCategory \＆＃34;：\＆＃34;体育\ ＆＃34; \＆＃34; prayerCategoryID \＆＃34;：空，\＆＃34; prayerDate \＆＃34;：\＆＃34; 2017-04-10T20：30：39.77 \＆＃34; ，\＆＃34;处理\＆＃34;：\＆＃34; GuruJee \＆＃34; \＆＃34;国家\＆＃34;：\＆＃34;美国\＆＃34;}] }＆＃34;

反序列化看起来像

var testing = JsonConvert.DeserializeObject<prayupapp.ModelClasses.ThePrayer>(foo,
    new JsonSerializerSettings
    {
        NullValueHandling = NullValueHandling.Ignore
    });

Answer 2

这很简单。你应该两次输出输出。试试这个：

var output= DeserializeObject<string>(foo);

var testing = JsonConvert.DeserializeObject<prayupapp.ModelClasses.PrayUpPrayers>(output,
               new JsonSerializerSettings
               {
                   NullValueHandling = NullValueHandling.Ignore
               });

JSON不反序列化

2 个答案: