如何解析/反序列化JSON的REST服务在C#中返回 [英] How to parse / deserialize JSON returned from rest service in C#
问题描述
我是从一个URL,其结构是这样获得的JSON字符串格式,但我无法解析它。它抛出一个异常,任何想法如何解析呢?
下面是结构:
{
路径:{
病人:{
患者:[
{
patientid:7703176,
名:方丈,芽,
状态:请,
开始:2013年12月7日,
最后一个:N / A,
交往:N / A,
毒:N / A,
坚持:N / A,
命脉:当前,
last_appointment:2013年10月25号,
next_appointment:无
},
{
patientid:5089554,
名:布伦南,邦妮,
状态:已连接,
开始:2013年12月29日,
最后一个:2014年2月1日
交往:低,
药物: ,
坚持:,
命脉:过时,
last_appointment:2013年4月21日,
next_appointment:无
}
]
}
}
}
我这样做是这样的:
公共类PathWayWrapper
{
公共途径途径{获得;组; }
}
和
公共类途径
{
公开名单<患者GT;患者{获得;组; }
}
和
公共类病人
{
众长patientid {获得;组; }
公共字符串名称{;组; }
公共字符串状态{获得;组; }
公共字符串的开始{获得;组; }
公共字符串最后{获得;组; }
公共字符串参与{获得;组; }
公共字符串药物{获得;组; }
公共字符串遵守{获得;组; }
公共字符串命脉{获得;组; }
公共字符串last_appointment {获得;组; }
公共字符串next_appointment {获得;组; }
}
下面是我的分析code:
StreamReader的读者=新的StreamReader(response.GetResponseStream());
JSON字符串= reader.ReadToEnd();
VAR的JSONObject = JsonConvert.DeserializeObject< PathWayWrapper>(JSON);
objPathway = Jsonobject.pathway;
在其中你要反序列化的类是不正确的。你缺少的病人级。
在我的JSON,我试图反序列化它,我喜欢用 http://json2csharp.com 生成首先削减在反序列化类。它比试图手工做的更准确。
VAR的JSONObject = JsonConvert.DeserializeObject< RootObject>(JSON);
公共类病人
{
公共字符串patientid {获得;组; }
公共字符串名称{;组; }
公共字符串状态{获得;组; }
公共字符串的开始{获得;组; }
公共字符串最后{获得;组; }
公共字符串参与{获得;组; }
公共字符串药物{获得;组; }
公共字符串遵守{获得;组; }
公共字符串命脉{获得;组; }
公共字符串last_appointment {获得;组; }
公共字符串next_appointment {获得;组; }
}
公共类患者
{
公开名单<患者GT;患者{获得;组; }
}
公共类路径
{
公立医院病人患者{获得;组; }
}
公共类RootObject
{
公共通路途径{获得;组; }
}
P.S。你得到的异常通常是一个很好的线索,有什么问题你定义的类反序列化的方式。
无法反序列化的当前JSON对象(例如{名:值})入式'System.Collections.Generic.List`1 [ConsoleApplication1.Program +耐心]',因为此类型需要一个JSON阵列(例如: [1,2,3]),以正确的反序列化。
要解决这个错误要么改变的JSON到一个JSON阵列(例如[1,2,3])或更改反序列化的类型,以便它是一个正常的.NET类型(例如,不是一个原始类型类似整数,而不是像一个数组或列表),可以从一个JSON对象反序列化集合类型。 JsonObjectAttribute也可以加入到类型迫使它从JSON对象反序列化
I am getting JSON in string format from a URL whose structure is like this, but I am unable to parse it. It's throwing an exception, any idea how to parse it?
Here is the structure:
{
"pathway":{
"patients":{
"patient":[
{
"patientid":"7703176",
"name":"Abbot, Bud",
"status":"Invited",
"start":"2013-12-07",
"last":"N/A",
"engagement":"N/A",
"drug":"N/A",
"adherence":"N/A",
"vitals":"Current",
"last_appointment":"2013-10-25",
"next_appointment":"None"
},
{
"patientid":"5089554",
"name":"Brennan, Bonnie",
"status":"Connected",
"start":"2013-12-29",
"last":"2014-02-01",
"engagement":"Low",
"drug":" ",
"adherence":" ",
"vitals":"Out of Date",
"last_appointment":"2013-04-21",
"next_appointment":"None"
}
]
}
}
}
i am doing like this:
public class PathWayWrapper
{
public pathway pathway { get; set; }
}
and
public class pathway
{
public List<patient> patients { get; set; }
}
and
public class patient
{
public long patientid { get; set; }
public string name { get; set; }
public string status { get; set; }
public string start { get; set; }
public string last { get; set; }
public string engagement { get; set; }
public string drug { get; set; }
public string adherence { get; set; }
public string vitals { get; set; }
public string last_appointment { get; set; }
public string next_appointment { get; set; }
}
here is my parsing code:
StreamReader reader = new StreamReader(response.GetResponseStream());
string json = reader.ReadToEnd();
var Jsonobject = JsonConvert.DeserializeObject<PathWayWrapper>(json);
objPathway = Jsonobject.pathway;
The classes into which you're deserializing are incorrect. You are missing the "Patients" class.
When I have JSON and am trying to deserialize it I like to use http://json2csharp.com to generate a first cut at the deserialization classes. It's more accurate than trying to do it by hand.
var jsonobject = JsonConvert.DeserializeObject<RootObject>(json);
public class Patient
{
public string patientid { get; set; }
public string name { get; set; }
public string status { get; set; }
public string start { get; set; }
public string last { get; set; }
public string engagement { get; set; }
public string drug { get; set; }
public string adherence { get; set; }
public string vitals { get; set; }
public string last_appointment { get; set; }
public string next_appointment { get; set; }
}
public class Patients
{
public List<Patient> patient { get; set; }
}
public class Pathway
{
public Patients patients { get; set; }
}
public class RootObject
{
public Pathway pathway { get; set; }
}
P.S. The exception you were getting is usually a really good clue that there's something wrong with the way you've defined the deserialization classes.
Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1[ConsoleApplication1.Program+patient]' because the type requires a JSON array (e.g. [1,2,3]) to deserialize correctly.
To fix this error either change the JSON to a JSON array (e.g. [1,2,3]) or change the deserialized type so that it is a normal .NET type (e.g. not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object.
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