无法将“Newtonsoft.Json.Linq.JArray”类型的对象转换为“System.Collections.Generic.List”类型
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【中文标题】无法将“Newtonsoft.Json.Linq.JArray”类型的对象转换为“System.Collections.Generic.List”类型【英文标题】：Unable to cast object of type 'Newtonsoft.Json.Linq.JArray' to type 'System.Collections.Generic.List` 【发布时间】：2016-02-10 01:27:00 【问题描述】：我正在从网络服务读取数据。 json 对象如下所示：
var goldString = [
"date":"20151109",
"day":30,
"month":"November",
"year":2015,
"club":9,
"clubName":"Flamingo",
"itw":"XYD",
"races":
"1":
"race":1,
"time":"12:20",
"raceStatus":"Undecided",
"reference":91,
"name":"WELCOME TO FLAMINGO PARK MAIDEN PLATE",
"description":"For Maidens",
"distance":1000,
"stake":"R46,000",
"stakes":"1st: R28,750 | 2nd: R9,200 | 3rd: R4,600 | 4th: R2,300 | 5th: R1,150",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"MDNM",
"group":"G",
"class":"MAIDEN PLATE",
"condition":"For Maidens",
"handicap":false,
"minWins":0,
"maxWins":0,
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"n\/a",
"runners":[
]
,
"2":
"race":2,
"time":"12:50",
"raceStatus":"Undecided",
"reference":92,
"name":"RACING. IT'S A RUSH PINNACLE STAKES",
"description":"Open",
"distance":1800,
"stake":"R66,000",
"stakes":"1st: R41,250 | 2nd: R13,200 | 3rd: R6,600 | 4th: R3,300 | 5th: R1,650",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"PINN",
"group":"A",
"class":"PINNACLE STAKES",
"condition":"Open",
"handicap":false,
"minWins":"n\/a",
"maxWins":"n\/a",
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"n\/a",
"runners":[
]
,
"3":
"race":3,
"time":"13:20",
"raceStatus":"Undecided",
"reference":93,
"name":"INTERNATIONAL JOCKEYS' CHALLENGE 14 NOVEMBER MAIDEN PLATE",
"description":"For Maidens",
"distance":1800,
"stake":"R46,000",
"stakes":"1st: R28,750 | 2nd: R9,200 | 3rd: R4,600 | 4th: R2,300 | 5th: R1,150",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"MDNM",
"group":"G",
"class":"MAIDEN PLATE",
"condition":"For Maidens",
"handicap":false,
"minWins":0,
"maxWins":0,
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"n\/a",
"runners":[
]
,
"4":
"race":4,
"time":"13:50",
"raceStatus":"Undecided",
"reference":94,
"name":"SOCCER 6 MR 65 HANDICAP",
"description":"Open",
"distance":1600,
"stake":"R43,000",
"stakes":"1st: R26,875 | 2nd: R8,600 | 3rd: R4,300 | 4th: R2,150 | 5th: R1,075",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"MR65",
"group":"E",
"class":"MR 65 HANDICAP",
"condition":"Open",
"handicap":true,
"minWins":"n\/a",
"maxWins":"n\/a",
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"n\/a",
"runners":[
]
,
"5":
"race":5,
"time":"14:20",
"raceStatus":"Undecided",
"reference":95,
"name":"COMPUTAFORM EXPRESS MR 72 HANDICAP",
"description":"Open",
"distance":1400,
"stake":"R46,000",
"stakes":"1st: R28,750 | 2nd: R9,200 | 3rd: R4,600 | 4th: R2,300 | 5th: R1,150",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"MR72",
"group":"D",
"class":"MR 72 HANDICAP",
"condition":"Open",
"handicap":true,
"minWins":"n\/a",
"maxWins":"n\/a",
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"n\/a",
"runners":[
]
,
"6":
"race":6,
"time":"14:55",
"raceStatus":"Undecided",
"reference":96,
"name":"RACING ASSOCIATION FM 67 HANDICAP (F & M)",
"description":"For Fillies and Mares",
"distance":1400,
"stake":"R46,000",
"stakes":"1st: R28,750 | 2nd: R9,200 | 3rd: R4,600 | 4th: R2,300 | 5th: R1,150",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"FM67",
"group":"E",
"class":"FM 67 HANDICAP (F & M)",
"condition":"For Fillies and Mares",
"handicap":true,
"minWins":"n\/a",
"maxWins":"n\/a",
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"female",
"runners":[
]
,
"7":
"race":7,
"time":"15:25",
"raceStatus":"Undecided",
"reference":97,
"name":"SOCCER GG MR 66 HANDICAP",
"description":"Open",
"distance":1200,
"stake":"R43,000",
"stakes":"1st: R26,875 | 2nd: R8,600 | 3rd: R4,300 | 4th: R2,150 | 5th: R1,075",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"MR66",
"group":"E",
"class":"MR 66 HANDICAP",
"condition":"Open",
"handicap":true,
"minWins":"n\/a",
"maxWins":"n\/a",
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"n\/a",
"runners":[
]
,
"8":
"race":8,
"time":"15:55",
"raceStatus":"Undecided",
"reference":98,
"name":"BOOK A TABLE 011 6811702 MR 84 HANDICAP",
"description":"Open",
"distance":1000,
"stake":"R55,000",
"stakes":"1st: R34,375 | 2nd: R11,000 | 3rd: R5,500 | 4th: R2,750 | 5th: R1,375",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"MR84",
"group":"C",
"class":"MR 84 HANDICAP",
"condition":"Open",
"handicap":true,
"minWins":"n\/a",
"maxWins":"n\/a",
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"n\/a",
"runners":[
]
,
"9":
"race":9,
"time":"16:30",
"raceStatus":"Undecided",
"reference":99,
"name":"NEXT FLAMINGO PARK RACE MEETING IS MONDAY 16 NOV FM 60 HANDICAP (F & M)",
"description":"For Fillies and Mares",
"distance":1000,
"stake":"R43,000",
"stakes":"1st: R26,875 | 2nd: R8,600 | 3rd: R4,300 | 4th: R2,150 | 5th: R1,075",
"surface":"Sand",
"going":"\u0000",
"goingDescription":"",
"grade":0,
"division":"FM60",
"group":"F",
"class":"FM 60 HANDICAP (F & M)",
"condition":"For Fillies and Mares",
"handicap":true,
"minWins":"n\/a",
"maxWins":"n\/a",
"minAge":"n\/a",
"maxAge":"n\/a",
"gender":"female",
"runners":[
]
]
public RunOns DeserializeAccountRunOns(string json) var myClass = new javascriptSerializer().Deserialize(json); 返回（RunOns）myClass；
公共类 RunOns 公共 PubRunOns runons 得到；放;
public class PubRunOns
public string date get; set;
public int day get; set;
public string month get; set;
public int year get; set;
public int club get; set;
public string clubName get; set;
public string itw get; set;
public Array races get; set;
public static PubRunOns CreateFromData(string[] data)
return new PubRunOns
date = data[0],
day = Convert.ToInt32(data[1]),
month = data[2],
year = Convert.ToInt32(data[3]),
club = Convert.ToInt32(data[4]),
clubName = data[5],
itw = data[6],
races = data[7].ToCharArray()
;
public class Races
public int race get; set;
public string time get; set;
public string raceStatus get; set;
public int reference get; set;
public string name get; set;
public string description get; set;
public int distance get; set;
public string stake get; set;
public string stakes get; set;
public string going get; set;
public List<Runner> Runners get; set;
public class Runner
public int draw get; set;
public int saddle get; set;
public string Name get; set;
public string sex get; set;
public string colour get; set;
public int age get; set;
如果我调用函数：
var test= DeserializeAccountRunOns(goldString);
我得到一个例外：
无法将类型为“System.Object[]”的对象转换为类型“MyProject.Class”
有任何想法吗？提前谢谢你。
【问题讨论】：
您的 JSON 是一个列表（数组）而不是对象，所以首先问题是您将一个 JSON 列表（数组）转换为一个类对象。 @ParthTrivedi 如果我将其更改为 RunOns myClass = new JavaScriptSerializer().DeserializeJArray jsonResponse = JArray.Parse(goldString);
foreach (var item in jsonResponse)
JObject jRaces = (JObject)item["races"];
foreach (var rItem in jRaces)
string rItemKey = rItem.Key;
JObject rItemValueJson = (JObject)rItem.Value;
Races rowsResult = Newtonsoft.Json.JsonConvert.DeserializeObject<Races>(rItemValueJson.ToString());
【讨论】：
太棒了！它工作正常，如果它是一个 json 对象，谢谢！【参考方案2】：可以试试：
JArray jsonResponse = JArray.Parse(goldString);
foreach (var item in jsonResponse)
foreach (var rItem in jRaces)
string rItemKey = rItem.Key;
JObject rItemValueJson = (JObject)rItem.Value;
Races rowsResult = item.Value<JObject>("races").ToObject<Races>();
【讨论】：
【参考方案3】：把想要的类型放入
selectedVals = JsonConvert.DeserializeObject<int[]>(cInDb.PropValue);
而不是强制转换...
【讨论】：
这为我解决了。谢谢阿德尔。以上是关于无法将“Newtonsoft.Json.Linq.JArray”类型的对象转换为“System.Collections.Generic.List”类型的主要内容，如果未能解决你的问题，请参考以下文章
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