鉴于Yahoo API的响应，我试图使用Newtonsoft.Json和ASP.NET / C＃将播放器解析出来。我还想最后检查count的值。
{
"fantasy_content": {
"xml:lang": "en-US",
"yahoo:uri": "/fantasy/v2/game/nfl/players",
"game": [
{
"game_key": "390",
"game_id": "390",
"name": "Football",
"code": "nfl",
"type": "full",
"url": "https://football.fantasysports.yahoo.com/f1",
"season": "2019",
"is_registration_over": 0,
"is_game_over": 0,
"is_offseason": 0
},
{
"players": {
"0": {
"player": [
[
{
"player_key": "390.p.30972"
},
{
"player_id": "30972"
},
{
"name": {
"full": "Saquon Barkley",
"first": "Saquon",
"last": "Barkley",
"ascii_first": "Saquon",
"ascii_last": "Barkley"
}
},
{
"editorial_player_key": "nfl.p.30972"
},
{
"editorial_team_key": "nfl.t.19"
},
{
"editorial_team_full_name": "New York Giants"
},
{
"editorial_team_abbr": "NYG"
},
{
"bye_weeks": {
"week": "11"
}
},
{
"uniform_number": "26"
},
{
"display_position": "RB"
},
{
"headshot": {
"url": "https://s.yimg.com/iu/api/res/1.2/RtPm7fdFHthz1._DrpkAqA--~C/YXBwaWQ9eXNwb3J0cztjaD0yMzM2O2NyPTE7Y3c9MTc5MDtkeD04NTc7ZHk9MDtmaT11bGNyb3A7aD02MDtxPTEwMDt3PTQ2/https://s.yimg.com/xe/i/us/sp/v/nfl_cutout/players_l/09242018/30972.png",
"size": "small"
},
"image_url": "https://s.yimg.com/iu/api/res/1.2/RtPm7fdFHthz1._DrpkAqA--~C/YXBwaWQ9eXNwb3J0cztjaD0yMzM2O2NyPTE7Y3c9MTc5MDtkeD04NTc7ZHk9MDtmaT11bGNyb3A7aD02MDtxPTEwMDt3PTQ2/https://s.yimg.com/xe/i/us/sp/v/nfl_cutout/players_l/09242018/30972.png"
},
{
"is_undroppable": "0"
},
{
"position_type": "O"
},
[],
{
"eligible_positions": [
{
"position": "RB"
}
]
},
[],
[],
[]
]
]
},
"1": {
"player": [
[
{
"player_key": "390.p.29238"
},
{
"player_id": "29238"
},
{
"name": {
"full": "Ezekiel Elliott",
"first": "Ezekiel",
"last": "Elliott",
"ascii_first": "Ezekiel",
"ascii_last": "Elliott"
}
},
{
"editorial_player_key": "nfl.p.29238"
},
{
"editorial_team_key": "nfl.t.6"
},
{
"editorial_team_full_name": "Dallas Cowboys"
},
{
"editorial_team_abbr": "Dal"
},
{
"bye_weeks": {
"week": "8"
}
},
{
"uniform_number": "21"
},
{
"display_position": "RB"
},
{
"headshot": {
"url": "https://s.yimg.com/iu/api/res/1.2/.0ocryeNkGmnFWlYOhT4hw--~C/YXBwaWQ9eXNwb3J0cztjaD0yMzM2O2NyPTE7Y3c9MTc5MDtkeD04NTc7ZHk9MDtmaT11bGNyb3A7aD02MDtxPTEwMDt3PTQ2/https://s.yimg.com/xe/i/us/sp/v/nfl_cutout/players_l/09272018/29238.png",
"size": "small"
},
"image_url": "https://s.yimg.com/iu/api/res/1.2/.0ocryeNkGmnFWlYOhT4hw--~C/YXBwaWQ9eXNwb3J0cztjaD0yMzM2O2NyPTE7Y3c9MTc5MDtkeD04NTc7ZHk9MDtmaT11bGNyb3A7aD02MDtxPTEwMDt3PTQ2/https://s.yimg.com/xe/i/us/sp/v/nfl_cutout/players_l/09272018/29238.png"
},
{
"is_undroppable": "0"
},
{
"position_type": "O"
},
[],
{
"eligible_positions": [
{
"position": "RB"
}
]
},
[],
[],
[]
]
]
},
"2": {
"player": [
[
{
"player_key": "390.p.30180"
},
{
"player_id": "30180"
},
{
"name": {
"full": "Alvin Kamara",
"first": "Alvin",
"last": "Kamara",
"ascii_first": "Alvin",
"ascii_last": "Kamara"
}
},
{
"editorial_player_key": "nfl.p.30180"
},
{
"editorial_team_key": "nfl.t.18"
},
{
"editorial_team_full_name": "New Orleans Saints"
},
{
"editorial_team_abbr": "NO"
},
{
"bye_weeks": {
"week": "9"
}
},
{
"uniform_number": "41"
},
{
"display_position": "RB"
},
{
"headshot": {
"url": "https://s.yimg.com/iu/api/res/1.2/loANJKjPdmUu1gM1jyKK1A--~C/YXBwaWQ9eXNwb3J0cztjaD0yMzM2O2NyPTE7Y3c9MTc5MDtkeD04NTc7ZHk9MDtmaT11bGNyb3A7aD02MDtxPTEwMDt3PTQ2/https://s.yimg.com/xe/i/us/sp/v/nfl_cutout/players_l/08252018/30180.png",
"size": "small"
},
"image_url": "https://s.yimg.com/iu/api/res/1.2/loANJKjPdmUu1gM1jyKK1A--~C/YXBwaWQ9eXNwb3J0cztjaD0yMzM2O2NyPTE7Y3c9MTc5MDtkeD04NTc7ZHk9MDtmaT11bGNyb3A7aD02MDtxPTEwMDt3PTQ2/https://s.yimg.com/xe/i/us/sp/v/nfl_cutout/players_l/08252018/30180.png"
},
{
"is_undroppable": "0"
},
{
"position_type": "O"
},
[],
{
"eligible_positions": [
{
"position": "RB"
}
]
},
[],
[],
[]
]
]
},
"count": 3
}
}
],
"time": "181.84494972229ms",
"copyright": "Data provided by Yahoo! and STATS, LLC",
"refresh_rate": "60"
}
}
有两件事让我失望。
game是一个看起来很奇怪的数组，并且每个玩家前面都有一个索引，例如
0: { player: { //dah dah dah }
如果索引不存在，我可能会使用类似的方法找出它：
var jObject = JObject.Parse(await response.Content.ReadAsStringAsync());
if (jObject.ContainsKey("players"))
{
var yPs = jObject["players"].ToObject<YahooPlayerListJson>();
yPlayerList.AddRange(yPs.YPlayers);
if(yPs.Count < 25) { f = 5000; }
}
但是索引给我带来了困难。如何解析此JSON？
答案 0 :(得分：2)
U，这是一种非常糟糕的JSON格式。异构数组使使用它特别困难。在我看来，这些数据是从XML转换而来的（非常糟糕）。如果是这样，直接使用XML可能会更直接。无论如何，我们都可以使它工作。这就是我要采取的方法。
制作一些类来捕获您感兴趣的播放器数据：
public class Player
{
public string PlayerKey { get; set; }
public string PlayerId { get; set; }
public Name Name { get; set; }
public string EditorialPlayerKey { get; set; }
public string EditorialTeamKey { get; set; }
public string EditorialTeamFullName { get; set; }
public string EditorialTeamAbbr { get; set; }
public Week ByeWeeks { get; set; }
public string UniformNumber { get; set; }
public string DisplayPosition { get; set; }
public Photo Headshot { get; set; }
public string ImageUrl { get; set; }
public string IsUndroppable { get; set; }
public string PositionType { get; set; }
public Position[] EligiblePositions { get; set; }
}
public class Name
{
public string Full { get; set; }
public string First { get; set; }
public string Last { get; set; }
}
public class Photo
{
public string Url { get; set; }
public string Size { get; set; }
}
public class Week
{
[JsonProperty("week")]
public int Number { get; set; }
}
public class Position
{
[JsonProperty("position")]
public string Name { get; set; }
}
设置配置有SnakeCaseNamingStrategy的串行器。这将处理JSON中的snake_case属性名称到C＃类中的ProperCase属性名称的转换。
JsonSerializer serializer = new JsonSerializer
{
ContractResolver = new DefaultContractResolver
{
NamingStrategy = new SnakeCaseNamingStrategy()
}
};
将JSON解析为JObject。
string json = await response.Content.ReadAsStringAsync();
JObject root = JObject.Parse(json);
从那里使用LINQ-to-JSON查询来填充Players的列表，如下所示。
在这里，我将SelectTokens()与递归下降JsonPath表达式一起使用，作为向下钻取player对象的快捷方式。 JSON中的每个播放器实际上是一个包含混合内容数组的数组，其中内容由一些对象（每个对象包含一个不同的属性）和一些无用的空数组组成。因此，我将内部数组过滤为仅包含真实数据的对象，然后使用SelectMany()将其所有属性收集到平面Enumerable<JProperty>中，并将其放置到临时JObject中。从那里，我将ToObject()与先前配置的序列化程序一起使用，以从Player创建一个新的JObject实例并返回Player以便将其放入结果列表。 / p>
List<Player> players =
root.SelectTokens("$..player")
.Select(jt =>
{
JObject tempObj = new JObject(
jt.Children<JArray>()
.First()
.Children<JObject>()
.SelectMany(jo => jo.Properties())
);
return tempObj.ToObject<Player>(serializer);
})
.ToList();
如果您想从JSON中获取count并将其与检索到的玩家的实际数量进行比较，则可以这样做：
int playerCount = (int)root.SelectToken("$..players.count");
if (players.Count != playerCount)
throw new Exception("The number of players in the list does not match the player count!");
这是一个有效的演示：https://dotnetfiddle.net/8KYNNn