【发布时间】：2017-06-14 13:18:10
【问题描述】：
在我的 Xamarin 表单项目中，我解析从文件加载的 JSON 数据。 无论如何，JSON 数据是 1000% 有效的，因为我可以在其他地方解析它，并且它已经被原生 Android 应用程序 (Java) 和 PHP 使用，没有任何问题，但不知何故 Xamarin 无法理解它，它给了我这个错误：
未处理的异常：
Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: {. Path 'category', line 1, position 26.
现在这是我的 JSON 数据：
{"response":1,"category":{"2":{"n":"V\u00e9hicules","d":"C-Vehicules","i":"icon-car","l":{"3":{"n":"Voitures","d":"Voitures"},"4":{"n":"Motos","d":"Motos"},"6":{"n":"Nautisme","d":"Nautisme"},"7":{"n":"\u00c9quipement Auto","d":"Equipement-Auto"},"8":{"n":"\u00c9quipement Moto","d":"Equipement-Moto"},"10":{"n":"Equipement Nautisme","d":"Equipement-Nautisme"}}},"3":{"n":"Immobilier","d":"C-Immobilier","i":"icon-office","l":{"15":{"n":"Ventes immobili\u00e8res","d":"Ventes-immobilieres"},"16":{"n":"Locations","d":"Locations"},"17":{"n":"Bureaux - Commerces","d":"Bureaux-Commerces"}}},"1":{"n":"Emploi","d":"C-Emploi","i":"icon-bag","l":{"1":{"n":"Offres d'emploi","d":"Offres-d--emploi"}}},"9":{"n":"Services","d":"C-Services","i":"icon-service","l":{"18":{"n":"Prestations de services","d":"Prestations-de-services"},"19":{"n":"Cours particuliers","d":"Cours-particuliers"}}},"4":{"n":"Vacances","d":"C-Vacances","i":"icon-plane","l":{"20":{"n":"Locations de vacances","d":"Locations-de-vacances"},"21":{"n":"Chambres d'h\u00f4tes","d":"Chambres-d--hotes"},"22":{"n":"Campings","d":"Campings"}}},"7":{"n":"Loisirs","d":"C-Loisirs","i":"icon-music","l":{"24":{"n":"CD Musique","d":"CD-Musique"},"23":{"n":"DVD Films","d":"DVD-Films"},"27":{"n":"Jeux - Jouets","d":"Jeux-Jouets"},"25":{"n":"Livres","d":"Livres"},"26":{"n":"Sports","d":"Sports"}}},"5":{"n":"Maison","d":"C-Maison","i":"icon-house","l":{"36":{"n":"Accessoires","d":"Accessoires"},"28":{"n":"Ameublement","d":"Ameublement"},"30":{"n":"Arts de la table","d":"Arts-de-la-table"},"38":{"n":"B\u00e9b\u00e9","d":"Bebe"},"37":{"n":"Bijoux - Montres","d":"Bijoux-Montres"},"33":{"n":"Bricolage","d":"Bricolage"},"35":{"n":"Chaussures","d":"Chaussures"},"31":{"n":"D\u00e9coration","d":"Decoration"},"29":{"n":"Electrom\u00e9nager","d":"Electromenager"},"32":{"n":"Linge de maison","d":"Linge-de-maison"},"34":{"n":"V\u00eatements","d":"Vetements"}}},"6":{"n":"Multim\u00e9dia","d":"C-Multimedia","i":"icon-phone","l":{"40":{"n":"Consoles - Jeux vid\u00e9o","d":"Consoles-Jeux-video"},"41":{"n":"Image - Son","d":"Image-Son"},"39":{"n":"Informatique","d":"Informatique"},"42":{"n":"T\u00e9l\u00e9phonie","d":"Telephonie"}}},"8":{"n":"Mat\u00e9riel professionnel","d":"C-Materiel-professionnel","i":"icon-tool","l":{"47":{"n":"Equipements","d":"Equipements"},"43":{"n":"Mat\u00e9riel agricole","d":"Materiel-agricole"},"45":{"n":"Mat\u00e9riel BTP","d":"Materiel-BTP"},"46":{"n":"Outillage","d":"Outillage"},"48":{"n":"Restauration - caf\u00e9","d":"Restauration-cafe"},"44":{"n":"Transport","d":"Transport"}}}}}
这是发生异常的那一行：
var general = JsonConvert.DeserializeObject<GeneralConfig>(config);
更新：
我没有放置完整的 JSON 文件，我在上面的示例中通过删除类别旁边的其他对象来简化它，我简化它的原因是因为 SO 不会让放置整个 JSON 内容和错误消息清楚地表明问题出在此处：
"category":{"2":{"n":"V\u00e9hicules",
更新：
这是读取 JSON 的代码：
namespace HelloWorldApp
{
class Config
{
string config = "";
public Config()
{
var assembly = typeof(MainPage).GetTypeInfo().Assembly;
//Stream stream = assembly.GetManifestResourceStream("HelloWorldApp.Resources.configs.json");
string[] resources = Assembly.GetExecutingAssembly().GetManifestResourceNames();
foreach (string resource in resources)
{
if (resource.EndsWith(".json"))
{
Stream stream = assembly.GetManifestResourceStream(resource);
if (stream != null)
{
using (var reader = new System.IO.StreamReader(stream))
{
config = reader.ReadToEnd();
}
}
}
}
}
public void getCategory(int id)
{
var general = JsonConvert.DeserializeObject<GeneralConfig>(config);
var category = general.category;
var cats = JsonConvert.DeserializeObject<List<CategoryConfig>>(config);
foreach (var item in cats)
{
Console.WriteLine("Cat: " + item.n);
}
}
这是常规配置：
class GeneralConfig
{
public string category { get; set; }
public int city { get; set; }
public string brand { get; set; }
public int model { get; set; }
}
错误 2：
Newtonsoft.Json.JsonSerializationException: Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'HelloWorldApp.CategoryConfig' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.
要修复此错误，请将 JSON 更改为 JSON 对象（例如 {"name":"value"}）或将反序列化类型更改为数组或实现集合接口的类型（例如 ICollection、IList），例如可以从 JSON 数组反序列化的列表。 JsonArrayAttribute 也可以添加到类型中以强制它从 JSON 数组中反序列化。 路径“类别”，第 1 行，位置 26。
【问题讨论】：
-
我用的是：jsoneditoronline.org，同样的 JSON 在 Java 中被完美解析，我不认为 C# 有它自己的 JSON 规则，或者是这样吗？
-
@GeraldVersluis 奇怪，JSONLint 和 Curious Concept 说它有效。
-
json2csharp 说不
-
可以，而且没有什么不同的规则。 JSON 错误意味着 string 有问题。至少，这个字符串包含不应该存在的转义序列。没有理由在 Unicode 字符串 中使用转义序列
-
@PanagiotisKanavos JSON 文本中没有转义序列，\u00e 是法语字母 é 的 unicode 翻译
标签： c# json xamarin xamarin.forms