如何将此JSON反序列化为对象？
我正在尝试使用JSON.Net将JSON对象反序列化为C＃对象。
我想要创建的对象是MonthlyPerformance ，它包含Type列表，其中包含Categories列表，而MonthlyPerformance列表又包含一个Funds列表。 它们被定义为：
public class MonthlyPerformance { public List Types { get; set; } } public class Type { public int Id { get; set; } public string CountryId { get; set; } public string Name { get; set; } public List Categories { get; set; } public Type() { } } public class Category { public int Id { get; set; } public string CountryId { get; set; } public string Name { get; set; } public List Funds { get; set; } public Category() { } } public class Fund { public int Id { get; set; } public string CountryId { get; set; } public string Name { get; set; } public Fund() { } }
我认为以下会这样做，但事实并非如此。 它只是创建一个Type对象的实例，其中包含所有null：
var file = File.ReadAllText(filePath); var types = JsonConvert.DeserializeObject(file);
这是我正在使用的JSON：
{ "MonthlyPerformance": { "Type": [ { "id": "65", "countryId": "IE", "name": "Irish Domestic Funds (Gross)", "Category": [ { "id": "25003334", "countryId": "IE", "name": "UK Equity", "ConfigurationFund": [ { "id": "25000301", "countryId": "IE", "name": "Aviva Irl UK Equity Fund" }, { "id": "25000349", "countryId": "IE", "name": "New Ireland UK Equity 9" } ] }, { "id": "25003339", "countryId": "IE", "name": "Irish Equity", "Fund": [ { "id": "25000279", "countryId": "IE", "name": "Friends First Irish Equity G" }, { "id": "25000305", "countryId": "IE", "name": "Irish Life Celticscope 2 G" } ] } ] }, { "id": "80", "countryId": "IE", "name": "Irish Individual Pensions", "Category": [ { "id": "25003347", "countryId": "IE", "name": "Asia Pacific Ex-Japan Equity", "Fund": [ { "id": "25001789", "countryId": "IE", "name": "Aviva Irl Pacific Basin Eq" }, { "id": "25002260", "countryId": "IE", "name": "Ir Life Pacific Eq Indexed P" } ] }, { "id": "25003365", "countryId": "IE", "name": "Flexible Equity", "Fund": [ { "id": "25003238", "countryId": "IE", "name": "Friends First Protected Equity Plus Fund S2" }, { "id": "25003267", "countryId": "IE", "name": "Friends First Protected Equity Plus Bond G" } ] } ] } ] } }
我需要做些什么才能让它发挥作用？
编辑以包含MonthlyPerformance
我相信问题出在你的Json字符串中。
"Type": [ ... ]
应该
"Types": [ ... ]
Types是应该反序列化的属性的名称，你错误地输入Type类名。
Type类中的Categories属性也是如此。
此外，我只是从Json字符串中删除了"MonthlyPerformance"根，它就像一个魅力。 当然还有Json.NET。
以下是修改后的Json的片段，其中包含适当的属性名称（通知，类型，类别，基金和缺少MonthlyPerformance根）
{ "Types": [ { "id": "65", "countryId": "IE", "name": "Irish Domestic Funds (Gross)", "Categories": [ { "id": "25003334", "countryId": "IE", "name": "UK Equity", "Funds": [ { "id": "25000301", "countryId": "IE", "name": "Aviva Irl UK Equity Fund" }, { "id": "25000349", "countryId": "IE", "name": "New Ireland UK Equity 9" } ] }
您对类的上述代码乍一看看起来是正确的。
我已成功使用以下类（JavaScriptSerializer）反序列化JSON。 用法如下
using System.Web.Script.Serialization; JavaScriptSerializer js = new JavaScriptSerializer(); string file = File.ReadAllText(filePath); MonthyPerformance json = js.Deserialize(file);
哦，并为每个类的类属性添加[Serializable]
[Serializable] class whatever{}
您是否会考虑使用dynamic对象而不是反序列化到对象？ （未声明MonthlyPerformance ， Type ， Category ， Fund ）
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用法：
dynamic jobj = JsonUtils.JsonObject.GetDynamicJsonObject(JsonString); foreach (var item in jobj.MonthlyPerformance.Type) { Console.WriteLine(item.name); foreach (var category in item.Category) { Console.WriteLine("\t" + category.name); if (category.ConfigurationFund != null) { foreach (var fund in category.ConfigurationFund) { Console.WriteLine("\t\t" + fund.name); } } } }
所需的助手类就在这里
您的属性名称与JSON的属性名称不匹配。 我希望序列化失败。
鉴于您发布的JSON，我希望您的c＃类看起来像这样。 我不熟悉JSON.net，但我认为他们有一个属性装饰器，允许你指定c＃prop匹配的JSON属性的名称。
public class MonthlyPerformance { public List Type { get; set; } } public class Type { public int id { get; set; } public string countryId { get; set; } public string Name { get; set; } public List Category { get; set; } public Type() { } } public class Category { public int id { get; set; } public string countryId { get; set; } public string name { get; set; } public List ConfigurationFund{ get; set; } public Category() { } } public class Fund { public int id { get; set; } public string countryId { get; set; } public string name { get; set; } public Fund() { } }
这就是我用于JSON反序列化的内容……
using System.Web.Script.Serialization; namespace blahblah { public partial class AccessTierService : ServiceBase { public static T ia_deserialize_json(string json_string) { try { if ((String.Compare(json_string, null) == 0) || (String.Compare(json_string, "") == 0) || (String.Compare(json_string, String.Empty) == 0)) { return default(T); } JavaScriptSerializer serializer = new JavaScriptSerializer(); return (T)serializer.Deserialize (json_string); } catch (Exception) { return default(T); } } } }
并称之为……
login_request = ia_deserialize_json(body_string);