解析在JSON.net枚举 [英] parsing an enumeration in JSON.net

问题描述

我使用JSON.net（也许v3.5ish？从华侨城，2010年）。我试图反序列化一些JSON到一个枚举：

i'm using JSON.net (maybe v3.5ish? it's from oct. 2010). and i'm trying to deserialize some json into an enumeration:

geometryType：esriGeometryPolygon

geometryType: "esriGeometryPolygon"

我有此枚举：

/// <summary>
/// The geometry type.
/// </summary>
[DataContract]
public enum GeometryType
{
    /// <summary>
    /// Refers to geometry type Envelope
    /// </summary>
    [EnumMember(Value = "esriGeometryEnvelope")]
    Envelope,
    /// <summary>
    /// Refers to geometry type MultiPoint
    /// </summary>
    [EnumMember(Value = "esriGeometryMultipoint")]
    MultiPoint,
    /// <summary>
    /// Refers to geometry type MapPoint
    /// </summary>
    [EnumMember(Value = "esriGeometryPoint")]
    Point,
    /// <summary>
    /// Refers to geometry type Polygon
    /// </summary>
    [EnumMember(Value = "esriGeometryPolygon")]
    Polygon,
    /// <summary>
    /// Refers to geometry type Polyline
    /// </summary>
    [EnumMember(Value = "esriGeometryPolyline")]
    Polyline
}

但它抛出一个错误说错误转换值esriGeometryPolygon键入...... GeometryType。

but it throws an error saying "Error converting value "esriGeometryPolygon" to type '...GeometryType'.

我缺少的是在这里吗？

是它，因为它是一个老版本（我使用MonoTouch的端口：的https：/这已不是一年更新）？还是我让我的错datacontract /github.com/chrisntr/Newtonsoft.Json？

is it because it's an old version (i'm using the monotouch port: https://github.com/chrisntr/Newtonsoft.Json which hasn't been updated in a year)? or did i get my datacontract wrong?

编辑：我移植的最新JSON.NET到MT，我仍然得到确切的同样的错误。

i ported the latest JSON.NET to MT and i'm still getting the exact same error.

推荐答案

据JSON.NET文档，默认行为是使用枚举int值：的 http://james.newtonking.com/projects/json/help/SerializationGuide.html

According to JSON.NET documentation, default behavior is to use int value for Enums : http://james.newtonking.com/projects/json/help/SerializationGuide.html

您可以通过添加JsonConverter改变你用枚举属性StringEnumConverter ...

You can change that by adding a JsonConverter attribute with StringEnumConverter on your enum...

/// <summary>
/// The geometry type.
/// </summary>
[DataContract]
[JsonConverter(typeof(StringEnumConverter))]
public enum GeometryType

文档： 与JsonConverters序列化

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