parsing an enumeration in JSON.net
According to JSON.NET documentation, default behavior is to use int value for Enums : http://james.newtonking.com/projects/json/help/SerializationGuide.html
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
Documentation: Serialize with JsonConverters
bryan costanich
Updated on June 06, 2022Comments
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bryan costanich about 2 years
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"
i have this enumeration:
/// <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 }
but it throws an error saying "Error converting value "esriGeometryPolygon" to type '...GeometryType'.
what am i missing here?
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?
EDIT: i ported the latest JSON.NET to MT and i'm still getting the exact same error.
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Mose about 10 yearsAlternatively, if you want to avoid coupling between DTO an Json.Net, you can add the converter at serializer level : var serializer = new JsonSerializer(); serializer.Converters.Add(new StringEnumConverter());