Serializing XNA Rectangle with Json.NET

Question

I\'m using Json.NET First look at this:

using System.Drawing;
string json = JsonConvert.SerializeObject(new Rectangle(-3,6,32,32), Formatting.Indented);
Con         


        

Answer 1

I figured out a way to get Newtonsoft.Json (Json.Net) to play nice with XNA's Rectangle class. First, your rectangle should be a property of a class so you can give it a JsonConverter attribute:

public class Sprite
{
    [JsonConverter(typeof(MyRectangleConverter))]
    public Rectangle Rectangle;
}

public class MyRectangleConverter : JsonConverter
{
    public override void WriteJson( JsonWriter writer, object value, JsonSerializer serializer )
    {
        var rectangle = (Rectangle)value;

        var x = rectangle.X;
        var y = rectangle.Y;
        var width = rectangle.Width;
        var height = rectangle.Height;

        var o = JObject.FromObject( new { x, y, width, height } );

        o.WriteTo( writer );
    }

    public override object ReadJson( JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer )
    {
        var o = JObject.Load( reader );

        var x = GetTokenValue( o, "x" ) ?? 0;
        var y = GetTokenValue( o, "y" ) ?? 0;
        var width = GetTokenValue( o, "width" ) ?? 0;
        var height = GetTokenValue( o, "height" ) ?? 0;

        return new Rectangle( x, y, width, height );
    }

    public override bool CanConvert( Type objectType )
    {
        throw new NotImplementedException();
    }

    private static int? GetTokenValue( JObject o, string tokenName )
    {
        JToken t;
        return o.TryGetValue( tokenName, StringComparison.InvariantCultureIgnoreCase, out t ) ? (int)t : (int?)null;
    }
}

It could probably be improved so feedback is appreciated.