Jazimov Jazimov - 23 days ago 18
C# Question

Convert List<Property> To JObject

Consider this code:

var joWork = ((JObject) x).Properties()
.Where(p => p.Value.Type == JTokenType.String).ToList();


I end up with a
List<JProperty>
.

Is there a quick way using Linq or a JSON.NET function to convert that
List<JProperty>
object to a JObject without building a JObject from scratch in a loop?

Answer

Yup, you can just pass the list into the JObject constructor, and Json.NET will do the rest. Here's an example:

using System;
using System.Linq;
using Newtonsoft.Json.Linq;

public class Test
{
    static void Main()
    {
        JObject original = JObject.Parse("{ \"x\": \"a\", \"y\": \"b\", \"z\": 1 }");
        var properties = original
            .Properties()
            .Where(p => p.Value.Type == JTokenType.String)
            .ToList();

        var recreated = new JObject(properties);
        Console.WriteLine(recreated);
    }
}

Output:

{
  "x": "a",
  "y": "b"
}

(The z property is missing because its value isn't a string.)

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