Dynamically remove property from JSON using System.Text.Json

Question

Note 1 : I do NOT want to use newtonsoft.json !

Note 2 : This is not a duplicate, other answers use newtonsoft.json !

Note 3 : using .Net 5.

How do I remove a property from a Json string with System.Text.Json ?

{
 Name: "Mike",
 Age : 12,
 Location : "Africa"
}

I want to be able to remove based on both property name and value. For example remove Age property or remove persons with the name Mike.

Why do you have "using Json.Net" in the title if you want to use System.Text.Json? — Guru Stron
– Guru Stron, Commented Apr 24, 2022 at 7:45
"How do I remove a property from a Json string with System.Text.Json ?" - by updating to .NET 6 and using new JsonNode API — Guru Stron
– Guru Stron, Commented Apr 24, 2022 at 7:47
You can make those additional properties go into an extension data property, without losing on roundtrip, see learn.microsoft.com/en-us/dotnet/standard/serialization/… — Anand Sowmithiran
– Anand Sowmithiran, Commented Apr 24, 2022 at 11:09
You could store it as a Dictionary<string, object> then simply remove the Age key — Charlieface
– Charlieface, Commented Apr 24, 2022 at 11:34

James Risner · Accepted Answer · 2023-02-02 13:31:48Z

6

I hope the below solution might help to remove the property.
emp is your object

var jsonObject = System.Text.Json.Nodes.JsonNode.Parse(emp.ToJson()).AsObject();

Remove the property
Age is the property of emp

jsonObject.Remove(nameof(emp.Age));

James Risner

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answered Feb 2, 2023 at 13:23

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