dotnet core System.Text.Json unescape unicode string

Question

Using JsonSerializer.Serialize(obj) will produce an escaped string, but I want the unescaped version. For example:

using System;
using System.Text.Json;

public class Program
{
    public static void Main()
    {
        var a = new A{Name = "你好"};
        var s = JsonSerializer.Serialize(a);
        Console.WriteLine(s);
    }
}

class A {
    public string Name {get; set;}
}

will produce a string {"Name":"\u4F60\u597D"} but I want {"Name":"你好"}

I created a code snippet at https://dotnetfiddle.net/w73vnO
Please help me.

Answer 1

You need to set the JsonSerializer options not to encode those strings.

JsonSerializerOptions jso = new JsonSerializerOptions();
jso.Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping;

Note that using UnsafeRelaxedJsonEscaping comes with security risks such as XSS attacks.

Then you pass this options when you call your Serialize method.

var s = JsonSerializer.Serialize(a, jso);        

Full code:

JsonSerializerOptions jso = new JsonSerializerOptions();
jso.Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping;

var a = new A { Name = "你好" };
var s = JsonSerializer.Serialize(a, jso);        
Console.WriteLine(s);

Result:

If you need to print the result in the console, you may need to install additional language. Please refer here.