Backend-Api/ServiceHost/MiddleWare/ApiJsonEnumFilter.cs

using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.AspNetCore.Mvc;
using System.Text.Json.Serialization;
using System.Text.Json;

namespace ServiceHost.MiddleWare;

public class ApiJsonEnumFilter : IActionFilter
{
    public void OnActionExecuting(ActionExecutingContext context)
    {
        // قبل از اکشن نیازی نیست کاری کنیم
    }

    public void OnActionExecuted(ActionExecutedContext context)
    {
        if (context.Result is ObjectResult objectResult)
        {
            var enumConverter = new JsonStringEnumConverter();
            var options = new JsonSerializerOptions(JsonSerializerDefaults.Web);
            options.Converters.Add(enumConverter);
            var json = JsonSerializer.Serialize(objectResult.Value, options);
            context.Result = new ContentResult
            {
                Content = json,
                ContentType = "application/json",
                StatusCode = objectResult.StatusCode
            };
        }
    }
}