问无法将“MyAPI.Api.Middleware.MyFilter”类型的对象强制转换为MyAPI.Api.Middleware.MyFilter类型

EN

public class MyFilter: IActionResult
    {
        ApiResponse _response = new ApiResponse();
        public async Task ExecuteResultAsync(ActionContext context)
        {
            
            var httpResponse = context.HttpContext.Response;
            if (httpResponse != null)
            {
                if (httpResponse.StatusCode == 200)
                {
                   
                    if (context.Result.GetType().Equals(typeof(Microsoft.AspNetCore.Mvc.ObjectResult)))
                    {
                        _response.Response = ((Microsoft.AspNetCore.Mvc.ObjectResult)context.Result).Value;
                        _response.Errors = null;
                        _response.IsSuccess = true;
                    }

                }
            }

            return ;
        }
    }

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddSingleton<MyFilter>();
builder.Services.AddAppServices();
builder.Services.AddControllers();
builder.Services.AddDataContext(builder.Configuration);
builder.Services.AddRepositories();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

app.UseSwagger();
app.UseSwaggerUI();
app.UseRouting();
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();

[Route("api/[controller]")]
    [ApiController]
    [ServiceFilter(typeof(MyFilter))]
    public class MyController : ControllerBase
    {
    }