无法在Asp.Net核心3.1API中上传文件

<form method="post" enctype="multipart/form-data">
    <input type="file" name="file" />
    <button type="submit">Upload</button>
</form>

[HttpPost("upload")]
public async Task<IActionResult> UploadFile(IFormFile file)
{
    if (file == null || file.Length == 0)
        return Content("No file selected");

    var path = Path.Combine(
                        Directory.GetCurrentDirectory(), "wwwroot",
                               file.FileName);

    using (var stream = new FileStream(path, FileMode.Create))
    {
        await file.CopyToAsync(stream);
    }
    return Ok();
}

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<FormOptions>(options =>
    {
        options.MultipartBodyLengthLimit = int.MaxValue; // 设置最大长度
    });
    services.AddControllers();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }

    app.UseRouting();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
}

{
  "Kestrel": {
    "Endpoints": {
      "Http": {
        "Url": "http://localhost:5000",
        "MaxRequestBodySize": "10485760" // 10MB
      }
    }
  }
}