asp.net core webapi 写一个可以上传图片的接口，并把图片转成base64

asp.net core webapi 写一个可以上传图片的接口，并把图片转成base64

using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using System;
using System.IO;
using System.Threading.Tasks;

namespace YourNamespace.Controllers
{
    [ApiController]
    [Route("api/images")]
    public class ImageController : ControllerBase
    {
        private readonly IWebHostEnvironment _hostingEnvironment;

        public ImageController(IWebHostEnvironment hostingEnvironment)
        {
            _hostingEnvironment = hostingEnvironment;
        }

        [HttpPost("upload")]
        public async Task<IActionResult> UploadImage(IFormFile file)
        {
            if (file == null || file.Length == 0)
            {
                return BadRequest("Invalid file");
            }

            try
            {
                var base64String = await ConvertToBase64Async(file);
                return Ok(new { Base64String = base64String });
            }
            catch (Exception ex)
            {
                return StatusCode(StatusCodes.Status500InternalServerError, $"Internal server error: {ex.Message}");
            }
        }

        private async Task<string> ConvertToBase64Async(IFormFile file)
        {
            using (var memoryStream = new MemoryStream())
            {
                await file.CopyToAsync(memoryStream);
                var bytes = memoryStream.ToArray();
                return Convert.ToBase64String(bytes);
            }
        }
    }
}