如何将文件上传到ASP.NET核心控制器？

[HttpPost]
public IActionResult UploadFile(IFormFile file)
{
    // 处理上传的文件
    return Ok();
}

<form method="post" action="/ControllerName/UploadFile" enctype="multipart/form-data">
    <input type="file" name="file" />
    <input type="submit" value="上传" />
</form>

[HttpPost]
public IActionResult UploadFile(IFormFile file, [FromServices] IWebHostEnvironment hostingEnvironment)
{
    if (file != null && file.Length > 0)
    {
        string uploadsFolder = Path.Combine(hostingEnvironment.WebRootPath, "uploads");
        string uniqueFileName = Guid.NewGuid().ToString() + "_" + file.FileName;
        string filePath = Path.Combine(uploadsFolder, uniqueFileName);

        using (var fileStream = new FileStream(filePath, FileMode.Create))
        {
            file.CopyTo(fileStream);
        }

        // 文件保存成功，可以进行进一步处理
        return Ok();
    }

    // 没有选择文件或文件为空
    return BadRequest();
}