如何使用ViewModel实现文件上传Web API映射以将数据存储在数据库中

Question

我创建了一个API，以将文件上传到dotnet核心。

 [HttpPost("uploads")]
    public async Task<IActionResult> PostUploads(IFormFile filedata)
    {
        if (filedata == null) return BadRequest("Null File");
        if (filedata.Length == 0)
        {
            return BadRequest("Empty File");
        }
        if (filedata.Length > 10 * 1024 * 1024) return BadRequest("Max file size exceeded.");
        if (!ACCEPTED_FILE_TYPES.Any(s => s == Path.GetExtension(filedata.FileName).ToLower())) return BadRequest("Invalid file type.");
        var uploadFilesPath = Path.Combine(environment.WebRootPath, "uploads");
        if (!Directory.Exists(uploadFilesPath))
            Directory.CreateDirectory(uploadFilesPath);
        var fileName = Guid.NewGuid().ToString() + Path.GetExtension(filedata.FileName);
        var filePath = Path.Combine(uploadFilesPath, fileName);
        using (var stream = new FileStream(filePath, FileMode.Create))
        {
            await filedata.CopyToAsync(stream);
        }
        var photo = new FileUploadAttachment { Name = fileName };
        var filePaths = new FileUploadAttachment { FilePath = filePath };
        _GpsContext.FileUploadAttachments.Add(photo);
        _GpsContext.FileUploadAttachments.Add(filePaths);
        await _GpsContext.SaveChangesAsync();
        return Ok();
    }

我想使用创建实体时获得的一些ID改进数据库中的代码和存储。我的实体框架表如下所示：

public class FileUploadAttachment
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public string FileTypeExt { get; set; }
    public string FilePath { get; set; }
    public string EntityName { get; set; }
    public Guid? EntityId { get; set; }      
}

我使用相同的映射创建了View模型，该模型可以在JSON中显示上述代码字段。视图模型的结构链接如下：

public class FilesVm
{
    public string Id { get; set; }
    public string Name { get; set; }
    public string FileTypeExt { get; set; }
    public string FilePath { get; set; }
    public string EntityName { get; set; } // This is value will get from screen where the file will be upload
    public Guid? EntityId { get; set; } // This id will get from the screen where it will be created.
}

如何在控制器中实现此视图模型。