public async Task <JsonResult> AddBanner(AddBannerDto dto, IFormFile uploadFile) { if (uploadFile == null) { return(Json(new ResponseDto { Code = 0, Message = "请上传图片!" })); } var webRootPath = _hostEnvironment.ContentRootPath; var relativeDirPath = "wwwroot\\UploadFiles\\BannerPic"; var absolutePath = Path.Combine(webRootPath, relativeDirPath); var fileTypes = new string[] { ".gif", ".jpg", ".jpeg", ".png", ".bmp" }; var extension = Path.GetExtension(uploadFile.FileName); if (!fileTypes.Contains(extension.ToLower())) { return(Json(new ResponseDto { Code = 0, Message = "图片格式有误!" })); } if (!Directory.Exists(absolutePath)) { Directory.CreateDirectory(absolutePath); } var fileName = DateTime.Now.ToString("yyyyMMddHHmmss") + extension; var filePath = Path.Combine(absolutePath, fileName); await using (var stream = new FileStream(filePath, FileMode.Create)) { await uploadFile.CopyToAsync(stream); } dto.Image = Path.Combine("/UploadFiles/BannerPic/", fileName); return(Json(_bannerAppService.AddBanner(dto))); }