NetCore3.1 多文件上传

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代码如下：

        [HttpPost]
        [Route("UploadFile")]
        public IActionResult UploadFile([FromForm] IFormFileCollection formFiles, string FileCate)
        {
            var result = _Service.UploadFile(formFiles, FileCate);
            return Ok(result);
        }

主代码

 /// <summary>
        /// 上传图片
        /// </summary>
        /// <param name="formFile"></param>
        /// <param name="path">路劲</param>
        /// <returns></returns>
        public BaseResponse UploadFile(IFormFileCollection formFiles, string FileCate)
        {

            try
            {
                List<UploadDocumentModel> fileLst = new List<UploadDocumentModel>();
                if (formFiles.Count == 0)
                {
                    return CommonBaseResponse.SetResponse<List<UploadDocumentModel>>(null, false, "请选择要上传的文件。");
                }
                var chekResult = CheckFile(formFiles);
                if (!chekResult.IsSuccess)
                {
                    return chekResult;
                }
                foreach (var file in formFiles)
                {
                    var suffix = Path.GetExtension(file.FileName);//提取上传的文件文件后缀
                    var newFileName = Guid.NewGuid().ToString() + suffix;
                    var path = this._pictureOptions.BaseUrl + @"\" + newFileName;
                    var XdPath = this._pictureOptions.BasePath + @"\" + newFileName;
                    var fileSize = file.Length;
                    var fileModel = new UploadDocumentModel() { fileName = newFileName, fileSize = fileSize, suffix = suffix, path = path, fileCate = FileCate, XdPath = XdPath };
                    fileLst.Add(fileModel);

                    if (!System.IO.Directory.Exists(this._pictureOptions.BaseUrl))
                    {
                        System.IO.Directory.CreateDirectory(this._pictureOptions.BaseUrl);
                    }
                    using (var fs = System.IO.File.Create(path))
                    {
                        file.CopyTo(fs);
                        //Stream 都有 Flush() 方法，
                        //根据官方文档的说法
                        //“使用此方法将所有信息从基础缓冲区移动到其目标或清除缓冲区，或者同时执行这两种操作”
                        fs.Flush();
                    }
                }

                return CommonBaseResponse.SetResponse<List<UploadDocumentModel>>(fileLst, true);
            }
            catch (Exception ex)
            {
                throw ExceptionHelper.GetAggregateException("SysDocumentService.UploadFile", "UploadFile", FileCate, ex);
            }
        }
        /// <summary>
        /// 检测文件
        /// </summary>
        /// <param name="formFiles"></param>
        /// <returns></returns>
        private BaseResponse CheckFile(IFormFileCollection formFiles)
        {
            foreach (var file in formFiles)
            {
                var fileNameWithoutSuffix = Path.GetFileNameWithoutExtension(file.FileName);//文件名 不包含后缀
                var suffix = Path.GetExtension(file.FileName);//提取上传的文件文件后缀
                var fileSize = file.Length;
                if (fileSize >= this._pictureOptions.MaxSize)
                {
                    return CommonBaseResponse.SetResponse(false, "存在过大的文件。");
                }
                if (!this._pictureOptions.FileTypes.Contains(suffix))//检查文件格式
                {
                    return CommonBaseResponse.SetResponse(false, "存在非法扩展名文件。");
                }
            }
            return CommonBaseResponse.SetResponse(true);
        }

相关参数，采用NEtCore的选项模式。Uploads 为IIS的虚拟目录。

  "FileOptions": {
    "FileTypes": ".gif,.jpg,.jpeg,.png,.bmp,.GIF,.JPG,.JPEG,.PNG,.BMP",
    "MaxSize": 10485760,
    "BaseUrl": "D:\\dotnet\\fileServer\\WuanManagerFiles",
    "BasePath": "Uploads" 
  }

注：FileCate可以不要。结合业务进行取舍。

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