ABP vNext 文件上传

 

第一种方式：文件流方式上传

        #region 文件上传方法 文件流

        //目前限制150Mb以内，单位bytes
        private const long MaxFileSize = 1024 * 1024 * 150;

        // 

        /// 上传一个文件，并返回文件上传成功后的信息
        /// 
        /// 要上传的文件实体
        /// 文件上传成功后返回的文件相关信息
        [OpenApiOperation("Upload", "文件上传接口", "文件上传接口")]
        [RequestSizeLimit(MaxFileSize)]
        //public async Task UploadFile(IFormFile file, string newFileName)
        public async void UploadFile(IFormFile file, string newFileName)
        {
            try
            {
                //文件的原始名称
                string FileOriginName = file.FileName;

                //读取文件保存的根目录
                string fileSaveRootDir = _config.GetSection("CommonConfig:FilePath").Value;  //ConfigHelper.GetAppSetting("App", "FileRootPath");

                //文件保存的相对文件夹(保存到wwwroot目录下)
                string absoluteFileDir = "/wwwroot" + fileSaveRootDir;

                //文件保存的路径(应用的工作目录+文件夹相对路径);
                string fileSavePath = Environment.CurrentDirectory + absoluteFileDir;
                if (!Directory.Exists(fileSavePath))
                {
                    Directory.CreateDirectory(fileSavePath);
                }

                //生成文件的名称
                string Extension = Path.GetExtension(FileOriginName);//获取文件的源后缀
                if (string.IsNullOrEmpty(Extension))
                {
                    throw new BusinessException(message: "文件上传的原始名称好像不对哦，没有找到文件后缀");
                }
                //string fileName = FileOriginName.Split('.')[0] + Guid.NewGuid().ToString() + Extension;  //Guid.NewGuid().ToString() + Extension;//通过uuid和原始后缀生成新的文件名

                //最终生成的文件的绝对路径（xxx/xxx/xx.xx）
                string finalyFilePath = fileSavePath + "/" + newFileName;

                FileUploadOutputDto result = new FileUploadOutputDto();

                //打开上传文件的输入流
                Stream stream = file.OpenReadStream();
                创建输入流的reader
                var fileType = stream.GetFileType();
                文件大小
                //result.FileLength = stream.Length;
                //result.FileName = FileOriginName;
                //result.FileType = Extension.Substring(1);
                //result.FileUrl = absoluteFileDir + "/" + fileName;

                //开始保存拷贝文件
                FileStream targetFileStream = new FileStream(finalyFilePath, FileMode.OpenOrCreate);
                await stream.CopyToAsync(targetFileStream);

                //return result;
            }
            catch (Exception ex)
            {
                throw new BusinessException(message: "文件上传失败，" + ex.Message);
            }
        }

        #endregion 文件上传方法 文件流

 

第二种方式：abp自带

注意：IBlobContainer blobContainer nuget包引用，以及包版本

下面代码不完整，相当于提供一个大概思路，用abp vNext自带的上传组件，代码量少一些，但引用包版本需要注意。

//目前限制150Mb以内，单位bytes
private const long MaxFileSize = 1024 * 1024 * 150;
IBlobContainer blobContainer
_blobContainer = blobContainer;


#region 文件上传abp自带

        [RequestSizeLimit(MaxFileSize)]
        public async Task> UploadFileAsync(CreateUpdateBusiMachineFilesInDto body)
        {
            var fileBytes = StreamToBytes(body.file.OpenReadStream());
            var fileName = body.file.FileName.EnsureTrim();
            var extension = Path.GetExtension(fileName).EnsureTrim();
            var fileSize = fileBytes.Length;
            var fileHash = GetBytesMd5(fileBytes);

            var id = GuidGenerator.Create();
            var filePath = $"{id}{extension}";
            UploadFileAsync(filePath, fileBytes);

            CreateUpdateBusiMachineFilesInDto inDto = new CreateUpdateBusiMachineFilesInDto()
            {
                WorkCenter = "",
                MachineCode = "",
                MachineFileCategory = extension,
                FilePath = "",
                FileName = fileName,
                FileSize = fileSize.ToString(),
                Op = "",
                ProductCode = "",
                WoNbr = "",
                Note = ""
            };

            var entity = ObjectMapper.Map(inDto);
            entity.ResetProp(nameof(entity.Id), id);
            entity.AddCreatorName(AbpCurrentUser.LoginName)
                .ResetStringProps();
            await _busiMachineFilesRepo.InsertAsync(entity);
            return true.ToApiResult();

            //var file = new FileEntity(id)
            //{
            //    FileSize = fileSize,
            //    Extension = extension,
            //    FileName = fileName,
            //    FilePath = filePath,
            //    FileHash = fileHash
            //};
            //await _programFileRepo.InsertAsync(file);
            //await CurrentUnitOfWork.SaveChangesAsync();
            //var result = file.ToJson().ToObject();
            //return result.ToApiResult();
        }

        public async void UploadFileAsync(string filePath, byte[] fileBytes)
        {
            await _blobContainer.SaveAsync(filePath, fileBytes, true); //保存
        }

#endregion 文件上传abp自带


#region 私有方法，接入文件存储服务之后，统一删除

        private static byte[] StreamToBytes(Stream stream)
        {
            if (!stream.CanSeek || !stream.CanWrite)
            {
                using (var ms = new MemoryStream())
                {
                    stream.CopyToAsync(ms).GetAwaiter().GetResult();
                    ms.Seek(0, SeekOrigin.Begin);
                    var bytes = new byte[ms.Length];
                    ms.Read(bytes, 0, bytes.Length);
                    ms.Close();
                    return bytes;
                }
            }
            else
            {
                var bytes = new byte[stream.Length];
                stream.Seek(0, SeekOrigin.Begin);
                stream.Read(bytes, 0, bytes.Length);
                stream.Seek(0, SeekOrigin.Begin);
                return bytes;
            }
        }

        private static string GetBytesMd5(byte[] fileBytes)
        {
            var md5 = new MD5CryptoServiceProvider();
            var retVal = md5.ComputeHash(fileBytes);
            var sb = new StringBuilder();
            foreach (var rv in retVal)
            {
                sb.Append(rv.ToString("x2"));
            }

            return sb.ToString();
        }

        #endregion 私有方法，接入文件存储服务之后，统一删除