Web Api 多檔案上傳功能

還是直接貼程式碼比較直觀

       /// <summary>
        /// 多檔案上傳介面
        /// </summary>
        /// <returns></returns>
        public async Task<IHttpActionResult> Upload(string jobid)
        {
            List<Resource> resources = new List<Resource>();
            // multipart/form-data  
 

            // 採用MultipartMemoryStreamProvider  
            var provider = new MultipartMemoryStreamProvider();

            //讀取檔案資料  
            await Request.Content.ReadAsMultipartAsync(provider);

            foreach (var item in provider.Contents)
            {
                // 判斷是否是檔案  
                if
 
 (item.Headers.ContentDisposition.FileName != null)
                {
                    //獲取到流  
                    var ms = item.ReadAsStreamAsync().Result;
                    //進行流操作  
                    using (var br = new BinaryReader(ms))
                    {
                        if (ms.Length <= 0
 
)
                            break;
                        //讀取檔案內容到記憶體中  
                        var data = br.ReadBytes((int)ms.Length);
                        //Create  
                        //當前時間作為ID  
                        Resource resource = new Resource() { Id = DateTime.Now.ToString("yyyyMMddHHmmssffff", DateTimeFormatInfo.InvariantInfo) };

                        //Info  
                        FileInfo info = new FileInfo(item.Headers.ContentDisposition.FileName.Replace("\"", ""));
                        //檔案型別  
                        resource.Type = info.Extension.Substring(1).ToLower();

                        //Write  
                        try
                        {
                            //檔案儲存地址  
                            string dirPath = Path.Combine(ROOT_PATH);
                            if (!Directory.Exists(dirPath))
                            {
                                Directory.CreateDirectory(dirPath);
                            }

                            File.WriteAllBytes(Path.Combine(dirPath, resource.Id), data);
                            resources.Add(resource);
                        }
                        catch { }
                    }
                }
            }

            //返回  
            if (resources.Count == 0)
                return BadRequest();
            else if (resources.Count == 1)
                return Ok(resources.FirstOrDefault());
            else
                return Ok(resources);
        }