ASPNET 文件批量下载

2018-11-13 07:34:11来源：博客园阅读 ()

HTML

<a class="btn btn-warning" id="btnDownload">选中下载</a>

        /*
            批量下载
        */
        // li 列表的文件下载
        $("#btnDownload").on('click', function() {
                var arr = [];
                var urls = escape(arr.join(','));
                $(this).attr('href', '@Url.Action("BatchDownloadFiles")?str=' + urls + '&r=' + Math.random());
        });

API

        public ActionResult BatchDownloadFiles(string str, int type)
        {
            var idList = str.Split(',').ToList().ConvertAll(x => int.Parse(x));
            MemoryStream ms = new MemoryStream();
            ZipOutputStream zos = new ZipOutputStream(ms);
            zos.IsStreamOwner = false;
            zos.SetLevel(1);//设置压缩级别

            var rsp = new GetListByDetailIDListRequest
            {
                UserID = CurrentUserId,
                JobTypeID = type,
                IDList = idList
            }.GetResponse();
            if (rsp.IsSuccess)
            {
                rsp.Data.ForEach(dto =>
                {
                    var filebyte = ByteOfGetOrderFiles(dto);   //byte类型的数据
                    ZipEntry entry = new ZipEntry(fileName);  //定义新的压缩数据对象
                    zos.PutNextEntry(entry);
                    zos.Write(filebyte, 0, filebyte.Length);  //写入
                });
            }
            zos.Finish();
            zos.Close();

            ms.Position = 0;
            return File(ms, "application/x-zip-compressed", string.Format("批量下载文件-{0}.zip", DateTime.Now.ToString("yyyy年MM月dd HH时mm分ss秒")));
        }

        public byte[] ByteOfGetOrderFiles(ExtractRecordDetailDTO dto)
        {
            var stream = DownloadFile(dto.SourceFile);
            byte[] buffur = new byte[stream.Length];
            stream.Read(buffur, 0, (int)stream.Length);
            return buffur;
        }
        
　　　　public static Stream DownloadFile(string path)
　　　　{
　　　　　　using (var client = new WebClient())
　　　　　　{
　　　　　　　　var stream = client.DownloadData(path);
　　　　　　　　var outStream = new MemoryStream(stream);
　　　　　　　　return outStream;
　　　　　　}
　　　　}