SharpZipLib 壓縮ZIP導出

   　　　　  var uploadSectionDir = Path.Combine("Upload", "QQ", DateTime.Now.ToString("yyyyMMdd"));
            string uploadDir = Path.Combine(HttpRuntime.AppDomainAppPath, uploadSectionDir);
            if (!Directory.Exists(uploadDir))
            {
                Directory.CreateDirectory(uploadDir);
            }
            string fileName ="test.zip";
            string filePath = Path.Combine(uploadDir, fileName);

            //生成的壓縮文件為test.zip
            using (FileStream fsOut = System.IO.File.Create(filePath))
            {
                //ZipOutputStream類的構造函數需要一個流，文件流、內存流都可以，壓縮后的內容會寫入到這個流中。
                using (ZipOutputStream zipStream = new ZipOutputStream(fsOut))
                {
                    MemoryStream ws = new AirBillBLL().ExportToExcel(ladingNoList);
                    string entryName = string.Concat(string.Format("{0:yyyyMMddHHmmssffff}", DateTime.Now), ".xls");
                    ZipEntry newEntry = new ZipEntry(entryName);
                    newEntry.DateTime = DateTime.Now;
                    newEntry.Size = ws.Length;

                    //把壓縮項的信息添加到ZipOutputStream中。
                    zipStream.PutNextEntry(newEntry);
                    byte[] buffer = new byte[4096];
                    //把需要壓縮文件以文件流的方式復制到ZipOutputStream中。

                    StreamUtils.Copy(ws, zipStream, buffer);

                    zipStream.CloseEntry();
                    zipStream.IsStreamOwner = false;
                    zipStream.Finish();
                    zipStream.Close();
                }
            }
35             return File(filePath, "application/x-zip-compressed", string.Concat(string.Format("{0:yyyyMMddHHmmssffff}", DateTime.Now), ".zip"));

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