通过ASP.Net MVC应用程序压缩的Compressed（Zipped）文件夹在打开时无效

Question

我使用ZipArchive压缩了字节数组。在执行以下方法时，它提示您保存压缩的文件夹，但在尝试打开文件夹时提示“窗口无法打开该文件夹。压缩的（压缩的）文件夹无效。”错误。以下是压缩文件的代码。

public void CompressFile() {            
            using (var compressedFileStream = new MemoryStream())
            //Create an archive and store the stream in memory.
            using (var zipArchive = new ZipArchive(compressedFileStream,ZipArchiveMode.Create, true))
            {
                //Create a zip entry for each attachment
                var zipEntry = zipArchive.CreateEntry("FY14 statements");
                byte[] pdf = _dmsbl.DocumentData(4);

                //Get the stream of the attachment
                using (var originalFileStream = new MemoryStream(pdf))

                using (System.IO.Stream entryStream = zipEntry.Open())
                {
                    originalFileStream.CopyTo(entryStream);                    
                }                              

                SendOutZip(compressedFileStream.ToArray(), "FileName.zip");

            }
        }


private void SendOutZip(byte[] zippedFiles, string filename)
        {
            Response.Clear();
            Response.ClearContent();
            Response.ClearHeaders();
            Response.ContentType = "application/x-compressed";
            Response.Charset = string.Empty;
            Response.Cache.SetCacheability(System.Web.HttpCacheability.Public);
            Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
            Response.BinaryWrite(zippedFiles);
            Response.OutputStream.Flush();
            Response.OutputStream.Close();
            Response.End();
        }