Question

//我的代码压缩使用7 zip

  if (System.IO.Directory.Exists(targetfolder))
                {
                    try
                    {

                        SevenZipCompressor.SetLibraryPath(@Server.MapPath("~/bin/7z.Libs.16.2.1/bin/x64/7z.dll")); 
                        SevenZipCompressor sevenZipCompressor = new SevenZipCompressor();
                        sevenZipCompressor.CompressionLevel = SevenZip.CompressionLevel.Ultra; // level compress
                        sevenZipCompressor.CompressionMethod = CompressionMethod.Lzma2; //method compress
                        sevenZipCompressor.CompressDirectory(sourceCodeFolder, Path.Combine(targetfolder, string.Concat(DateTime.Now.ToString("ddMMyyyy_HHmm") + fldr + ".zip")));
                    }

                    catch (Exception se)
                    {
                        SevenZipCompressor.SetLibraryPath(@Server.MapPath("~/bin/7z.Libs.16.2.1/bin/x86/7z.dll"));
                        SevenZipCompressor sevenZipCompressor = new SevenZipCompressor();
                        sevenZipCompressor.CompressionLevel = SevenZip.CompressionLevel.Ultra; // level compress 
                        sevenZipCompressor.CompressionMethod = CompressionMethod.Lzma2; // method compress

//我的代码出了什么问题？ sevenZipCompressor.CompressDirectory（sourceCodeFolder，Path.Combine（targetfolder，string.Concat（DateTime.Now.ToString（“ddMMyyyy_HHmm”）+ fldr +“。zip”）））;

                    }


                    Directory.Delete(@Server.MapPath("~/Upload/" + fldr), true);
                    extractfrom = @Server.MapPath("~/Upload/ZIP/" + string.Concat(DateTime.Now.ToString("ddMMyyyy_HHmm")) + fldr + ".zip");

                    customSQL.ExecQueryString(" UPDATE TBL_PROGRESS_LEGAL_DOKUMEN set FileName = '" + string.Concat(DateTime.Now.ToString("ddMMyyyy_HHmm")  + namafile + ".zip"+ "'  , [FileSize] = '" + filesize + "'  where id_progress_legal_dokumen = '" + id_chekUpload.Text + "'"));
                    myfeedback._success("File Success Upload");
                }

                else
                {

                }

我的问题为什么7zip使压缩7mb只有6mb？

Answer 1

（大多数）PDF已经过压缩，你可以通过归档获得很多。

Why don't some files compress very much?
Which files does not reduce its size after compression

压缩文件doc pdf使用7zipsharp？

1 个答案: