如何使用C＃将Excel文件压缩为zip或cap文件扩展名

Question

I want to compress a Excel file to .zip or .cap extension. The code Used to do that it is compressing the file but that zip file can't be unzip. while unzip that i am getting the error file file corrupted or can't be unzip. The code I am using:

    static public bool CompressFile(string file, string outputFile)

      {

        try
        {

            using (var inFile = File.OpenRead(file))
            {

                using (var outFile = File.Create(outputFile))
                {

                    using (var compress = new GZipStream(outFile, CompressionMode.Compress, false))
                    {

                        byte[] buffer = new byte[inFile.Length];


                        int read = inFile.Read(buffer, 0, buffer.Length);

                        while (read > 0)
                        {
                            compress.Write(buffer, 0, read);
                            read = inFile.Read(buffer, 0, buffer.Length);
                        }
                    }
                }
            }
            return true;
        }
        catch (IOException ex)
        {
       MessageBox.Show(string.Format("Error compressing file: {0}", ex.Message));
            return false;
        }
    }

Even i go some link to get the proper solution. But nothing is workout.I need some suggestion to get the proper solution. Any answer please.

Answer 1

This code uses the SharpZipLib library and will compress files that can be uncompressed no problems

    private void Zip()
    {
        string output = @"C:\TEMP\test.zip";
        string input = @"C:\TEMP\test.xlsx";

        using (var zipStream = new ZipOutputStream(System.IO.File.Create(output)))
        {
            zipStream.SetLevel(9);
            var buffer = new byte[4096];
            var entry = new ZipEntry(Path.GetFileName(input));
            zipStream.PutNextEntry(entry);

            using (FileStream fs = System.IO.File.OpenRead(input))
            {
                int sourceBytes;
                do
                {
                    sourceBytes = fs.Read(buffer, 0, buffer.Length);
                    zipStream.Write(buffer, 0, sourceBytes);
                } while (sourceBytes > 0);
            }

            zipStream.Finish();
            zipStream.Close();
        }
    }