need help in zip conversion using Gstream

Question

i am using this code for compression of file to zip

     public static void Compress(FileInfo fileToCompress)
    {
        using (FileStream originalFileStream = fileToCompress.OpenRead())
        {
            if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fileToCompress.Extension != ".zip")
            {
                using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + "_" + DateTime.Now.ToString("dd_MM_yyyy") + ".zip"))
                {

                    using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))
                    {
                        originalFileStream.CopyTo(compressedFileStream);
                        Console.WriteLine("Compressed {0} from {1} to {2} bytes.",
                            fileToCompress.Name, fileToCompress.Length.ToString(), compressedFileStream.Length.ToString());
                    }
                }
            }
        }
    }

with this code i convert file to zip for example i have file with name myfile.pdf what it does, it saves this file with myfile.pdf_31_7_2013.zip but the problem is when i extract this zip it contains my file with extention myfile.pdf_31_7_2013 which will be invaild file coz its extention changed from .pdf to .pdf_31_7_2013

so its extention is changed. i want to modify code in a way that zip name should be the same as it performs right now. but inside that my file should be with only myfile.pdf

please help me to solve this. thanks in advance

Answer 1

You should change the file format so that:

• The extension is gz
• The part before the extension is appropriate for your file, so that when .gz has been removed, it will be a reasonable filename.

So instead of converting myfile.pdf into myfile.pdf_31_7_2013.zip, I'd convert it into myfile-20130731.pdf.gz. When it's extract, it will become myfile-20130731.pdf. Note that using yyyyMMdd is cleaner than MM_d_yyyy as it's sortable and unambiguous.