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I have faced situation for downloading large blob files from azure server to local folder. It was easy to download the file from azure server. But if file has more than 2 GB (means larger size) it will got error in the middle of the downloading. When I was facing the issue, I was search on google and not found feasible solution soon that’s why I posted this compress and decompress codes here..

using System.IO.Compression;

 

Compress files ….

public static void Compress(FileInfo fi)

        {

            // Get the stream of the source file.

            using (FileStream inFile = fi.OpenRead())

            {

                // Prevent compressing hidden and

                // already compressed files.

                if ((File.GetAttributes(fi.FullName)

                    & FileAttributes.Hidden)

                    != FileAttributes.Hidden & fi.Extension != “.gz”)

                {

                    ///**

                    //string[] filesplits = fi.FullName.Split(‘.’);

                    // Create the compressed file.

                    using (FileStream outFile =

                                File.Create(fi.FullName + “.gz”))

                    {

                        using (GZipStream Compress =

                            new GZipStream(outFile,

                            CompressionMode.Compress))

                        {

                            // Copy the source file into

                            // the compression stream.

                            inFile.CopyTo(Compress);

                            Console.WriteLine(“Compressed {0} from {1} to {2} bytes.”,

                                fi.Name, fi.Length.ToString(), outFile.Length.ToString());

                        }

                    }

                }

            }

        }

 

 

Decompress compressed file..

public void Decompress(FileInfo fi)

        {

            // Get the stream of the source file.

            using (FileStream inFile = fi.OpenRead())

            {

                // Get original file extension, for example

                // “doc” from report.doc.gz.

                string origName = curFile.Remove(curFile.Length -

                        fi.Extension.Length);

                //Create the decompressed file.

                using (FileStream outFile = File.Create(origName))

                {

                    using (GZipStream Decompress = new GZipStream(inFile,

                            CompressionMode.Decompress))

                    {

                        // Copy the decompression stream

                        // into the output file.

                        Decompress.CopyTo(outFile);

                        Console.WriteLine(“Decompressed: {0}”, fi.Name);

                    }

                }

            }

        }