c#压缩解压缩cab文件

CabDotNet源代码单文件版，支持cab压缩解压缩

压缩cab文件

using System;
using System.IO;
using System.Runtime.InteropServices;

using CabWrapper;
using CabDotNet;

// Jim Mischel <jim@mischel.com>, 11/21/2004
namespace testfci
{
    class Class1
    {
        // When a CAB file reaches this size, a new CAB will be created
        // automatically.  This is useful for fitting CAB files onto disks.
        //
        // If you want to create just one huge CAB file with everything in
        // it, change this to a very very large number.
        private const int MediaSize = 300000;

        // When a folder has this much compressed data inside it,
        // automatically flush the folder.
        //
        // Flushing the folder hurts compression a little bit, but
        // helps random access significantly.
        private const int FolderThreshold = 900000;

        // Compression type to use
        private const FciCompression CompressionType = FciCompression.MsZip;

        // Our internal state
        //
        // The FCI APIs allow us to pass back a state pointer of our own
        internal class ClientState
        {
            internal int totalCompressedSize;   /* total compressed size so far */
            internal int totalUncompressedSize; /* total uncompressed size so far */
        }
        [STAThread]
        static void Main(string[] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine("TESTFCI - Demonstrates how to use the FCI library API calls\n");
                Console.WriteLine("Usage: TESTFCI file1 [+] [file2] [+] [file3] ...\n");
                Console.WriteLine("Where <file1>...<fileN> are input files, and a + forces a folder boundary)");
                Console.WriteLine("Output cabinets are named C:\\TEST1.CAB, C:\\TEST2.CAB, ...\n");
                Console.WriteLine("  e.g. testfci test.dat source.c test.c + baloon.bmp cabbage.bmp\n");
                return;
            }
            if (doFciTest(args))
                Console.WriteLine(@"TESTFCI was successful, cabinets created on C:\");
            else
                Console.WriteLine("TESTFCI failed");
        }

        static bool doFciTest(string[] args)
        {
            // our client state
            ClientState cs = new ClientState();
            cs.totalCompressedSize = 0;
            cs.totalUncompressedSize = 0;

            bool returnResult = true;

            CabCompressor cabComp = new CabCompressor();
            try
            {
                setCabParameters(cabComp);
                cabComp.UserData = cs;

                // setup event handlers
                cabComp.NextCabinet += new NextCabinetEventHandler(cabComp_NextCabinet);
                cabComp.FilePlaced += new FilePlacedEventHandler(cabComp_FilePlaced);
                cabComp.FileAdded += new ProgressEventHandler(cabComp_FileAdded);
                cabComp.FolderComplete += new ProgressEventHandler(cabComp_FolderComplete);
                cabComp.CabinetComplete += new ProgressEventHandler(cabComp_CabinetComplete);

                // add each file
                foreach (string filename in args)
                {
                    // Flush the folder?
                    if (filename == "+")
                    {
                        cabComp.FlushFolder();
                        // continue with next file name
                        continue;
                    }

                    // Don't store path information in the cabinet file
                    string strippedName = Path.GetFileName(filename);

                    cabComp.AddFile(filename, strippedName, false, CompressionType);
                }

                // All done adding files.  Flush the cabinet.
                // This will automatically flush the folder first.
                cabComp.FlushCabinet();
                Console.Write("                                                 \r");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
                returnResult = false;
            }
            finally
            {
                cabComp.Dispose();
            }

            return returnResult;
        }

        static void setCabParameters(CabCompressor cabComp)
        {
            cabComp.CabInfo.MaxCabinetSize = MediaSize;
            cabComp.CabInfo.MaxFolderSize = FolderThreshold;

            // Don't reserve space for any extensions
            cabComp.CabInfo.HeaderReserve = 0;
            cabComp.CabInfo.FolderReserve = 0;
            cabComp.CabInfo.DataReserve = 0;

            // We use this to create the cabinet name
            cabComp.CabInfo.CabinetNumber = 1;

            // If you want to use disk names, use this to count disks
            cabComp.CabInfo.DiskNumber = 0;

            // Choose your own SetId
            cabComp.CabInfo.SetId = 12345;

            // Only important if CABs are spanning multiple disks,
            // in which case you will want to use a real disk name.
            //
            // Can be left as an empty string.
            cabComp.CabInfo.DiskName = "MyDisk";

            // where to store the created CAB files
            cabComp.CabInfo.CabPath = @"e:\cabdotnet\trash\";

            // store name of first CAB file
            cabComp.CabInfo.CabName = storeCabName(cabComp.CabInfo.CabinetNumber);
        }

        static string storeCabName(int iCab)
        {
            return string.Format("TEST{0}.CAB", iCab);
        }

        public static void cabComp_NextCabinet(object sender, NextCabinetEventArgs e)
        {
            // Cabinet counter has been incremented already by FCI

            // Store next cabinet name
            string cabName = storeCabName(e.CabInfo.CabinetNumber);
            e.CabInfo.CabName = cabName;

            // You could change the disk name here too, if you wanted

            e.Result = true;
        }

        public static void cabComp_FilePlaced(object sender, FilePlacedEventArgs e)
        {
            Console.WriteLine("  placed file '{0}' (size {1}) on cabinet '{2}'",
                e.FileName, e.FileSize, e.CabInfo.CabName);

            if (e.Continuation)
                Console.WriteLine("      (Above file is a later segment of a continued file)");

            e.Result = 0;
        }

        public static void cabComp_FileAdded(object sender, ProgressEventArgs e)
        {
            ClientState cs = (ClientState)e.UserData;
            cs.totalCompressedSize += e.CompressedBlockSize;
            cs.totalUncompressedSize += e.UncompressedBlockSize;

            Console.Write(
                "Compressing: {0} -> {1}             \r",
                cs.totalUncompressedSize,
                cs.totalCompressedSize
                );
            e.Result = 0;
        }

        public static void cabComp_FolderComplete(object sender, ProgressEventArgs e)
        {
            int percentage = GetPercentage(e.FolderBytesCopied, e.FolderSize);

            Console.Write("Copying folder to cabinet: {0}%      \r", percentage);
            e.Result = 0;
        }

        private static int GetPercentage(int a, int b)
        {
            if (b == 0)
                return 0;

            return ((a*100)/b);
        }

        public static void cabComp_CabinetComplete(object sender, ProgressEventArgs e)
        {
            Console.Write("Estimated cabinet size = {0}.  Actual size = {1}", e.EstimatedCabSize, e.ActualCabSize);
            e.Result = 0;
        }
    }
}

解压缩cab文件

using System;
using System.IO;
using System.Runtime.InteropServices;

using CabDotNet;
using CabWrapper;

// Jim Mischel <jim@mischel.com>, 11/21/2004
namespace testfdi
{
    class Class1
    {
        private static string destinationDirectory = string.Empty;

        [STAThread]
        static void Main(string[] args)
        {
            if (args.Length != 2)
            {
                Console.WriteLine(
                    "TESTFDI - Demonstrates how to use the CabDecompressor interface.\n\n" +
                    "Usage: TESTFDI cabinet dest_dir\n\n" +
                    "Where <cabinet> is the name of a cabinet file, and <dest_dir>\n" +
                    "is the destination for the files extracted\n\n" +
                    "  e.g. testfdi c:\\test1.cab c:\\\n");
                return;
            }

            destinationDirectory = args[1];

            if (doFdiTest(args[0]))
                Console.WriteLine("TestFdi was successful.");
            else
                Console.WriteLine("TestFdi failed.");
        }

        static bool doFdiTest(string cabinetFullPath)
        {
            using (CabDecompressor decomp = new CabDecompressor())
            {
                // setup event handlers
                decomp.NotifyCabinetInfo += new NotifyEventHandler(decomp_NotifyCabinetInfo);
                decomp.NotifyCloseFile += new NotifyEventHandler(decomp_NotifyCloseFile);
                decomp.NotifyCopyFile += new NotifyEventHandler(decomp_NotifyCopyFile);
                decomp.NotifyEnumerate += new NotifyEventHandler(decomp_NotifyEnumerate);
                decomp.NotifyNextCabinet += new NotifyEventHandler(decomp_NotifyNextCabinet);
                decomp.NotifyPartialFile += new NotifyEventHandler(decomp_NotifyPartialFile);

                FdiCabinetInfo cabInfo = new FdiCabinetInfo();

                using (FileStream fs = new FileStream(cabinetFullPath, FileMode.Open))
                {
                    if (!decomp.IsCabinetFile(fs, cabInfo))
                    {
                        Console.WriteLine("File is not a cabinet.");
                        return false;
                    }
                    // The file is a cabinet.  Display some info.
                    Console.WriteLine(
                        "Information on cabinet file '{0}'\n" +
                        "   Total length of cabinet file : {1}\n" +
                        "   Number of folders in cabinet : {2}\n" +
                        "   Number of files in cabinet   : {3}\n" +
                        "   Cabinet set ID               : {4}\n" +
                        "   Cabinet number in set        : {5}\n" +
                        "   RESERVE area in cabinet?     : {6}\n" +
                        "   Chained to prev cabinet?     : {7}\n" +
                        "   Chained to next cabinet?     : {8}\n",
                        cabinetFullPath,
                        cabInfo.Length,
                        cabInfo.FolderCount,
                        cabInfo.FileCount,
                        cabInfo.SetId,
                        cabInfo.CabinetNumber,
                        cabInfo.HasReserve,
                        cabInfo.HasPrev,
                        cabInfo.HasNext);
                }
                // extract path and filename
                string cabinetName = Path.GetFileName(cabinetFullPath);
                string cabinetPath = Path.GetDirectoryName(cabinetFullPath);
                if (cabinetPath != string.Empty)
                    cabinetPath = cabinetPath + Path.DirectorySeparatorChar;

                // let's copy some files!
                if (!decomp.ExtractFiles(cabinetFullPath))
                {
                    Console.WriteLine("FdiCopy failed.  Error code {0}", decomp.ErrorInfo.FdiErrorCode);
                    return false;
                }

                return true;

            }
        }

        public static void decomp_NotifyCabinetInfo(object sender, NotifyEventArgs e)
        {
            Console.WriteLine("Cabinet Info" +
                "  Next cabinet     = {0}\n" +
                "  Next disk        = {1}\n" +
                "  Cabinet path     = {2}\n" +
                "  Cabinet set id   = {3}\n" +
                "  Cabinet # in set = {4}",
                e.args.str1, e.args.str2, e.args.CabinetPathName,
                e.args.SetId, e.args.CabinetNumber);
            e.Result = 0;
        }

        public static void decomp_NotifyPartialFile(object sender, NotifyEventArgs e)
        {
            Console.WriteLine("Partial File\n" +
                "  Name of continued file            = {0}\n" +
                "  Name of cabinet where file starts = {1}\n" +
                "  Name of disk where file starts    = {2}",
                e.args.str1, e.args.str2, e.args.CabinetPathName);
            e.Result = 0;
        }

        public static void decomp_NotifyCopyFile(object sender, NotifyEventArgs e)
        {
            Console.Write("Copy File\n" +
                "  File name in cabinet   = {0}\n" +
                "  Uncompressed file size = {1}\n" +
                " Copy this file? (y/n): ",
                e.args.str1, e.args.Size);
            string response = "Y";
            do
            {
                response = Console.ReadLine().ToUpper();
            } while (response != "Y" && response != "N");

            if (response == "Y")
            {
                int err = 0;
                string destFilename = destinationDirectory + e.args.str1;
                IntPtr fHandle = CabIO.FileOpen(destFilename, FileAccess.Write,
                    FileShare.ReadWrite, FileMode.Create, ref err);
                e.Result = (int)fHandle;
            }
            else
            {
                e.Result = 0;
            }
        }

        public static void decomp_NotifyCloseFile(object sender, NotifyEventArgs e)
        {
            Console.WriteLine("Close File Info\n" +
                "  File name in cabinet = {0}", e.args.str1);

            string fname = destinationDirectory + e.args.str1;

            // TODO:  Most of this function probably should be encapsulated in the parent object.
            int err = 0;
            CabIO.FileClose(e.args.FileHandle, ref err, null);

            // set file date and time
            DateTime fileDateTime = FCntl.DateTimeFromDosDateTime(e.args.FileDate, e.args.FileTime);
            File.SetCreationTime(fname, fileDateTime);
            File.SetLastWriteTime(fname, fileDateTime);

            // get relevant file attributes and set attributes on the file
            FileAttributes fa = FCntl.FileAttributesFromFAttrs(e.args.FileAttributes);
            File.SetAttributes(fname, fa);

            e.Result = 1;
        }

        public static void decomp_NotifyNextCabinet(object sender, NotifyEventArgs e)
        {
            Console.WriteLine("Next Cabinet\n" +
                "  Name of next cabinet where file continued = {0}\n" +
                "  Name of next disk where file continued    = {1}\n" +
                "  Cabinet path name                         = {2}\n",
                e.args.str1, e.args.str2, e.args.str3);
            e.Result = 0;
        }

        public static void decomp_NotifyEnumerate(object sender, NotifyEventArgs e)
        {
        }
    }
}

标签： isp 代码

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