C#壓縮和解壓工具類

壓縮和解壓縮，支持子文件夾

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.IO.Packaging;

namespace CMD.EDI
{
    public class ZipHandler
    {
        public static void Compress(FileInfo fi, DirectoryInfo dir)
        {
            if (fi.Exists)
            {
                fi.Delete();
            }

        Package zipFilePackage = ZipPackage.Open(fi.FullName, FileMode.OpenOrCreate, FileAccess.ReadWrite);

        foreach (FileInfo physicalFile in dir.GetFiles())
        {
            string physicalfilePath = physicalFile.FullName;

            Uri partUri = PackUriHelper.CreatePartUri(new Uri(physicalFile.Name, UriKind.Relative));

            PackagePart newFilePackagePart = zipFilePackage.CreatePart(partUri, System.Net.Mime.MediaTypeNames.Text.Xml);

            byte[] fileContent = File.ReadAllBytes(physicalfilePath);

            newFilePackagePart.GetStream().Write(fileContent, 0, fileContent.Length);
        }

        foreach (DirectoryInfo subDir in dir.GetDirectories())
        {
            foreach (FileInfo physicalFile in subDir.GetFiles())
            {
                string physicalfilePath = physicalFile.FullName;

                Uri partUri = PackUriHelper.CreatePartUri(new Uri(subDir.Name + "/" + physicalFile.Name, UriKind.Relative));

                PackagePart newFilePackagePart = zipFilePackage.CreatePart(partUri, System.Net.Mime.MediaTypeNames.Text.Xml);

                byte[] fileContent = File.ReadAllBytes(physicalfilePath);

                newFilePackagePart.GetStream().Write(fileContent, 0, fileContent.Length);
            }
        }

        zipFilePackage.Close();
    }

    public static bool Decompress(FileInfo fi, string origName)
    {
        bool returnVal = false;

        string curFile = fi.FullName;

        Package zipFilePackage = ZipPackage.Open(curFile, FileMode.Open, FileAccess.ReadWrite);

        foreach (ZipPackagePart contentFile in zipFilePackage.GetParts())
        {
            CreateFile(origName, contentFile);
            returnVal = true;
        }

        zipFilePackage.Close();

        return returnVal;
    }

    private static void CreateFile(string rootFolder, ZipPackagePart contentFile)
    {
        // Initially create file under the folder specified
        string contentFilePath = string.Empty;
        contentFilePath = contentFile.Uri.OriginalString.Replace('/',
                         System.IO.Path.DirectorySeparatorChar);

        if (contentFilePath.StartsWith(
            System.IO.Path.DirectorySeparatorChar.ToString()))
        {
            contentFilePath = contentFilePath.TrimStart(
                                     System.IO.Path.DirectorySeparatorChar);
        }
        else
        {
            //do nothing
        }

        contentFilePath = System.IO.Path.Combine(rootFolder, contentFilePath);
        //contentFilePath =  System.IO.Path.Combine(rootFolder, contentFilePath); 

        //Check for the folder already exists. If not then create that folder

        if (System.IO.Directory.Exists(
            System.IO.Path.GetDirectoryName(contentFilePath)) != true)
        {
            System.IO.Directory.CreateDirectory(
                      System.IO.Path.GetDirectoryName(contentFilePath));
        }
        else
        {
            //do nothing
        }

        System.IO.FileStream newFileStream =
                System.IO.File.Create(contentFilePath);
        newFileStream.Close();
        byte[] content = new byte[contentFile.GetStream().Length];
        contentFile.GetStream().Read(content, 0, content.Length);
        System.IO.File.WriteAllBytes(contentFilePath, content);
    }
}

}</pre>