ASP.NET生成压缩文件（rar打包）

首先引用ICSharpCode.SharpZipLib.dll,没有在这里下载:http://files.cnblogs.com/files/cang12138/ICSharpCode.SharpZipLib.rar

压缩打包代码：

    /// <summary>
    /// 生成压缩文件
    /// </summary>
    /// <param name="strZipPath">生成的zip文件的路径</param>
    /// <param name="strZipTopDirectoryPath">源文件的上级目录</param>
    /// <param name="intZipLevel">T压缩等级</param>
    /// <param name="strPassword">压缩包解压密码</param>
    /// <param name="filesOrDirectoriesPaths">源文件路径</param>
    /// <returns></returns>
    private bool Zip(string strZipPath, string strZipTopDirectoryPath, int intZipLevel, string strPassword, string[] filesOrDirectoriesPaths)
    {
        try
        {
            List<string> AllFilesPath = new List<string>();
            if (filesOrDirectoriesPaths.Length > ) // get all files path
            {
                for (int i = ; i < filesOrDirectoriesPaths.Length; i++)
                {
                    if (File.Exists(filesOrDirectoriesPaths[i]))
                    {
                        AllFilesPath.Add(filesOrDirectoriesPaths[i]);
                    }
                    else if (Directory.Exists(filesOrDirectoriesPaths[i]))
                    {
                        GetDirectoryFiles(filesOrDirectoriesPaths[i], AllFilesPath);
                    }
                }
            }

            if (AllFilesPath.Count > )
            {

                ZipOutputStream zipOutputStream = new ZipOutputStream(File.Create(strZipPath));
                zipOutputStream.SetLevel(intZipLevel);
                zipOutputStream.Password = strPassword;

                for (int i = ; i < AllFilesPath.Count; i++)
                {
                    string strFile = AllFilesPath[i].ToString();
                    try
                    {
                        if (strFile.Substring(strFile.Length - ) == "") //folder
                        {
                            string strFileName = strFile.Replace(strZipTopDirectoryPath, "");
                            if (strFileName.StartsWith(""))
                            {
                                strFileName = strFileName.Substring();
                            }
                            ZipEntry entry = new ZipEntry(strFileName);
                            entry.DateTime = DateTime.Now;
                            zipOutputStream.PutNextEntry(entry);
                        }
                        else //file
                        {
                            FileStream fs = File.OpenRead(strFile);

                            byte[] buffer = new byte[fs.Length];
                            fs.Read(buffer, , buffer.Length);

                            string strFileName = strFile.Replace(strZipTopDirectoryPath, "");
                            if (strFileName.StartsWith(""))
                            {
                                strFileName = strFileName.Substring();
                            }
                            ZipEntry entry = new ZipEntry(strFileName);
                            entry.DateTime = DateTime.Now;
                            zipOutputStream.PutNextEntry(entry);
                            zipOutputStream.Write(buffer, , buffer.Length);

                            fs.Close();
                            fs.Dispose();
                        }
                    }
                    catch
                    {
                        continue;
                    }
                }

                zipOutputStream.Finish();
                zipOutputStream.Close();

                return true;
            }
            else
            {
                return false;
            }
        }
        catch
        {
            return false;
        }
    }

    /// <summary>
    /// Gets the directory files.
    /// </summary>
    /// <param name="strParentDirectoryPath">源文件路径</param>
    /// <param name="AllFilesPath">所有文件路径</param>
    private void GetDirectoryFiles(string strParentDirectoryPath, List<string> AllFilesPath)
    {
        string[] files = Directory.GetFiles(strParentDirectoryPath);
        for (int i = ; i < files.Length; i++)
        {
            AllFilesPath.Add(files[i]);
        }
        string[] directorys = Directory.GetDirectories(strParentDirectoryPath);
        for (int i = ; i < directorys.Length; i++)
        {
            GetDirectoryFiles(directorys[i], AllFilesPath);
        }
        if (files.Length ==  && directorys.Length == ) //empty folder
        {
            AllFilesPath.Add(strParentDirectoryPath);
        }
    }

        //调用

        string strZipPath = @"D:\ConsultSystem\mgr\user.zip";
        string strZipTopDirectoryPath = @"D:\ConsultSystem\mgr\";
        int intZipLevel = ;
        string strPassword = "";
        string[] filesOrDirectoriesPaths = new string[] { @"D:\ConsultSystem\mgr\user.txt" };
        Zip(strZipPath, strZipTopDirectoryPath, intZipLevel, strPassword, filesOrDirectoriesPaths);

出自：http://www.cnblogs.com/qiuweiguo/archive/2011/08/09/2132061.html