WP7 压缩文件

         //压缩
        private static void CreateZipFile(string filesPath, string zipFilePath)
        {
            using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
            {
                string[] filenames = isf.GetFileNames(filesPath);
                try
                {
                    using (ZipOutputStream s = new ZipOutputStream(isf.CreateFile(zipFilePath)))
                    {
                        s.SetLevel(9);
                        byte[] buffer = new byte[4096];
                        foreach (string file in filenames)
                        {
                            ZipEntry entry = new ZipEntry(file);
                            entry.DateTime = DateTime.Now;
                            s.PutNextEntry(entry);
                            using (var fs = isf.OpenFile(file, FileMode.OpenOrCreate, FileAccess.Read))
                            {
                                int sourceBytes;
                                do
                                {
                                    sourceBytes = fs.Read(buffer, 0, buffer.Length);
                                    s.Write(buffer, 0, sourceBytes);
                                } while (sourceBytes > 0);
                            }
                        }
                        s.Finish();
                        s.Close();
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }

            }
        }