C#ZIP解压到指定路径

2016-10-18 11:10 Moon-明月阅读(882) 评论(0) 编辑收藏举报
 /// <summary>
        /// 解压文件
        /// </summary>
        /// <param name="zipFilePath">压缩文件所在目录</param>
        ///  <param name="unzippath">解压文件所在目录</param>
        private bool UnZipFile(string zipFilePath, string unzippath)
        {
            try
            {
                ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath));
                ZipEntry theEntry;
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    string directoryName = Path.GetDirectoryName(unzippath);
                    string fileName = Path.GetFileName(theEntry.Name);

                    //生成解压目录

                    Directory.CreateDirectory(directoryName);

                    if (fileName != String.Empty)
                    {
                        //如果文件的压缩后大小为0那么说明这个文件是空的,因此不需要进行读出写入

                        if (theEntry.CompressedSize == 0)
                            break;
                        //解压文件到指定的目录

                        directoryName = Path.GetDirectoryName(unzippath + "\\" + theEntry.Name);
                        //建立下面的目录和子目录

                        Directory.CreateDirectory(directoryName);

                        FileStream streamWriter = File.Create(unzippath + "\\" + theEntry.Name);

                        int size = 2048;
                        byte[] data = new byte[2048];
                        while (true)
                        {
                            size = s.Read(data, 0, data.Length);
                            if (size > 0)
                            {
                                streamWriter.Write(data, 0, size);
                            }
                            else
                            {
                                break;
                            }
                        }
                        streamWriter.Close();
                    }
                }
                s.Close();
                return true;
            }
            catch (Exception ex)
            {
                FrmReadFileToPDF.cs.ErrorLog.WriteError("解压文件发生异常：" + ex.ToString());
                return false;
            }
            //strJYtime = (DateTime.Now - dt_start).ToString();
            //MessageBox.Show("解压时间："+strJYtime);
        }