using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ICSharpCode.SharpZipLib.Zip;
using System.IO;

namespace UAS_MES.PublicMethod
{
    class ZipHelper
    {
        /// <summary>
        /// 用于解压缩Zip文件
        /// </summary>
        /// <param name="ZipFilePath"></param>
        /// <param name="UnZipPath"></param>
        public static void UnZip(string ZipFilePath, string UnZipPath)
        {
            if (!File.Exists(ZipFilePath))
            {
                throw new FileNotFoundException(string.Format("未能找到文件 '{0}' ", ZipFilePath));
            }

            if (!Directory.Exists(UnZipPath))
            {
                Directory.CreateDirectory(UnZipPath);
            }

            using (var s = new ZipInputStream(File.OpenRead(ZipFilePath)))
            {
                ZipEntry theEntry;
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    if (theEntry.IsDirectory)
                    {
                        continue;
                    }
                    string directorName = Path.Combine(UnZipPath, Path.GetDirectoryName(theEntry.Name));
                    string fileName = Path.Combine(directorName, Path.GetFileName(theEntry.Name));
                    if (!Directory.Exists(directorName))
                    {
                        Directory.CreateDirectory(directorName);
                    }
                    if (!String.IsNullOrEmpty(fileName))
                    {
                        using (FileStream streamWriter = File.Create(fileName))
                        {
                            int size = 4096;
                            byte[] data = new byte[size];
                            while (size > 0)
                            {
                                size = s.Read(data, 0, data.Length);
                                streamWriter.Write(data, 0, size);
                            }
                        }
                    }
                }
            }
        }
    }
}