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c#打包文件解压缩的实例

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c#打包文件解压缩的实例

首先要引用一下类库：using ionic.zip;这个类库可以到网上下载。

下面对类库使用的封装方法：

得到指定的输入流的zip压缩流对象

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/// <summary>
      /// 得到指定的输入流的zip压缩流对象【原有流对象不会改变】
      /// </summary>
      /// <param name="sourcestream"></param>
      /// <returns></returns>
      public static stream zipcompress(stream sourcestream, string entryname = "zip")
      {
        memorystream compressedstream = new memorystream();
        if (sourcestream != null)
        {
          long sourceoldposition = 0;
          try
          {
            sourceoldposition = sourcestream.position;
            sourcestream.position = 0;
            using (zipfile zip = new zipfile())
            {
              zip.addentry(entryname, sourcestream);
              zip.save(compressedstream);
              compressedstream.position = 0;
            }
          }
          catch
          {
          }
          finally
          {
            try
            {
              sourcestream.position = sourceoldposition;
            }
            catch
            {
            }
          }
        }
        return compressedstream;
      }

得到指定的字节数组的zip解压流对象

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/// <summary>
      /// 得到指定的字节数组的zip解压流对象
      /// 当前方法仅适用于只有一个压缩文件的压缩包，即方法内只取压缩包中的第一个压缩文件
      /// </summary>
      /// <param name="sourcestream"></param>
      /// <returns></returns>
      public static stream zipdecompress(byte[] data)
      {
        stream decompressedstream = new memorystream();
        if (data != null)
        {
          try
          {
            memorystream datastream = new memorystream(data);
            using (zipfile zip = zipfile.read(datastream))
            {
              if (zip.entries.count > 0)
              {
                zip.entries.first().extract(decompressedstream);
                // extract方法中会操作ms，后续使用时必须先将stream位置归零，否则会导致后续读取不到任何数据
                // 返回该stream对象之前进行一次位置归零动作
                decompressedstream.position = 0;
              }
            }
          }
          catch
          {
          }
        }
        return decompressedstream;
      }

压缩zip文件

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/// <summary>
      /// 压缩zip文件
      /// 支持多文件和多目录，或是多文件和多目录一起压缩
      /// </summary>
      /// <param name="list">待压缩的文件或目录集合</param>
      /// <param name="strzipname">压缩后的文件名</param>
      /// <param name="isdirstruct">是否按目录结构压缩</param>
      /// <returns>成功：true/失败：false</returns>
      public static bool compressmulti(list<string> list, string strzipname, bool isdirstruct)
      {
        try
        {
          using (zipfile zip = new zipfile(encoding.default))//设置编码，解决压缩文件时中文乱码
          {
            foreach (string path in list)
            {
              string filename = path.getfilename(path);//取目录名称
              //如果是目录
              if (directory.exists(path))
              {
                if (isdirstruct)//按目录结构压缩
                {
                  zip.adddirectory(path, filename);
                }
                else//目录下的文件都压缩到zip的根目录
                {
                  zip.adddirectory(path);
                }
              }
              if (file.exists(path))//如果是文件
              {
                zip.addfile(path,"imges");
              }
            }
            zip.save(strzipname);//压缩
            return true;
          }
        }
        catch (exception)
        {
          return false;
        }
      }

解压zip文件

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/// <summary>
      /// 解压zip文件
      /// </summary>
      /// <param name="strzippath">待解压的zip文件</param>
      /// <param name="strunzippath">解压的目录</param>
      /// <param name="overwrite">是否覆盖</param>
      /// <returns>成功：true/失败：false</returns>
      public static bool decompression(string strzippath, string strunzippath, bool overwrite)
      {
        try
        {
          readoptions options = new readoptions();
          options.encoding = encoding.default;//设置编码，解决解压文件时中文乱码
          using (zipfile zip = zipfile.read(strzippath, options))
          {
            foreach (zipentry entry in zip)
            {
              if (string.isnullorempty(strunzippath))
              {
                strunzippath = strzippath.split('.').first();
              }
              if (overwrite)
              {
                entry.extract(strunzippath, extractexistingfileaction.overwritesilently);//解压文件，如果已存在就覆盖
              }
              else
              {
                entry.extract(strunzippath, extractexistingfileaction.donotoverwrite);//解压文件，如果已存在不覆盖
              }
            }
            return true;
          }
        }
        catch (exception)
        {
          return false;
        }
      }

c#打包文件解压缩的实例

以上动图由“图斗罗”提供

这篇c#打包文件解压缩的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持米米素材网。

原文链接：http://www.cnblogs.com/ldyblogs/archive/2017/11/21/package.html