c#解压文件

 HttpPostedFileBase imgFile = Request.Files[0];//获取到文件流
 filename = imgFile.FileName;
                imgFile.SaveAs(Server.MapPath("../Test/" + filename));//保存到本地
 var archive = ArchiveFactory.Open(Server.MapPath("../Test/" + filename));//通过Server.MapPath找到文件的绝对路径
            foreach (var entry in archive.Entries)
            {
                if (!entry.IsDirectory)//开始解压
                {
                    entry.WriteToDirectory(Server.MapPath("../Test/"), ExtractOptions.ExtractFullPath | ExtractOptions.Overwrite);//解压地址也是要绝对路径的
                }
            }