c# 压缩文件

1、首先下载：ICSharpCode.SharpZipLib.dll
2、代码：
 /// <summary>

        /// 压缩文件

        /// </summary>

        /// <param name="fileName">要压缩的所有文件（完全路径)</param>

        /// <param name="name">压缩后文件路径</param>

        /// <param name="Level">压缩级别</param>

        public void ZipFileMain(string filenames, string name)

        {

            ZipOutputStream s = new ZipOutputStream(File.Create(name));

            Crc32 crc = new Crc32();

            try

            {



                //打开压缩文件

                FileStream fs = File.OpenRead(filenames);



                byte[] buffer = new byte[fs.Length];

                fs.Read(buffer, 0, buffer.Length);



                //建立压缩实体

                ZipEntry entry = new ZipEntry(System.IO.Path.GetFileName(filenames));



                //时间

                entry.DateTime = DateTime.Now;

                //空间大小

                entry.Size = fs.Length;

                fs.Close();

                crc.Reset();

                crc.Update(buffer);

                entry.Crc = crc.Value;

                s.PutNextEntry(entry);

                s.Write(buffer, 0, buffer.Length);



            }

            catch

            {

                throw;

            }

            finally

            {

                s.Finish();

                s.Close();

            }



        }

    }