Zip加解压字符串

一、首先下载引用“ICSharpCode.SharpZipLib.dll”

 

二、字符串压缩

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/// <summary>        /// 将传入的二进制字符串资料以Zip算法解压缩        /// </summary>        /// <param name="zippedString">经GZip压缩后的二进制字符串</param>        /// <returns>原始未压缩字符串</returns>        public static string ZipDecompressString(this string zippedString)        {            if (string.IsNullOrEmpty(zippedString) || zippedString.Length == 0)            {                return "";            }            else            {                string dummyData = zippedString;                dummyData = dummyData.Trim().Replace("%", "").Replace(",", "").Replace(" ", "+").Replace("\"", "").Replace("\\n", "");                  //}                byte[] b = Convert.FromBase64String(dummyData);                using (MemoryStream from = new MemoryStream(b))                using (ZipInputStream zip = new ZipInputStream(from))                using (MemoryStream to = new MemoryStream())                {                    ZipEntry entry = zip.GetNextEntry();                    byte[] buffer = new byte[1024];                    int len = 0;                    while ((len = zip.Read(buffer, 0, buffer.Length)) > 0)                    {                        to.Write(buffer, 0, len);                    }                    b = to.ToArray();                    return Encoding.UTF8.GetString(b);                }            }        }

 

三、压缩字符串解压

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/// <summary>         /// 将传入字符串以Zip算法压缩后，返回utf-8格式Base64编码字符         /// </summary>         /// <param name="rawString">需要压缩的字符串</param>         /// <returns>压缩后的Base64编码的字符串</returns>         public static string ZipCompressString(this string rawString)         {             if (string.IsNullOrEmpty(rawString) || rawString.Length == 0)             {                 return "";             }             else             {                 byte[] rawData = System.Text.Encoding.UTF8.GetBytes(rawString);                 using (MemoryStream to = new MemoryStream())                 using (ZipOutputStream zip = new ZipOutputStream(to))                 {                     ZipEntry entry = new ZipEntry("ToBase64String");                     zip.PutNextEntry(entry);                       zip.Write(rawData, 0, rawData.Length);                     zip.CloseEntry();  // 必须，否则报不可预料的压缩文件末端                     zip.Finish();      // 必须，否则报这个压缩文件格式未知或者数据已经被损坏                     return Convert.ToBase64String(to.ToArray());                 }             }         }