Zlib.net官方原始碼demo中提供了壓縮檔案的原始碼演算法。處於專案研發的需要，我需要對記憶體流進行壓縮，由於zlib.net並無相關文字幫助只能自己看原始碼解決。通過對SharpZipLib的demo研究，寫出了Zlib.net的流壓縮演算法。

中間花費了不少的時間，應為通過Stream壓縮出來的資料全是空的，呵呵，主要原因就是忽略了ZOutputStream.flush()和ZOutPutStream.close()方法。大家自己看吧。關於字串壓縮，自然是把字串塞到MemoryStream中就可以了：）

現貼原始碼如下：

現貼原始碼如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Data;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using ComponentAce.Compression.Libs.zlib;

namespace Test.Compress
...{
    /**//// <summary>
    /// Zlib壓縮演算法壓縮應用類
  /// </summary>
    public class ZlibCompress
    ...{
        /**//// <summary>
        /// 拷貝複製流位元組
        /// </summary>
        /// <param name="input"></param>
        /// <param name="output"></param>
        private static void CopyStream(Stream input, Stream output)
        ...{
            byte[] buffer = new byte[ZipConst.ZIP_BUFFER_SIZE];
            int len;
            while ((len = input.Read(buffer, 0, buffer.Length)) > 0)
            ...{
                output.Write(buffer, 0, len);
            }
            output.Flush();
        }

        /**//// <summary>
        /// 壓縮檔案
    /// </summary>
        /// <param name="FileName">被壓縮檔名（必須輸入絕對路徑）</param>
        /// <param name="CompressedFileName">壓縮後儲存的檔名（必須輸入絕對路徑）</param>
        /// <returns></returns>
        public static bool CompressFile(string FileName, string CompressedFileName)
        ...{
            bool bResult = false;

            FileStream outFileStream = new FileStream(CompressedFileName, FileMode.Create);
            ZOutputStream outZStream = new ZOutputStream(outFileStream, zlibConst.Z_DEFAULT_COMPRESSION);
            FileStream inFileStream = new FileStream(FileName, FileMode.Open);
            try
            ...{
                CopyStream(inFileStream, outZStream);
                bResult = true;
            }
            catch
            ...{
                bResult = false;
            }
            finally
            ...{
                outZStream.Close();
                outFileStream.Close();
                inFileStream.Close();
            }
            return bResult;
        }

        /**//// <summary>
        /// 解壓檔案
    /// </summary>
        /// <param name="CompressedFileName">被解壓檔名（必須輸入絕對路徑）</param>
        /// <param name="DecompressFileName">解壓後儲存的檔名（必須輸入絕對路徑）</param>
        /// <returns></returns>
        public static bool DecompressFile(string CompressedFileName, string DecompressFileName)
        ...{
            bool bResult = false;
            FileStream outFileStream = new FileStream(DecompressFileName, FileMode.Create);
            ZOutputStream outZStream = new ZOutputStream(outFileStream);
            FileStream inFileStream = new FileStream(CompressedFileName, FileMode.Open);
            try
            ...{
                CopyStream(inFileStream, outZStream);
                bResult = true;
            }
            catch
            ...{
                bResult = false;
            }
            finally
            ...{
                outZStream.Close();
                outFileStream.Close();
                inFileStream.Close();
            }
            return bResult;
        }

        /**//// <summary>
        /// 壓縮byte陣列資料
    /// </summary>
        /// <param name="SourceByte">需要被壓縮的Byte陣列資料</param>
        /// <returns></returns>
        public static byte[] CompressBytes(byte[] SourceByte)
        ...{
            try
            ...{
                MemoryStream stmInput = new MemoryStream(SourceByte);
                Stream stmOutPut = ZlibCompress.CompressStream(stmInput);
                byte[] bytOutPut = new byte[stmOutPut.Length];
                stmOutPut.Position = 0;
                stmOutPut.Read(bytOutPut, 0, bytOutPut.Length);
                return bytOutPut;
            }
            catch
            ...{
                return null;
            }
        }

        /**//// <summary>
        /// 解壓byte資料資料
    /// </summary>
        /// <param name="SourceByte">需要被解壓的byte陣列資料</param>
        /// <returns></returns>
        public static byte[] DecompressBytes(byte[] SourceByte)
        ...{
            try
            ...{
                MemoryStream stmInput = new MemoryStream(SourceByte);
                Stream stmOutPut = ZlibCompress.DecompressStream(stmInput);
                byte[] bytOutPut = new byte[stmOutPut.Length];
                stmOutPut.Position = 0;
                stmOutPut.Read(bytOutPut, 0, bytOutPut.Length);
                return bytOutPut;
            }
            catch
            ...{
                return null;
            }
        }

        /**//// <summary>
        /// 壓縮流
    /// </summary>
        /// <param name="SourceStream">需要被壓縮的流資料</param>
        /// <returns></returns>
        public static Stream CompressStream(Stream SourceStream)
        ...{
            try
            ...{
                MemoryStream stmOutTemp = new MemoryStream();
                ZOutputStream outZStream = new ZOutputStream(stmOutTemp, zlibConst.Z_DEFAULT_COMPRESSION);
                CopyStream(SourceStream, outZStream);
                outZStream.finish();
                return stmOutTemp;
            }
            catch
            ...{
                return null;
            }
        }

        /**//// <summary>
        /// 解壓流
    /// </summary>
        /// <param name="SourceStream">需要被解縮的流資料</param>
        /// <returns></returns>
        public static Stream DecompressStream(Stream SourceStream)
        ...{
            try
            ...{
                MemoryStream stmOutput = new MemoryStream();
                ZOutputStream outZStream = new ZOutputStream(stmOutput);
                CopyStream(SourceStream, outZStream);
                outZStream.finish();
                return stmOutput;
            }
            catch
            ...{
                return null;
            }
        }

        /**//// <summary>
        /// 壓縮字串
    /// </summary>
        /// <param name="SourceString">需要被壓縮的字串</param>
        /// <returns></returns>
        public static string CompressString(string SourceString)
        ...{
            byte[] byteSource = System.Text.Encoding.UTF8.GetBytes(SourceString);
            byte[] byteCompress = ZlibCompress.CompressBytes(byteSource);
            if (byteCompress != null)
            ...{
                return Convert.ToBase64String(byteCompress);
            }
            else
            ...{
                return null;
            }
        }

        /**//// <summary>
        /// 解壓字串
    /// </summary>
        /// <param name="SourceString">需要被解壓的字串</param>
        /// <returns></returns>
        public static string DecompressString(string SourceString)
        ...{
            byte[] byteSource = Convert.FromBase64String(SourceString);
            byte[] byteDecompress = ZlibCompress.DecompressBytes(byteSource);
            if (byteDecompress != null)
            ...{
                return System.Text.Encoding.UTF8.GetString(byteDecompress);
            }
            else
            ...{
                return null;
            }
        }

    }
}