10.2. 二进制（字节）数据存为文件:saveBytesToFile

10.2. 二进制（字节）数据存为文件:saveBytesToFile
	第 10 章 crifanLib.cs之File/Folder


    //save binary bytes into file
    public bool saveBytesToFile(string fileToSave, ref Byte[] bytes, int dataLen, out string errStr)
    {
        bool saveOk = false;
        errStr = "未知错误！";

        try
        {
            int bufStartPos = 0;
            int bytesToWrite = dataLen;

            FileStream fs;
            fs = File.Create(fileToSave, bytesToWrite);
            fs.Write(bytes, bufStartPos, bytesToWrite);
            fs.Close();

            saveOk = true;
        }
        catch (Exception ex)
        {
            errStr = ex.Message;
        }

        return saveOk;
    }

例 10.2. saveBytesToFile 的使用范例


        public bool downloadStMusicFile(string musicRealAddr, string fullnameToStore, out string errStr, Action<int> funcUpdateProgress)
        {
            bool downloadOk = false;
            errStr = "未知错误！";

            if (musicRealAddr == null || 
                musicRealAddr == "" ||
                fullnameToStore == null ||
                fullnameToStore == "")
            {
                errStr = "Songtaste歌曲真实的地址无效！";
                return downloadOk;
            }
            
            Dictionary<string, string> headerDict = new Dictionary<string, string>();
            //headerDict.Add("Referer", "http://songtaste.com/music/");
            headerDict.Add("Referer", "http://songtaste.com/");

            //const int maxMusicFileLen = 100 * 1024 * 1024; // 100M
            const int maxMusicFileLen = 300 * 1024 * 1024; // 300M
            Byte[] binDataBuf = new Byte[maxMusicFileLen];

            int respDataLen = crl.getUrlRespStreamBytes(ref binDataBuf, musicRealAddr, headerDict, null, 0, funcUpdateProgress);
            if (respDataLen < 0)
            {
                errStr = "无法读取歌曲数据！";
                return downloadOk;
            }

            if (crl.saveBytesToFile(fullnameToStore, ref binDataBuf, respDataLen, out errStr))
            {
                downloadOk = true;
            }


第 10 章 crifanLib.cs之File/Folder		10.3. （从网络上）下载文件（到本地）:downloadFile