C#相关FTP操作

C# 相关 FTP（File Transfer Protocol） 操作

1.获取文件目录

UsePassive：需要设置为false。 使用被动模式，因为客户端防火墙的存在，所以为了确保数据可以正常传输，所有采用被动模式。

UseBinary：指示文件的传输类型，true 指示二进制数据，false指示数据为为本，默认为true。

    /// <summary>  
    /// 根据ftp路径返回目录下的文件名称
    /// </summary>  
    public string[] GetFilesDetailList(string path)
    {	
        List<string> listFileNames = new List<string>();
        FtpWebRequest ftp;
        ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
        ftp.UsePassive = false;
        //ftp.UseBinary = true;
        ftp.Credentials = new NetworkCredential("Skills", "Skills"); //用户名密码
        ftp.Method = WebRequestMethods.Ftp.ListDirectory; //只带文件名

        var stream = ftp.GetResponse().GetResponseStream();

        StreamReader reader = new StreamReader(stream);
        string line;
        while ((line = reader.ReadLine()) != null)
        {
            listFileNames.Add(line);
        }
        reader.Close();
        return listFileNames.ToArray();
    }

2.下载文件

    /// <summary>  
    /// 下载文件
    /// </summary>  
    public void DownloadFile(string filePath)
    {
        FtpWebRequest ftp;
        ftp = (FtpWebRequest)FtpWebRequest.Create(new Uri(filePath));
        ftp.UsePassive = false;
        ftp.UseBinary = true;
        ftp.Credentials = new NetworkCredential("Skills", "Skills"); //用户名密码
        ftp.Method = WebRequestMethods.Ftp.DownloadFile;
        Stream stream = ftp.GetResponse().GetResponseStream();

        //Save file
        string fileName = Path.GetFileName(filePath);
        FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate);
        int bufferSize = 1024;
        byte[] buffer = new byte[bufferSize];
        int readCount = stream.Read(buffer, 0, bufferSize);
        while (readCount > 0)
        {
            fs.Write(buffer, 0, readCount);
            readCount = stream.Read(buffer, 0, bufferSize);
        }
        fs.Close();
        stream.Close();
    }

3.获取文件大小

        /// <summary>  
        /// 获取指定文件大小  
        /// </summary>  
        public long GetFileSize(string filename)
        {
            FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(filename));
            reqFTP.Method = WebRequestMethods.Ftp.GetFileSize; //获取文件大小
            reqFTP.UseBinary = true;
            reqFTP.Credentials = new NetworkCredential("Skills", "Skills");
            return reqFTP.GetResponse().ContentLength;
        }

学习自：https://www.cnblogs.com/rushme/p/6690912.html