C# 遍历FTP文件夹/下载
原文链接:http://blog.iyunv.com/ou8811/article/details/5295780整个程序大致可以分为2个部分,第一部分是实现单个文件下载的方法
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[*]/// <summary>
[*]/// 单个文件下载方法
[*] /// </summary>
[*]/// <param name="adss">保存文件的本地路径</param>
[*]/// <param name="ftpadss">下载文件的FTP路径</param>
[*]public void download(string adss, string ftpadss)
[*]{
[*] //FileMode常数确定如何打开或创建文件,指定操作系统应创建新文件。
[*] //FileMode.Create如果文件已存在，它将被改写
[*] FileStream outputStream = new FileStream(adss, FileMode.Create);
[*] FtpWebRequest downRequest = (FtpWebRequest)WebRequest.Create(new Uri(ftpadss));
[*] //设置要发送到 FTP 服务器的命令
[*] downRequest.Method = WebRequestMethods.Ftp.DownloadFile;
[*] FtpWebResponse response = (FtpWebResponse)downRequest.GetResponse();
[*] Stream ftpStream = response.GetResponseStream();
[*] long cl = response.ContentLength;
[*] int bufferSize = 2048;
[*] int readCount;
[*] byte[] buffer = new byte;
[*] readCount = ftpStream.Read(buffer, 0, bufferSize);
[*] while (readCount > 0)
[*] {
[*] outputStream.Write(buffer, 0, readCount);
[*] readCount = ftpStream.Read(buffer, 0, bufferSize);
[*] }
[*] ftpStream.Close();
[*] outputStream.Close();
[*] response.Close();
[*]}
第二个部分也就是需要遍历出我们所指定的文件夹内所有内容
首先是一个单个遍历文件夹获取文件夹下所有文件信息的方法
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[*]/// </summary>
[*]/// <param name="ftpads">FTP地址路径</param>
[*]/// <param name="name">我们所选择的文件或者文件夹名字</param>
[*]/// <param name="type">要发送到FTP服务器的命令</param>
[*]/// <returns></returns>
[*]public string[] ftp(string ftpads,string name,string type)
[*]{
[*] WebResponse webresp = null;
[*] StreamReader ftpFileListReader = null;
[*] FtpWebRequest ftpRequest=null;
[*] try
[*] {
[*] ftpRequest = (FtpWebRequest)WebRequest.Create(new Uri(ftpads + name));
[*] ftpRequest.Method = type;
[*] webresp = ftpRequest.GetResponse();
[*] ftpFileListReader = new StreamReader(webresp.GetResponseStream(), Encoding.Default);
[*] }
[*] catch(Exception ex)
[*] {
[*] ex.ToString();
[*]
[*] }
[*] StringBuilder str = new StringBuilder();
[*] string line=ftpFileListReader.ReadLine();
[*] while (line != null)
[*] {
[*] str.Append(line);
[*] str.Append("/n");
[*] line = ftpFileListReader.ReadLine();
[*] }
[*] string[] fen = str.ToString().Split('/n');
[*] return fen;
[*]}
之后是一个我们实现递归文件夹的方法
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[*]/// <summary>
[*]/// 下载方法KO
[*]/// </summary>
[*]/// <param name="ftpads">FTP路径</param>
[*]/// <param name="name">需要下载文件路径</param>
[*]/// <param name="Myads">保存的本地路径</param>
[*]public void downftp(string ftpads, string name,string Myads)
[*]{
[*] string downloadDir = Myads + name;
[*] string ftpdir = ftpads + name;
[*] string[] fullname = ftp(ftpads, name, WebRequestMethods.Ftp.ListDirectoryDetails);
[*] //判断是否为单个文件
[*] if (fullname.Length <= 2)
[*] {
[*] if (fullname == "")
[*] {
[*] download(downloadDir + "/" + name, ftpads + name + "/" + name);
[*] }
[*] }
[*] else
[*] {
[*] string[] onlyname = ftp(ftpads, name, WebRequestMethods.Ftp.ListDirectory);
[*] if (!Directory.Exists(downloadDir))
[*] {
[*] Directory.CreateDirectory(downloadDir);
[*] }
[*] foreach (string names in fullname)
[*] {
[*] //判断是否具有文件夹标识<DIR>
[*] if (names.Contains("<DIR>"))
[*] {
[*] string olname = names.Split(new string[] { "<DIR>" },
[*] StringSplitOptions.None).Trim();
[*] downftp(ftpdir, "//" + olname, downloadDir);
[*] }
[*] else
[*] {
[*] foreach (string onlynames in onlyname)
[*] {
[*] if (onlynames == "" || onlynames == " " || names == "")
[*] {
[*] break;
[*] }
[*] else
[*] {
[*] if (names.Contains(" " + onlynames))
[*] {
[*] download(downloadDir + "/" + onlynames, ftpads + name + "/" +
[*] onlynames);
[*] break;
[*] }
[*] }
[*] }
[*] }
[*] }
[*] }
[*]
[*]}
在使用WebRequestMethods.Ftp.ListDirectoryDetails取得文件夹下所有内容时，会发现如果其中有文件夹，那么文件夹的的详细信息中会有一个"<DIR>"标识，我们就可以通过这个来将其区分开来
同时在获取文件夹以及文件名称时用到WebRequestMethods.Ftp.ListDirectory，这个指令能过只获得文件夹下所有文件包括文件夹的名字，通过这两个指令所获取的信息逐一比较，便能确定出文件或文件夹名以传递到download和downftp方法中
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