C#中FTPS的文件上传和下载方法是什么

在C＃中，可以使用FtpWebRequest类来进行FTP文件上传和下载。以下是一个简单的例子：

文件上传：

string ftpServerIP = "ftp://ftp.example.com/"; string ftpUsername = "username"; string ftpPassword = "password";  string filePath = "localfile.txt"; string ftpPath = "remotefile.txt";  FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpServerIP + ftpPath); request.Method = WebRequestMethods.Ftp.UploadFile; request.Credentials = new NetworkCredential(ftpUsername, ftpPassword);  using (FileStream fileStream = File.OpenRead(filePath)) using (Stream ftpStream = request.GetRequestStream()) {     fileStream.CopyTo(ftpStream); } 

文件下载：

string ftpServerIP = "ftp://ftp.example.com/"; string ftpUsername = "username"; string ftpPassword = "password";  string ftpPath = "remotefile.txt"; string filePath = "localfile.txt";  FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftpServerIP + ftpPath); request.Method = WebRequestMethods.Ftp.DownloadFile; request.Credentials = new NetworkCredential(ftpUsername, ftpPassword);  using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) using (Stream ftpStream = response.GetResponseStream()) using (FileStream fileStream = File.Create(filePath)) {     ftpStream.CopyTo(fileStream); } 

请注意，这些代码示例中的FTP服务器的URL、用户名和密码应更改为实际的值。