System.Net命名空间下的FtpWebRequest类实现了ftp协议的.Net实现。

• FtpWebRequest.KeepAlive指定在请求完成后服务器是否要马上关闭连接
• FtpWebRequest.UseBinary 指定文件以二进制方式传输
• FtpWebRequest.Method设置ftp的命令
• WebRequestMethods.Ftp.UploadFile是上传文件的命令

使用FtpWebRequest对象上传文件时，需要向GetRequestStream方法返回的Stream中写入数据。

需要引用如下命名空间

using System.Net;

using System.IO;

FTP上传文件代码实现：

public void ftpfile(string ftpfilepath, string inputfilepath)

{

    string ftphost = "127.0.0.1";

    //here correct hostname or IP of the ftp server to be given  

    string ftpfullpath = "ftp://" + ftphost + ftpfilepath;

    FtpWebRequest ftp = (FtpWebRequest)FtpWebRequest.Create(ftpfullpath);

    ftp.Credentials = new NetworkCredential("userid", "password");

    //userid and password for the ftp server to given  

    ftp.KeepAlive = true;

    ftp.UseBinary = true;

    ftp.Method = WebRequestMethods.Ftp.UploadFile;

    FileStream fs = File.OpenRead(inputfilepath);

    byte[] buffer = new byte[fs.Length];

    fs.Read(buffer, 0, buffer.Length);

    fs.Close();

    Stream ftpstream = ftp.GetRequestStream();

    ftpstream.Write(buffer, 0, buffer.Length);

    ftpstream.Close();

}

调用方法：

ftpfile(@"/testfolder/testfile.xml", @"c:\testfile.xml");