C#中FTP上传下载

C#中FTP上传下载

using System;

using System.Collections.Generic;

using System.Web;

using System.Net;

using System.IO;

 namespace His.WebService.Utility

{

    public class FtpHelper

    { 

        /// <summary>

        /// ftp方式上传 

        /// </summary>

        public static int UploadFtp(string filePath, string filename, string ftpServerIP, string ftpUserID, string ftpPassword)

        {

            FileInfo fileInf = new FileInfo(filePath + "\\" + filename);

            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

            FtpWebRequest reqFTP;

            // Create FtpWebRequest object from the Uri provided 

            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));

            try

            {

                // Provide the WebPermission Credintials 

                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

                // By default KeepAlive is true, where the control connection is not closed 

                // after a command is executed. 

                reqFTP.KeepAlive = false;

                // Specify the command to be executed. 

                reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

                // Specify the data transfer type. 

                reqFTP.UseBinary = true;

                // Notify the server about the size of the uploaded file 

                reqFTP.ContentLength = fileInf.Length;

                // The buffer size is set to 2kb 

                int buffLength = 2048;

                byte[] buff = new byte[buffLength];

                int contentLen;

                // Opens a file stream (System.IO.FileStream) to read the file to be uploaded 

                //FileStream fs = fileInf.OpenRead(); 

                FileStream fs = fileInf.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

                // Stream to which the file to be upload is written 

                Stream strm = reqFTP.GetRequestStream();

                // Read from the file stream 2kb at a time 

                contentLen = fs.Read(buff, 0, buffLength);

                // Till Stream content ends 

                while (contentLen != 0)

                {

                    // Write Content from the file stream to the FTP Upload Stream 

                    strm.Write(buff, 0, contentLen);

                    contentLen = fs.Read(buff, 0, buffLength);

                }

                // Close the file stream and the Request Stream 

                strm.Close();

                fs.Close();

                return 0;

            }

            catch (Exception ex)

            {

                reqFTP.Abort();

                //  Logging.WriteError(ex.Message + ex.StackTrace);

                return -2;

            }

        }

        /// <summary>

        /// ftp方式下载 

        /// </summary>

        public static int DownloadFtp(string filePath, string fileName, string ftpServerIP, string ftpUserID, string ftpPassword)

        {

            FtpWebRequest reqFTP;

            try

            {

                //filePath = < <The full path where the file is to be created.>>, 

                //fileName = < <Name of the file to be created(Need not be the name of the file on FTP server).>> 

                FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);

                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));

                reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;

                reqFTP.UseBinary = true;

                reqFTP.KeepAlive = false;

                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

                Stream ftpStream = response.GetResponseStream();

                long cl = response.ContentLength;

                int bufferSize = 2048;

                int readCount;

                byte[] buffer = new byte[bufferSize];

                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();

                return 0;

            }

            catch (Exception ex)

            {

                // Logging.WriteError(ex.Message + ex.StackTrace);

                // System.Windows.Forms.MessageBox.Show(ex.Message);

                return -2;

            }

        }

    }

}