本文實例為大家分享了C# FTP操作類的具體代碼，可進行FTP的上傳，下載等其他功能，支持斷點續傳，供大家參考，具體內容如下
FTPHelper
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
namespace ManagementProject
{
public class FTPHelper
{
string ftpRemotePath;
#region 變量屬性
/// <summary>
/// Ftp服務器ip
/// </summary>
public static string FtpServerIP = "";
/// <summary>
/// Ftp 指定用戶名
/// </summary>
public static string FtpUserID = "";
/// <summary>
/// Ftp 指定用戶密碼
/// </summary>
public static string FtpPassword = "";
public static string ftpURI = "ftp://" + FtpServerIP + "/";
#endregion
#region 從FTP服務器下載文件，指定本地路徑和本地文件名
/// <summary>
/// 從FTP服務器下載文件，指定本地路徑和本地文件名
/// </summary>
/// <param name="remoteFileName">遠程文件名</param>
/// <param name="localFileName">保存本地的文件名（包含路徑）</param>
/// <param name="ifCredential">是否啟用身份驗證（false：表示允許用戶匿名下載）</param>
/// <param name="updateProgress">報告進度的處理(第一個參數：總大小，第二個參數：當前進度)</param>
/// <returns>是否下載成功</returns>
public static bool FtpDownload(string remoteFileName, string localFileName, bool ifCredential, Action<int, int> updateProgress = null)
{
FtpWebRequest reqFTP, ftpsize;
Stream ftpStream = null;
FtpWebResponse response = null;
FileStream outputStream = null;
try
{
outputStream = new FileStream(localFileName, FileMode.Create);
if (FtpServerIP == null || FtpServerIP.Trim().Length == 0)
{
throw new Exception("ftp下載目標服務器地址未設置！");
}
Uri uri = new Uri("ftp://" + FtpServerIP + "/" + remoteFileName);
ftpsize = (FtpWebRequest)FtpWebRequest.Create(uri);
ftpsize.UseBinary = true;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);
reqFTP.UseBinary = true;
reqFTP.KeepAlive = false;
if (ifCredential)//使用用戶身份認證
{
ftpsize.Credentials = new NetworkCredential(FtpUserID, FtpPassword);
reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);
}
ftpsize.Method = WebRequestMethods.Ftp.GetFileSize;
FtpWebResponse re = (FtpWebResponse)ftpsize.GetResponse();
long totalBytes = re.ContentLength;
re.Close();
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
response = (FtpWebResponse)reqFTP.GetResponse();
ftpStream = response.GetResponseStream();
//更新進度
if (updateProgress != null)
{
updateProgress((int)totalBytes, 0);//更新進度條
}
long totalDownloadedByte = 0;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
totalDownloadedByte = readCount + totalDownloadedByte;
outputStream.Write(buffer, 0, readCount);
//更新進度
if (updateProgress != null)
{
updateProgress((int)totalBytes, (int)totalDownloadedByte);//更新進度條
}
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
return true;
}
catch (Exception ex)
{
return false;
throw;
}
finally
{
if (ftpStream != null)
{
ftpStream.Close();
}
if (outputStream != null)
{
outputStream.Close();
}
if (response != null)
{
response.Close();
}
}
}
/// <summary>
/// 從FTP服務器下載文件，指定本地路徑和本地文件名（支持斷點下載）
/// </summary>
/// <param name="remoteFileName">遠程文件名</param>
/// <param name="localFileName">保存本地的文件名（包含路徑）</param>
/// <param name="ifCredential">是否啟用身份驗證（false：表示允許用戶匿名下載）</param>
/// <param name="size">已下載文件流大小</param>
/// <param name="updateProgress">報告進度的處理(第一個參數：總大小，第二個參數：當前進度)</param>
/// <returns>是否下載成功</returns>
public static bool FtpBrokenDownload(string remoteFileName, string localFileName, bool ifCredential, long size, Action<int, int> updateProgress = null)
{
FtpWebRequest reqFTP, ftpsize;
Stream ftpStream = null;
FtpWebResponse response = null;
FileStream outputStream = null;
try
{
outputStream = new FileStream(localFileName, FileMode.Append);
if (FtpServerIP == null || FtpServerIP.Trim().Length == 0)
{
throw new Exception("ftp下載目標服務器地址未設置！");
}
Uri uri = new Uri("ftp://" + FtpServerIP + "/" + remoteFileName);
ftpsize = (FtpWebRequest)FtpWebRequest.Create(uri);
ftpsize.UseBinary = true;
ftpsize.ContentOffset = size;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);
reqFTP.UseBinary = true;
reqFTP.KeepAlive = false;
reqFTP.ContentOffset = size;
if (ifCredential)//使用用戶身份認證
{
ftpsize.Credentials = new NetworkCredential(FtpUserID, FtpPassword);
reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);
}
ftpsize.Method = WebRequestMethods.Ftp.GetFileSize;
FtpWebResponse re = (FtpWebResponse)ftpsize.GetResponse();
long totalBytes = re.ContentLength;
re.Close();
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
response = (FtpWebResponse)reqFTP.GetResponse();
ftpStream = response.GetResponseStream();
//更新進度
if (updateProgress != null)
{
updateProgress((int)totalBytes, 0);//更新進度條
}
long totalDownloadedByte = 0;
int bufferSize = 2048;
int readCount;
byte[] buffer = new byte[bufferSize];
readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
totalDownloadedByte = readCount + totalDownloadedByte;
outputStream.Write(buffer, 0, readCount);
//更新進度
if (updateProgress != null)
{
updateProgress((int)totalBytes, (int)totalDownloadedByte);//更新進度條
}
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
ftpStream.Close();
outputStream.Close();
response.Close();
return true;
}
catch (Exception ex)
{
return false;
throw;
}
finally
{
if (ftpStream != null)
{
ftpStream.Close();
}
if (outputStream != null)
{
outputStream.Close();
}
if (response != null)
{
response.Close();
}
}
}
/// <summary>
/// 從FTP服務器下載文件，指定本地路徑和本地文件名
/// </summary>
/// <param name="remoteFileName">遠程文件名</param>
/// <param name="localFileName">保存本地的文件名（包含路徑）</param>
/// <param name="ifCredential">是否啟用身份驗證（false：表示允許用戶匿名下載）</param>
/// <param name="updateProgress">報告進度的處理(第一個參數：總大小，第二個參數：當前進度)</param>
/// <param name="brokenOpen">是否斷點下載：true 會在localFileName 找是否存在已經下載的文件，并計算文件流大小</param>
/// <returns>是否下載成功</returns>
public static bool FtpDownload(string remoteFileName, string localFileName, bool ifCredential, bool brokenOpen, Action<int, int> updateProgress = null)
{
if (brokenOpen)
{
try
{
long size = 0;
if (File.Exists(localFileName))
{
using (FileStream outputStream = new FileStream(localFileName, FileMode.Open))
{
size = outputStream.Length;
}
}
return FtpBrokenDownload(remoteFileName, localFileName, ifCredential, size, updateProgress);
}
catch
{
throw;
}
}
else
{
return FtpDownload(remoteFileName, localFileName, ifCredential, updateProgress);
}
}
#endregion
#region 上傳文件到FTP服務器
/// <summary>
/// 上傳文件到FTP服務器
/// </summary>
/// <param name="localFullPath">本地帶有完整路徑的文件名</param>
/// <param name="updateProgress">報告進度的處理(第一個參數：總大小，第二個參數：當前進度)</param>
/// <returns>是否下載成功</returns>
public static bool FtpUploadFile(string localFullPathName, Action<int, int> updateProgress = null)
{
FtpWebRequest reqFTP;
Stream stream = null;
FtpWebResponse response = null;
FileStream fs = null;
try
{
FileInfo finfo = new FileInfo(localFullPathName);
if (FtpServerIP == null || FtpServerIP.Trim().Length == 0)
{
throw new Exception("ftp上傳目標服務器地址未設置！");
}
Uri uri = new Uri("ftp://" + FtpServerIP + "/" + finfo.Name);
reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);
reqFTP.KeepAlive = false;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);//用戶，密碼
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;//向服務器發出下載請求命令
reqFTP.ContentLength = finfo.Length;//為request指定上傳文件的大小
response = reqFTP.GetResponse() as FtpWebResponse;
reqFTP.ContentLength = finfo.Length;
int buffLength = 1024;
byte[] buff = new byte[buffLength];
int contentLen;
fs = finfo.OpenRead();
stream = reqFTP.GetRequestStream();
contentLen = fs.Read(buff, 0, buffLength);
int allbye = (int)finfo.Length;
//更新進度
if (updateProgress != null)
{
updateProgress((int)allbye, 0);//更新進度條
}
int startbye = 0;
while (contentLen != 0)
{
startbye = contentLen + startbye;
stream.Write(buff, 0, contentLen);
//更新進度
if (updateProgress != null)
{
updateProgress((int)allbye, (int)startbye);//更新進度條
}
contentLen = fs.Read(buff, 0, buffLength);
}
stream.Close();
fs.Close();
response.Close();
return true;
}
catch (Exception ex)
{
return false;
throw;
}
finally
{
if (fs != null)
{
fs.Close();
}
if (stream != null)
{
stream.Close();
}
if (response != null)
{
response.Close();
}
}
}
/// <summary>
/// 上傳文件到FTP服務器(斷點續傳)
/// </summary>
/// <param name="localFullPath">本地文件全路徑名稱：C:\Users\JianKunKing\Desktop\IronPython腳本測試工具</param>
/// <param name="remoteFilepath">遠程文件所在文件夾路徑</param>
/// <param name="updateProgress">報告進度的處理(第一個參數：總大小，第二個參數：當前進度)</param>
/// <returns></returns>
public static bool FtpUploadBroken(string localFullPath, string remoteFilepath, Action<int, int> updateProgress = null)
{
if (remoteFilepath == null)
{
remoteFilepath = "";
}
string newFileName = string.Empty;
bool success = true;
FileInfo fileInf = new FileInfo(localFullPath);
long allbye = (long)fileInf.Length;
if (fileInf.Name.IndexOf("#") == -1)
{
newFileName = RemoveSpaces(fileInf.Name);
}
else
{
newFileName = fileInf.Name.Replace("#", "＃");
newFileName = RemoveSpaces(newFileName);
}
long startfilesize = GetFileSize(newFileName, remoteFilepath);
if (startfilesize >= allbye)
{
return false;
}
long startbye = startfilesize;
//更新進度
if (updateProgress != null)
{
updateProgress((int)allbye, (int)startfilesize);//更新進度條
}
string uri;
if (remoteFilepath.Length == 0)
{
uri = "ftp://" + FtpServerIP + "/" + newFileName;
}
else
{
uri = "ftp://" + FtpServerIP + "/" + remoteFilepath + "/" + newFileName;
}
FtpWebRequest reqFTP;
// 根據uri創建FtpWebRequest對象
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// ftp用戶名和密碼
reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);
// 默認為true，連接不會被關閉
// 在一個命令之后被執行
reqFTP.KeepAlive = false;
// 指定執行什么命令
reqFTP.Method = WebRequestMethods.Ftp.AppendFile;
// 指定數據傳輸類型
reqFTP.UseBinary = true;
// 上傳文件時通知服務器文件的大小
reqFTP.ContentLength = fileInf.Length;
int buffLength = 2048;// 緩沖大小設置為2kb
byte[] buff = new byte[buffLength];
// 打開一個文件流 (System.IO.FileStream) 去讀上傳的文件
FileStream fs = fileInf.OpenRead();
Stream strm = null;
try
{
// 把上傳的文件寫入流
strm = reqFTP.GetRequestStream();
// 每次讀文件流的2kb
fs.Seek(startfilesize, 0);
int contentLen = fs.Read(buff, 0, buffLength);
// 流內容沒有結束
while (contentLen != 0)
{
// 把內容從file stream 寫入 upload stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
startbye += contentLen;
//更新進度
if (updateProgress != null)
{
updateProgress((int)allbye, (int)startbye);//更新進度條
}
}
// 關閉兩個流
strm.Close();
fs.Close();
}
catch
{
success = false;
throw;
}
finally
{
if (fs != null)
{
fs.Close();
}
if (strm != null)
{
strm.Close();
}
}
return success;
}
/// <summary>
/// 去除空格
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
private static string RemoveSpaces(string str)
{
string a = "";
CharEnumerator CEnumerator = str.GetEnumerator();
while (CEnumerator.MoveNext())
{
byte[] array = new byte[1];
array = System.Text.Encoding.ASCII.GetBytes(CEnumerator.Current.ToString());
int asciicode = (short)(array[0]);
if (asciicode != 32)
{
a += CEnumerator.Current.ToString();
}
}
string sdate = System.DateTime.Now.Year.ToString() + System.DateTime.Now.Month.ToString() + System.DateTime.Now.Day.ToString() + System.DateTime.Now.Hour.ToString()
+ System.DateTime.Now.Minute.ToString() + System.DateTime.Now.Second.ToString() + System.DateTime.Now.Millisecond.ToString();
return a.Split('.')[a.Split('.').Length - 2] + "." + a.Split('.')[a.Split('.').Length - 1];
}
/// <summary>
/// 獲取已上傳文件大小
/// </summary>
/// <param name="filename">文件名稱</param>
/// <param name="path">服務器文件路徑</param>
/// <returns></returns>
public static long GetFileSize(string filename, string remoteFilepath)
{
long filesize = 0;
try
{
FtpWebRequest reqFTP;
FileInfo fi = new FileInfo(filename);
string uri;
if (remoteFilepath.Length == 0)
{
uri = "ftp://" + FtpServerIP + "/" + fi.Name;
}
else
{
uri = "ftp://" + FtpServerIP + "/" + remoteFilepath + "/" + fi.Name;
}
reqFTP = (FtpWebRequest)FtpWebRequest.Create(uri);
reqFTP.KeepAlive = false;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(FtpUserID, FtpPassword);//用戶，密碼
reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
filesize = response.ContentLength;
return filesize;
}
catch
{
return 0;
}
}
//public void Connect(String path, string ftpUserID, string ftpPassword)//連接ftp
//{
// // 根據uri創建FtpWebRequest對象
// reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
// // 指定數據傳輸類型
// reqFTP.UseBinary = true;
// // ftp用戶名和密碼
// reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
/
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