C#如何操控FTP，獲取FTP檔案或資料夾列表，獲取FTP檔案大小，FTP上傳，FTP刪除檔案，FTP新建資料夾、刪除資料夾
阿新 • • 發佈：2018-11-21
C#如何操控FTP
出處：http://www.cnblogs.com/rond/archive/2012/07/30/2611295.html，http://www.cnblogs.com/rond
關於FTP的應用免不了要對FTP進行增刪查改什麼的。通過搜尋，整理和修改，自己寫了一個FTP的Helper類。此篇文章目的有二（2最近流行）。
-
- 累積程式碼，方便自己以後查閱使用；
- 分享程式碼，方便他人使用。
以下是類：
FtpHelper.cs
以下是重點說明：
如何獲取某一目錄下的檔案和資料夾列表。
由於FtpWebRequest類只提供了WebRequestMethods.Ftp.ListDirectory方式和WebRequestMethods.Ftp.ListDirectoryDetails方式。這個方法獲取到的是包含檔案列表和資料夾列表的資訊。並不是單單隻包含某一類。為此我們需要分析獲取資訊的特點。分析發現，對於資料夾會有“<DIR>”這一項，而檔案沒有。所以我們可以根據這個來區分。一下分別是獲取檔案列表和資料夾列表的程式碼：
獲取資料夾：
/// <summary>
/// 從ftp伺服器上獲得資料夾列表
/// </summary>
/// <param name="RequedstPath">伺服器下的相對路徑</param>
/// <returns></returns>
public static List<string> GetDirctory(string RequedstPath)
{
List<string> strs = new List<string>();
try
{
string uri = path + RequedstPath; //目標路徑 path為伺服器地址
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential(username, password);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());//中文檔名
string line = reader.ReadLine();
while (line != null)
{
if (line.Contains("<DIR>"))
{
string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim();
strs.Add(msg);
}
line = reader.ReadLine();
}
reader.Close();
response.Close();
return strs;
}
catch (Exception ex)
{
Console.WriteLine("獲取目錄出錯：" + ex.Message);
}
return strs;
}
獲取檔案列表
/// <summary>
/// 從ftp伺服器上獲得檔案列表
/// </summary>
/// <param name="RequedstPath">伺服器下的相對路徑</param>
/// <returns></returns>
public static List<string> GetFile(string RequedstPath)
{
List<string> strs = new List<string>();
try
{
string uri = path + RequedstPath; //目標路徑 path為伺服器地址
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential(username, password);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());//中文檔名
string line = reader.ReadLine();
while (line != null)
{
if (!line.Contains("<DIR>"))
{
string msg = line.Substring(39).Trim();
strs.Add(msg);
}
line = reader.ReadLine();
}
reader.Close();
response.Close();
return strs;
}
catch (Exception ex)
{
Console.WriteLine("獲取檔案出錯：" + ex.Message);
}
return strs;
}
其他程式碼並不需要過多的說明，註釋已經說的相當明確了。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Threading;
namespace FtpSyn
{
static public class FtpHelper
{
//基本設定
static private string path = @"ftp://" + Helper.GetAppConfig("obj") + "/"; //目標路徑
static private string ftpip =Helper.GetAppConfig("obj"); //ftp IP地址
static private string username = Helper.GetAppConfig("username"); //ftp使用者名稱
static private string password = Helper.GetAppConfig("password"); //ftp密碼
//獲取ftp上面的檔案和資料夾
public static string[] GetFileList(string dir)
{
string[] downloadFiles;
StringBuilder result = new StringBuilder();
FtpWebRequest request;
try
{
request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));
request.UseBinary = true;
request.Credentials = new NetworkCredential(username, password);//設定使用者名稱和密碼
request.Method = WebRequestMethods.Ftp.ListDirectory;
request.UseBinary = true;
WebResponse response = request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
string line = reader.ReadLine();
while (line != null)
{
result.Append(line);
result.Append("\n");
Console.WriteLine(line);
line = reader.ReadLine();
}
// to remove the trailing '\n'
result.Remove(result.ToString().LastIndexOf('\n'), 1);
reader.Close();
response.Close();
return result.ToString().Split('\n');
}
catch (Exception ex)
{
Console.WriteLine("獲取ftp上面的檔案和資料夾：" + ex.Message);
downloadFiles = null;
return downloadFiles;
}
}
/// <summary>
/// 獲取檔案大小
/// </summary>
/// <param name="file">ip伺服器下的相對路徑</param>
/// <returns>檔案大小</returns>
public static int GetFileSize(string file)
{
StringBuilder result = new StringBuilder();
FtpWebRequest request;
try
{
request = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + file));
request.UseBinary = true;
request.Credentials = new NetworkCredential(username, password);//設定使用者名稱和密碼
request.Method = WebRequestMethods.Ftp.GetFileSize;
int dataLength = (int)request.GetResponse().ContentLength;
return dataLength;
}
catch (Exception ex)
{
Console.WriteLine("獲取檔案大小出錯：" + ex.Message);
return -1;
}
}
/// <summary>
/// 檔案上傳
/// </summary>
/// <param name="filePath">原路徑（絕對路徑）包括檔名</param>
/// <param name="objPath">目標資料夾：伺服器下的相對路徑 不填為根目錄</param>
public static void FileUpLoad(string filePath,string objPath="")
{
try
{
string url = path;
if(objPath!="")
url += objPath + "/";
try
{
FtpWebRequest reqFTP = null;
//待上傳的檔案 （全路徑）
try
{
FileInfo fileInfo = new FileInfo(filePath);
using (FileStream fs = fileInfo.OpenRead())
{
long length = fs.Length;
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url + fileInfo.Name));
//設定連線到FTP的帳號密碼
reqFTP.Credentials = new NetworkCredential(username, password);
//設定請求完成後是否保持連線
reqFTP.KeepAlive = false;
//指定執行命令
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
//指定資料傳輸型別
reqFTP.UseBinary = true;
using (Stream stream = reqFTP.GetRequestStream())
{
//設定緩衝大小
int BufferLength = 5120;
byte[] b = new byte[BufferLength];
int i;
while ((i = fs.Read(b, 0, BufferLength)) > 0)
{
stream.Write(b, 0, i);
}
Console.WriteLine("上傳檔案成功");
}
}
}
catch (Exception ex)
{
Console.WriteLine("上傳檔案失敗錯誤為" + ex.Message);
}
finally
{
}
}
catch (Exception ex)
{
Console.WriteLine("上傳檔案失敗錯誤為" + ex.Message);
}
finally
{
}
}
catch (Exception ex)
{
Console.WriteLine("上傳檔案失敗錯誤為" + ex.Message);
}
}
/// <summary>
/// 刪除檔案
/// </summary>
/// <param name="fileName">伺服器下的相對路徑 包括檔名</param>
public static void DeleteFileName(string fileName)
{
try
{
FileInfo fileInf = new FileInfo(ftpip +""+ fileName);
string uri = path + fileName;
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// 指定資料傳輸型別
reqFTP.UseBinary = true;
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential(username, password);
// 預設為true，連線不會被關閉
// 在一個命令之後被執行
reqFTP.KeepAlive = false;
// 指定執行什麼命令
reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();
}
catch (Exception ex)
{
Console.WriteLine("刪除檔案出錯：" + ex.Message);
}
}
/// <summary>
/// 新建目錄 上一級必須先存在
/// </summary>
/// <param name="dirName">伺服器下的相對路徑</param>
public static void MakeDir(string dirName)
{
try
{
string uri = path + dirName;
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// 指定資料傳輸型別
reqFTP.UseBinary = true;
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential(username, password);
reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();
}
catch (Exception ex)
{
Console.WriteLine("建立目錄出錯：" + ex.Message);
}
}
/// <summary>
/// 刪除目錄 上一級必須先存在
/// </summary>
/// <param name="dirName">伺服器下的相對路徑</param>
public static void DelDir(string dirName)
{
try
{
string uri = path + dirName;
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential(username, password);
reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
response.Close();
}
catch (Exception ex)
{
Console.WriteLine("刪除目錄出錯：" + ex.Message);
}
}
/// <summary>
/// 從ftp伺服器上獲得資料夾列表
/// </summary>
/// <param name="RequedstPath">伺服器下的相對路徑</param>
/// <returns></returns>
public static List<string> GetDirctory(string RequedstPath)
{
List<string> strs = new List<string>();
try
{
string uri = path + RequedstPath; //目標路徑 path為伺服器地址
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential(username, password);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());//中文檔名
string line = reader.ReadLine();
while (line != null)
{
if (line.Contains("<DIR>"))
{
string msg = line.Substring(line.LastIndexOf("<DIR>")+5).Trim();
strs.Add(msg);
}
line = reader.ReadLine();
}
reader.Close();
response.Close();
return strs;
}
catch (Exception ex)
{
Console.WriteLine("獲取目錄出錯：" + ex.Message);
}
return strs;
}
/// <summary>
/// 從ftp伺服器上獲得檔案列表
/// </summary>
/// <param name="RequedstPath">伺服器下的相對路徑</param>
/// <returns></returns>
public static List<string> GetFile(string RequedstPath)
{
List<string> strs = new List<string>();
try
{
string uri = path + RequedstPath; //目標路徑 path為伺服器地址
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
// ftp使用者名稱和密碼
reqFTP.Credentials = new NetworkCredential(username, password);
reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
WebResponse response = reqFTP.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());//中文檔名
string line = reader.ReadLine();
while (line != null)
{
if (!line.Contains("<DIR>"))
{
string msg = line.Substring(39).Trim();
strs.Add(msg);
}
line = reader.ReadLine();
}
reader.Close();
response.Close();
return strs;
}
catch (Exception ex)
{
Console.WriteLine("獲取檔案出錯：" + ex.Message);
}
return strs;
}
}
}