• FtpHelper类匿名获取FTP文件


    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Net;
    using System.Text;
    using System.Windows.Forms;
    using Test;
    
    namespace Test
    {
        public class FtpHelper
        {
            //基本设置
            static private string path = @"ftp://" + "192.168.1.107" + "/";    //目标路径
            static private string ftpip = "192.168.1.107";    //ftp IP地址
            static private string username = "anonymous";   //ftp用户名
            static private string password = "chenshengwei@contoso.com";   //ftp密码
    
            //获取ftp上面的文件和文件夹
            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);//设置用户名和密码
                    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("
    ");
                        Console.WriteLine(line);
                        line = reader.ReadLine();
                    }
                    // to remove the trailing '
    '
                    result.Remove(result.ToString().LastIndexOf('
    '), 1);
                    reader.Close();
                    response.Close();
                    return result.ToString().Split('
    ');
                }
                catch (Exception ex)
                {
                    Console.WriteLine("获取ftp上面的文件和文件夹:" + ex.Message);
                    downloadFiles = null;
                    return downloadFiles;
                }
            }
    
            /// <summary>
            /// 获取文件大小
            /// </summary>
            /// <param name="file">ip服务器下的相对路径</param>
            /// <returns>文件大小</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);//设置用户名和密码
                    request.Method = WebRequestMethods.Ftp.GetFileSize;
    
                    int dataLength = (int)request.GetResponse().ContentLength;
    
                    return dataLength;
                }
                catch (Exception ex)
                {
                    Console.WriteLine("获取文件大小出错:" + ex.Message);
                    return -1;
                }
            }
    
            /// <summary>
            /// 文件上传
            /// </summary>
            /// <param name="filePath">原路径(绝对路径)包括文件名</param>
            /// <param name="objPath">目标文件夹:服务器下的相对路径 不填为根目录</param>
            public static void FileUpLoad(string filePath, string objPath = "")
            {
                try
                {
                    string url = path;
                    if (objPath != "")
                        url += objPath + "/";
                    try
                    {
    
                        FtpWebRequest reqFTP = null;
                        //待上传的文件 (全路径)
                        try
                        {
                            FileInfo fileInfo = new FileInfo(filePath);
                            using (FileStream fs = fileInfo.OpenRead())
                            {
                                long length = fs.Length;
                                reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(url + fileInfo.Name));
    
                                //设置连接到FTP的帐号密码
                                reqFTP.Credentials = new NetworkCredential(username, password);
                                //设置请求完成后是否保持连接
                                reqFTP.KeepAlive = false;
                                //指定执行命令
                                reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
                                //指定数据传输类型
                                reqFTP.UseBinary = true;
    
                                using (Stream stream = reqFTP.GetRequestStream())
                                {
                                    //设置缓冲大小
                                    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("上传文件成功");
                                }
                            }
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine("上传文件失败错误为" + ex.Message);
                        }
                        finally
                        {
    
                        }
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("上传文件失败错误为" + ex.Message);
                    }
                    finally
                    {
    
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine("上传文件失败错误为" + ex.Message);
                }
            }
    
            /// <summary>
            /// 删除文件
            /// </summary>
            /// <param name="fileName">服务器下的相对路径 包括文件名</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));
                    // 指定数据传输类型
                    reqFTP.UseBinary = true;
                    // ftp用户名和密码
                    reqFTP.Credentials = new NetworkCredential(username, password);
                    // 默认为true,连接不会被关闭
                    // 在一个命令之后被执行
                    reqFTP.KeepAlive = false;
                    // 指定执行什么命令
                    reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                    response.Close();
                }
                catch (Exception ex)
                {
                    Console.WriteLine("删除文件出错:" + ex.Message);
                }
            }
    
            /// <summary>
            /// 新建目录 上一级必须先存在
            /// </summary>
            /// <param name="dirName">服务器下的相对路径</param>
            public static void MakeDir(string dirName)
            {
                try
                {
                    string uri = path + dirName;
                    FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                    // 指定数据传输类型
                    reqFTP.UseBinary = true;
                    // ftp用户名和密码
                    reqFTP.Credentials = new NetworkCredential(username, password);
                    reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                    response.Close();
                }
                catch (Exception ex)
                {
                    Console.WriteLine("创建目录出错:" + ex.Message);
                }
            }
    
            /// <summary>
            /// 删除目录 上一级必须先存在
            /// </summary>
            /// <param name="dirName">服务器下的相对路径</param>
            public static void DelDir(string dirName)
            {
                try
                {
                    string uri = path + dirName;
                    FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                    // ftp用户名和密码
                    reqFTP.Credentials = new NetworkCredential(username, password);
                    reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                    response.Close();
                }
                catch (Exception ex)
                {
                    Console.WriteLine("删除目录出错:" + ex.Message);
                }
            }
    
            /// <summary>
            /// 从ftp服务器上获得文件夹列表
            /// </summary>
            /// <param name="RequedstPath">服务器下的相对路径</param>
            /// <returns></returns>
            public static List<string> GetDirctory(string RequedstPath)
            {
                List<string> strs = new List<string>();
                try
                {
                    string uri = path + RequedstPath;   //目标路径 path为服务器地址
                    FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                    // ftp用户名和密码
                    reqFTP.Credentials = new NetworkCredential(username, password);
                    reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                    WebResponse response = reqFTP.GetResponse();
                    StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
    
                    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("获取目录出错:" + ex.Message);
                }
                return strs;
            }
    
            /// <summary>
            /// 从ftp服务器上获得文件列表
            /// </summary>
            /// <param name="RequedstPath">服务器下的相对路径</param>
            /// <returns></returns>
            public static List<string> GetFile(string RequedstPath)
            {
                List<string> strs = new List<string>();
                try
                {
                    string uri = path + RequedstPath;   //目标路径 path为服务器地址
                    FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
                    // ftp用户名和密码
                    reqFTP.Credentials = new NetworkCredential(username, password);
                    reqFTP.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                    WebResponse response = reqFTP.GetResponse();
                    StreamReader reader = new StreamReader(response.GetResponseStream());//中文文件名
    
                    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("获取文件出错:" + ex.Message);
                }
                return strs;
            }
            //从ftp服务器上下载文件的功能  
            public void Download(string fileName)
            {
                FtpWebRequest reqFTP;
                try
                {
                    string filePath = Application.StartupPath;
                    FileStream outputStream = new FileStream(filePath + "\" + fileName, FileMode.Create);
                    reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path + fileName));
                    reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
                    reqFTP.UseBinary = true;
                    reqFTP.Credentials = new NetworkCredential(username, password);
                    reqFTP.UsePassive = false;
                    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();
    
    
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
    
        }
    }
    
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  • 原文地址:https://www.cnblogs.com/dearbeans/p/7587068.html
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