.net,C#,Ftp各种操作,上传,下载,删除文件,创建目录,删除目录

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.IO;
using System.Windows.Forms;
using System.Drawing;
using System.Text;

/// <summary>
/// FtpUpDown 的摘要说明
/// </summary>

public class FtpUpDown
{
    string ftpServerIP;
    string ftpUserID;
    string ftpPassword;
    FtpWebRequest reqFTP;

    private void Connect(String path)//连接ftp
    {
        // 根据uri创建FtpWebRequest对象
        reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));

        // 指定数据传输类型
        reqFTP.UseBinary = true;

        // ftp用户名和密码
        reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
    }

    public FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)
    {
        this.ftpServerIP = ftpServerIP;
        this.ftpUserID = ftpUserID;
        this.ftpPassword = ftpPassword;
    }

    //都调用这个
    private string[] GetFileList(string path, string WRMethods)//下面的代码示例了如何从ftp服务器上获得文件列表
    {
        string[] downloadFiles;
        StringBuilder result = new StringBuilder();
        try
        {
            Connect(path);
            reqFTP.Method = WRMethods;
            WebResponse response = reqFTP.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名
            string line = reader.ReadLine();
            while (line != null)
            {
                result.Append(line);
                result.Append(" ");
                line = reader.ReadLine();
            }

            // to remove the trailing '' ''
            result.Remove(result.ToString().LastIndexOf(""), 1);
            reader.Close();
            response.Close();
            //char[] seperator={'\n'};
            return result.ToString().Split(' ');
        }
        catch (Exception ex)
        {
            System.Windows.Forms.MessageBox.Show(ex.Message);
            downloadFiles = null;
            return downloadFiles;
        }
    }

    public string[] GetFileList(string path)//下面的代码示例了如何从ftp服务器上获得文件列表
    {
        return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
    }

    public string[] GetFileList()//下面的代码示例了如何从ftp服务器上获得文件列表
    {
        return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
    }

    public void Upload(string filename, string photoname) //下面的代码实现了从ftp服务器上载文件的功能
    {

        FileInfo fileInf = new FileInfo(filename);
        string uri = "ftp://" + ftpServerIP + "/" + photoname;
        Connect(uri);//连接
        // 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.UploadFile;

        // 上传文件时通知服务器文件的大小
        reqFTP.ContentLength = fileInf.Length;

        // 缓冲大小设置为kb
        int buffLength = int.Parse(fileInf.Length.ToString());
        //int buffLength = 2048;
        byte[] buff = new byte[buffLength];
        int contentLen;

        // 打开一个文件流(System.IO.FileStream) 去读上传的文件
        FileStream fs = fileInf.OpenRead();
        try
        {
            // 把上传的文件写入流
            Stream strm = reqFTP.GetRequestStream();

            // 每次读文件流的kb
            contentLen = fs.Read(buff, 0, buffLength);

            // 流内容没有结束
            while (contentLen != 0)
            {
                // 把内容从file stream 写入upload stream
                strm.Write(buff, 0, contentLen);
                contentLen = fs.Read(buff, 0, buffLength);
            }

            // 关闭两个流
            strm.Close();
            fs.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "Upload Error");
        }
    }

    public bool Download(string filePath, string fileName, out string errorinfo)/**/////下面的代码实现了从ftp服务器下载文件的功能
    {
        try
        {
            String onlyFileName = Path.GetFileName(fileName);
            string newFileName = filePath + "\\" + onlyFileName;
            if (File.Exists(newFileName))
            {
                errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
                return false;
            }

            string url = "ftp://" + ftpServerIP + "/" + fileName;
            Connect(url);//连接
            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);
            FileStream outputStream = new FileStream(newFileName, FileMode.Create);
            while (readCount > 0)
            {
                outputStream.Write(buffer, 0, readCount);
                readCount = ftpStream.Read(buffer, 0, bufferSize);
            }

            ftpStream.Close();
            outputStream.Close();
            response.Close();
            errorinfo = "";
            return true;
        }
        catch (Exception ex)
        {
            errorinfo = string.Format("因{0},无法下载", ex.Message);
            return false;
        }
    }

    //删除文件
    public void DeleteFileName(string fileName)
    {
        try
        {
            FileInfo fileInf = new FileInfo(fileName);
            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
            Connect(uri);//连接

            // 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)
        {
            MessageBox.Show(ex.Message, "删除错误");
        }
    }

    //创建目录
    public void MakeDir(string dirName)
    {
        try
        {
            string uri = "ftp://" + ftpServerIP + "/" + dirName;
            Connect(uri);//连接
            reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;
            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
            response.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

    //删除目录
    public void delDir(string dirName)
    {
        try
        {
            string uri = "ftp://" + ftpServerIP + "/" + dirName;
            Connect(uri);//连接
            reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
            response.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

    //获得文件大小
    public long GetFileSize(string filename)
    {
        long fileSize = 0;
        try
        {
            FileInfo fileInf = new FileInfo(filename);
            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
            Connect(uri);//连接
            reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
            fileSize = response.ContentLength;
            response.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
        return fileSize;
    }

    //文件改名
    public void Rename(string currentFilename, string newFilename)
    {
        try
        {
            FileInfo fileInf = new FileInfo(currentFilename);
            string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
            Connect(uri);//连接
            reqFTP.Method = WebRequestMethods.Ftp.Rename;
            reqFTP.RenameTo = newFilename;
            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
            //Stream ftpStream = response.GetResponseStream();
            //ftpStream.Close();
            response.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

    //获得文件明晰
    //public string[] GetFilesDetailList()
    //{
    //    return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);
    //}

    ////获得文件明晰
    //public string[] GetFilesDetailList(string path)
    //{
    //    return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);
    //}
}

测试

删除文件夹

FtpUpDown ftpUpDown = new FtpUpDown("ip/", "用户名", "密码");
ftpUpDown.delDir("文件夹名称");

上传文件

FtpUpDown ftpUpDown = new FtpUpDown("ip/", "用户名", "密码");
ftpUpDown.Upload("文件路径");