C# FTP操作類

cymt 9年前發布 | 2K 次閱讀 C# FTP
using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
namespace Utility
{
    public class FtpUpDown
    {

    string ftpServerIP;

    string ftpUserID;

    string ftpPassword;

    FtpWebRequest reqFTP;

    private void Connect(String path)//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);

    }

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

        this.ftpUserID = ftpUserID;

        this.ftpPassword = ftpPassword;
    }

    //都調用這個

    private string[] GetFileList(string path, string WRMethods)//上面的代碼示例了如何從ftp服務器上獲得文件列表
    {
        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("\n");

                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)
        {
            Log.WriteError("Get FileList Error:" + ex.Message);
            downloadFiles = null;

            return downloadFiles;
        }
    }

    public string[] GetFileList(string path)//上面的代碼示例了如何從ftp服務器上獲得文件列表
    {
        return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
    }
    public string[] GetFileList()//上面的代碼示例了如何從ftp服務器上獲得文件列表
    {
        return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
    }

    public void Upload(string filename) //上面的代碼實現了從ftp服務器上載文件的功能
    {
        FileInfo fileInf = new FileInfo(filename);

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

        Connect(uri);//連接        

        // 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.UploadFile;

        // 上傳文件時通知服務器文件的大小

        reqFTP.ContentLength = fileInf.Length;
        // 緩沖大小設置為kb 
        int buffLength = 2048;
        byte[] buff = new byte[buffLength];

        int contentLen;

        // 打開一個文件流(System.IO.FileStream) 去讀上傳的文件

        FileStream fs = fileInf.OpenRead();

        try
        {

            // 把上傳的文件寫入流

            Stream strm = reqFTP.GetRequestStream();

            // 每次讀文件流的kb

            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);

            }

            // 關閉兩個流

            strm.Close();

            fs.Close();

        }

        catch (Exception ex)
        {
             Log.WriteError( "Upload Error:" + ex.Message);
        }

    }

    public bool Download(string filePath, string fileName, out string errorinfo)////上面的代碼實現了從ftp服務器下載文件的功能
    {
        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,無法下載", newFileName);
                return false;
            }
            string url = "ftp://" + ftpServerIP + "/" + fileName;
            Connect(url);//連接  
            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},無法下載", ex.Message);

            return false;

        }

    }

    //刪除文件

    public void DeleteFileName(string fileName)
    {
        try
        {
            FileInfo fileInf = new FileInfo(fileName);

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

            Connect(uri);//連接        

            // 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.DeleteFile;

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

        }

        catch (Exception ex)
        {
            Log.WriteError("刪除錯誤:" + ex.Message);
        }

    }

    //創建目錄

    public void MakeDir(string dirName)
    {
        try
        {
            string uri = "ftp://" + ftpServerIP + "/" + dirName;

            Connect(uri);//連接     

            reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

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

            response.Close();

        }

        catch (Exception ex)
        {
            Log.WriteError("創建目錄錯誤:" + ex.Message);
        }

    }

    //刪除目錄

    public void delDir(string dirName)
    {
        try
        {
            string uri = "ftp://" + ftpServerIP + "/" + dirName;

            Connect(uri);//連接     

            reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;

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

            response.Close();

        }

        catch (Exception ex)
        {
            Log.WriteError("刪除目錄錯誤:" + ex.Message);
        }

    }

    //獲得文件大小

    public long GetFileSize(string filename)
    {



        long fileSize = 0;

        try
        {

            FileInfo fileInf = new FileInfo(filename);

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

            Connect(uri);//連接     

            reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;

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

            fileSize = response.ContentLength;

            response.Close();

        }

        catch (Exception ex)
        {
            Log.WriteError("獲得文件大小錯誤:" + 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);//連接
            reqFTP.Method = WebRequestMethods.Ftp.Rename;
            reqFTP.RenameTo = newFilename;
            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
            response.Close();

        }

        catch (Exception ex)
        {
            Log.WriteError("文件改名錯誤:" + ex.Message);
        }

    }
    //讀取文件

    public Stream ReadFile(string fileName)
    {
        try
        {
            string url = "ftp://" + ftpServerIP + "/" + fileName;
            Connect(url);//連接  
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
            Stream ftpStream = response.GetResponseStream();
            return ftpStream;
        }

        catch (Exception ex)
        {
            Log.WriteError("讀取文件錯誤:" + ex.Message);
            return null;
        }

    }

    //獲得文件明晰

    public string[] GetFilesDetailList()
    {

        return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);

    }

    //獲得文件明晰

    public string[] GetFilesDetailList(string path)
    {

        return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);

    }

    // 文件存在檢查 
    public bool fileCheckExist(string fileName) 
    { 
        bool success = false;
        FtpWebResponse response = null;
        StreamReader reader = null;
        try 
        {
            string url = "ftp://" + ftpServerIP + "/" + fileName;
            Connect(url);//連接  
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            response = (FtpWebResponse)reqFTP.GetResponse();
            reader = new StreamReader(response.GetResponseStream());
            string line = reader.ReadLine(); 
            if (line != null) 
            {
                success = true; 
            } 
        } 
        catch (Exception) 
        {
            success = false; 
        }
        finally
        {
            if (reader != null)
            {
                reader.Close();
            }

            if (response != null)
            {
                response.Close();
            }
        }
        return success; 
    } 
}

}</pre>
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