FTPHelper.cs

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using System;  
using System.Collections.Generic;  
using System.Text;  
using System.IO;  
using System.Net;
using System.Text.RegularExpressions;

public class FTPHelper
{
    #region 字段
    string ftpURI;
    string ftpUserID;
    string ftpServerIP;
    string ftpPassword;
    string ftpRemotePath;
    #endregion

    /// <summary>  
    /// 连接FTP服务器
    /// </summary>  
    /// <param name="FtpServerIP">FTP连接地址</param>  
    /// <param name="FtpRemotePath">指定FTP连接成功后的当前目录, 如果不指定即默认为根目录</param>  
    /// <param name="FtpUserID">用户名</param>  
    /// <param name="FtpPassword">密码</param>  
    public FTPHelper(string FtpServerIP, string FtpRemotePath, string FtpUserID, string FtpPassword)
    {
        ftpServerIP = FtpServerIP;
        ftpRemotePath = FtpRemotePath;
        ftpUserID = FtpUserID;
        ftpPassword = FtpPassword;
        ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/";
    }

    /// <summary>  
    /// 上传  
    /// </summary>   
    public void Upload(string filename)
    {
        FileInfo fileInf = new FileInfo(filename);
        FtpWebRequest reqFTP;
        reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileInf.Name));
        reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
        reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
        reqFTP.KeepAlive = false;
        reqFTP.UseBinary = true;
        reqFTP.ContentLength = fileInf.Length;
        int buffLength = 2048;
        byte[] buff = new byte[buffLength];
        int contentLen;
        FileStream fs = fileInf.OpenRead();
        try
        {
            Stream strm = reqFTP.GetRequestStream();
            contentLen = fs.Read(buff, 0, buffLength);
            while (contentLen != 0)
            {
                strm.Write(buff, 0, contentLen);
                contentLen = fs.Read(buff, 0, buffLength);
            }
            strm.Close();