FTP多任务下载实现类

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Net;
using System.IO;

namespace RSGIS.FTPClient
{
    public partial class FormLoad : DevExpress.XtraEditors.XtraForm
    {
        private string host = "ftp://...:21";
        private string user = "anonymous";
        private string pass = "...";

        private string strLocalFilePath = @"D:";
        private string[] strLists;
        private List<MultiFtpService> MultiThread = new List<MultiFtpService>();
        public FormLoad(string[] strList)
        {
            InitializeComponent();
            strLists = strList;
        }

        public FormLoad()
        {
            InitializeComponent();
            strLists = new string[3];
            strLists[0] = “”
            strLists[1] = “”
            strLists[2] = “”

        private void buttonStart_Click(object sender, EventArgs e)
        {
            taskDo();
        }

        private void buttonStop_Click(object sender, EventArgs e)
        {
            stop();
        }

        private void buttonContinues_Click(object sender, EventArgs e)
        {
            continues();
        }
        //停止
        private void stop()
        {
            for (int i = 0; i < MultiThread.Count; i++)
            {
                MultiThread[i].Stop();
            }
        }
        //继续
        private void continues()
        {
            for (int i = 0; i < MultiThread.Count; i++)
            {
                MultiThread[i].continues();
            }
        }
        //下载
        private void taskDo()
        {
            for (int i = 0; i < strLists.Length; i++)
            {
                string[] files = fileName(strLists[i], strLists[i].Substring(strLists[i].LastIndexOf("/") + 1));
                MultiFtpService threads = new MultiFtpService(host, user, pass, i, i, files[0], files[1]);
                MultiThread.Add(threads);
                threads.WorkMethod += DisplayProgress;
                threads.FileSpeedMethod += DisplaySpeed;
                threads.Start();
            }
        }
        //路径操作
        private string[] fileName(string strRemoteFilePath, string strLocalFileName)
        {
            string strLocalFilePaths = strLocalFilePath + @"\" + strLocalFileName;
            strLocalFilePaths.Replace("\\\\", "\\");
            strRemoteFilePath.Replace("/", "\\");
            string[] files = { strRemoteFilePath, strLocalFilePaths };
            return files;
        }
        /// <summary>
        /// 进度显示
        /// </summary>
        /// <param name="threadindex"></param>
        /// <param name="taskindex"></param>
        /// <param name="progress"></param>
        private void DisplayProgress(int taskindex, int progress)
        {
            this.BeginInvoke(new MethodInvoker(delegate()
            {
                label1.Text = taskindex.ToString();
                this.progressBar2.Value = progress;
                if(progress == 100)
                    this.progressBar2.Value = progressBar2.Maximum;
            }));
        }
        //下载速度显示
        private void DisplaySpeed(int taskindex, string speed)
        {
            this.BeginInvoke(new MethodInvoker(delegate()
            {
                this.labelSpeed.Text = speed + "/s";
            }));

        }

    }
}