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   源码介绍

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

namespace UploadFile2Sftp
{
    public partial class Form1 : Form
    {
        SFTPHelper SFTP;


        public Form1()
        {
            InitializeComponent(); 
        }

        

        private void btnConnect_Click(object sender, EventArgs e)
        {
            SFTP = new SFTPHelper(txtServer.Text, txtUser.Text, txtPwd.Text);
            if (!SFTP.Connect())
            {
                MessageBox.Show("connect fail");
            }
            else
            {
                MessageBox.Show("connect ok");
            }
        }

        private void btnClose_Click(object sender, EventArgs e)
        {
          
        }

        private void btnSelFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Multiselect = false;
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                txtFile.Text = ofd.FileName;
            }
        }

        private void btnUpload_Click(object sender, EventArgs e)
        {
            if (txtFile.Text.Trim()!=string.Empty && SFTP.Connected)
            {
                if (SFTP.Put(txtFile.Text, "sounds","888_3.txt"))
                {
                    MessageBox.Show("upload ok");
                }
                else
                {
                    MessageBox.Show("upload fail");
                }
            }
        }

        private void btnClose_Click_1(object sender, EventArgs e)
        {
            if (SFTP.Connected)
            {
                SFTP.Disconnect();
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string DownloadFileName = "3d1f5463_P4HGK426_3.wav";//这是服务器上音频文件的名称
                if (SFTP.Get("sounds/888_3.txt", @"C:\999_3.txt"))
                {
                    MessageBox.Show("download ok");
                }
                else
                {
                    MessageBox.Show("download fail");
                }

        } 


    }
}