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首先，在VB工具栏中添加部件Microsoft Internet Transfer Control 6.0 ，之后工具箱会多一个Inet的控件。
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拖放该控件到窗体上，设置控件中的属性
protocol : 2-icFTP
RemoteHost : 你的FTP服务IP或域名
RemotePort : 你的FTP端口
URL : 你的FTPURL地址
UserName和Password 这两个就不用说了
'窗体中添加一个文本框（text1）和一个按钮（Command1）代码如下：
Private Sub Command1_Click()
Dim isRight As Boolean
Dim filestr As String
filestr = app.path "\A"
Inet1.Execute "", "PUT " filestr " /A"
isRight = Inet1.StillExecuting '获取当前是否仍然在执行命令
Do While isRight
isRight = Inet1.StillExecuting
DoEvents
Loop
filestr = app.path "\B"
Inet1.Execute "", "PUT " filestr " /B"
isRight = Inet1.StillExecuting '获取当前是否仍然在执行命令
Do While isRight
isRight = Inet1.StillExecuting
DoEvents
Loop
filestr = app.path "\C"
Inet1.Execute "", "PUT " filestr " /C"
isRight = Inet1.StillExecuting '获取当前是否仍然在执行命令
Do While isRight
isRight = Inet1.StillExecuting
DoEvents
Loop
filestr = app.path "\D"
Inet1.Execute "", "PUT " filestr " /a/D"
isRight = Inet1.StillExecuting '获取当前是否仍然在执行命令
Do While isRight
isRight = Inet1.StillExecuting
DoEvents
Loop
End Sub
Private Sub Inet1_StateChanged(ByVal State As Integer)
text1.Text = text1.Text + CStr(State)
Select Case State
Case 11
text1.text ="在与主机通信的过程中发生了错误"
Case 12
text1.Text = "上传完成"
End Select
End Sub
Dim OpenFileDialog As New OpenFileDialog
OpenFileDialog.InitialDirectory = My.Computer.FileSystem.SpecialDirectories.MyDocuments
OpenFileDialog.Filter = "文本文件(*.jpg)|*.jpg|所有文件(*.*)|*.*"
If (OpenFileDialog.ShowDialog(Me) = System.Windows.Forms.DialogResult.OK) Then
Dim FileName As String = OpenFileDialog.FileName
' TODO: 在此处添加打开文件的代码。
textbox1.Text = FileName
End If
第一个按钮 上传
Dim filelast As String = fileaddbefore.Text.Substring(fileaddbefore.Text.LastIndexOf("."), fileaddbefore.Text.Length - fileaddbefore.Text.LastIndexOf("."))
MessageBox.Show(filelast)
My.Computer.Network.UploadFile(textbox1.Text, "" 文件名.Text filelast, "登录名1", "登录密码", True, 100)
第二个按钮
net1.Protocol = icFTP
Inet1.RemoteHost = ServerName'服务器地址
Inet1.RemotePort = 21'FTP端口
Inet1.UserName = uName'用户名
Inet1.Password = uPWS'密码
下载文件：
Inet1.Execute "", "GET 1.txt d:\1.txt"
ri = Inet1.StillExecuting
Do While ri
ri = Inet1.StillExecuting
DoEvents
Loop
上传文件：
Inet1.Execute "", "PUT d:\1.txt 1.txt"
ri = Inet1.StillExecuting
Do While ri
ri = Inet1.StillExecuting
DoEvents
Loop
最简单的方法是用ftp批处理，代码如下
open app.path "\ftpcmd.ftp" for output as #1 '创建一个ftp命令文件
print #1, "open " "IP" '打开ftp服务器
print #1, "user " "用户名"
print #1, "pass " "密码"
print #1, "lcd " "本地文件路径" '指定本地文件所在目录
print #1, "put " "文件名"
close #1 'frp命令文件写完了
shell "ftp -n -s:" app.path "\ftpcmd.ftp" '调用系统ftp，并执行上面写的ftpcmd.ftp
My.Computer.Network.UploadFile(本地文件路径, ftp服务器路径包括文件名,用户名,密码)