No probs - It relates to an FTP class (included below my code) - it
works when I download a single file, or if I hard code a file name
into the destination path -
Sub FTP_DownloadFolderContents(ByVal ftpFolder As String, ByVal
sDestinationPath As String, ByVal sMask As String)
Dim sSourceFiles As String()
Dim sDestFiles As String()
Dim objFTP As New clsFTP
Dim strSite As String
Dim strSiteDir As String
Dim strUID As String, strPwd As String
strSite = My.Settings.ftp_Server
strSiteDir = My.Settings.ftp_SOURCE_Folder
strUID = My.Settings.ftp_User
strPwd = My.Settings.ftp_Password
objFTP.RemoteHost = strSite
objFTP.RemotePath = strSiteDir
'slashes are optional at beginning and end of RemotePath!
objFTP.RemoteUser = strUID
objFTP.RemotePassword = strPwd
objFTP.RemotePort = 21
'Ensure FTP folder is formatted correctly
ftpFolder = FtpFolderName(ftpFolder)
'Change to the required FTP folder
objFTP.ChangeDirectory(ftpFolder)
If objFTP.Login() = True Then
objFTP.SetBinaryMode(True)
'UPLOAD FILE
'objFTP.UploadFile(strFullPath, False)
'GET FILE LIST
sSourceFiles = objFTP.GetFileList(sMask)
sDestFiles = objFTP.GetFileList(sMask)
objFTP.CloseConnection()
objFTP = Nothing
'DESTINATION SETTINGS
'LOOP THROUGH FILE LIST AND DOWNLOAD EACH FILE
Dim sTempSourceFile As String = "Test_1.txt"
Dim sTempDestFile As String = "Test_1.txt"
Dim i As Long
For i = 0 To sSourceFiles.GetUpperBound(0)
If Len(sSourceFiles(i)) Then
FTP_DownloadFile(sSourceFiles(i), ftpFolder,
sDestinationPath & "\" & sSourceFiles(i))
End If
Next i
End If
End Sub
--------------------------------- CLASS CONTAINED BELOW THIS POINT
----------------------------------
'----------------------------------------------------------------
' Class : clsFTP.vb
' Description : This class will enable a developer to
' perform FTP Processing in VB.NET.
' The class supports such features as:
' - Uploading a file.
' - Create/Remove a directory.
' - Remove a file.
' - and much much more...
' Date : 7th February 2002.
' Conversion : The code was converted from C# code.
' Note : If this code works it was converted by
' Vick S. If it doesn't it was converted
' by someone else.
' Also note that the code DOES NOT
' ACCOMODATE for proxy servers. Only
' DIRECT connections to FTP Sites.
'
' Bit Shifting within VB.NET 2002 is not supported via the
' traditional bit shifting operators (i.e. << - Bitwise left
' and >> - Bitwise right).
' Dividing a number by 2^16 in VB.NET 2002 is the same as bit-
' shifting right 16 positions.
' Multiplying a number by 2^16 in VB.NET 2002 is the same as
' bit-shifting left 16 positions.
'
' Check out the following MSDN Article on bitshifting in
' VB.NET 2003:
' - Visual Basic .NET 2003 Language Changes
' - By Duncan Mackenzie.
'----------------------------------------------------------------
Imports System
Imports System.Net
Imports System.IO
Imports System.Text
Imports System.Net.Sockets
' Main FTP Class.
Public Class clsFTP
#Region "Main Class Variable Declarations"
Private m_sRemoteHost, m_sRemotePath, m_sRemoteUser As String
Private m_sRemotePassword, m_sMess As String
Private m_iRemotePort, m_iBytes As Int32
Private m_objClientSocket As Socket
Private m_iRetValue As Int32
Private m_bLoggedIn As Boolean ' Change to loggedIn
Private m_sMes, m_sReply As String
' Set the size of the packet that is used to read and
' write data to the FTP Server to the spcified size below.
Public Const BLOCK_SIZE = 512
Private m_aBuffer(BLOCK_SIZE) As Byte
Private ASCII As Encoding = Encoding.ASCII
' General variables
Private m_sMessageString As String
#End Region
#Region "Class Constructors"
'
' Main class constructor.
Public Sub New()
m_sRemoteHost = "microsoft"
m_sRemotePath = "."
m_sRemoteUser = "anonymous"
m_sRemotePassword = ""
m_sMessageString = ""
m_iRemotePort = 21
m_bLoggedIn = False
End Sub
' Parametized constructor.
Public Sub New(ByVal sRemoteHost As String, _
ByVal sRemotePath As String, _
ByVal sRemoteUser As String, _
ByVal sRemotePassword As String, _
ByVal iRemotePort As Int32)
m_sRemoteHost = sRemoteHost
m_sRemotePath = sRemotePath
m_sRemoteUser = sRemoteUser
m_sRemotePassword = sRemotePassword
m_sMessageString = ""
m_iRemotePort = iRemotePort
m_bLoggedIn = False
End Sub
#End Region
#Region "Public Properties"
'
' Set/Get the name of the FTP Server.
Public Property RemoteHost() As String
Get
Return m_sRemoteHost
End Get
Set(ByVal Value As String)
m_sRemoteHost = Value
End Set
End Property
' Set/Get the FTP Port Number.
Public Property RemotePort() As Int32
Get
Return m_iRemotePort
End Get
Set(ByVal Value As Int32)
m_iRemotePort = Value
End Set
End Property
' Set/Get the remote path.
Public Property RemotePath() As String
Get
Return m_sRemotePath
End Get
Set(ByVal Value As String)
m_sRemotePath = Value
End Set
End Property
' Set the remote password.
Public Property RemotePassword() As String
Get
Return m_sRemotePassword
End Get
Set(ByVal Value As String)
m_sRemotePassword = Value
End Set
End Property
' Set/Get the remote user.
Public Property RemoteUser() As String
Get
Return m_sRemoteUser
End Get
Set(ByVal Value As String)
m_sRemoteUser = Value
End Set
End Property
' Set the class messagestring.
Public Property MessageString() As String
Get
Return m_sMessageString
End Get
Set(ByVal Value As String)
m_sMessageString = Value
End Set
End Property
#End Region
#Region "Public Subs and Functions"
'
' Return a list of files within a string() array from the
' file system.
Public Function GetFileList(ByVal sMask As String) As String()
Dim cSocket As Socket
Dim bytes As Int32
Dim seperator As Char = ControlChars.Lf
Dim mess() As String
m_sMes = ""
If (Not (m_bLoggedIn)) Then
Login()
End If
cSocket = CreateDataSocket()
SendCommand("NLST " & sMask)
If (Not (m_iRetValue = 150 Or m_iRetValue = 125)) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
m_sMes = ""
Do While (True)
m_aBuffer.Clear(m_aBuffer, 0, m_aBuffer.Length)
bytes = cSocket.Receive(m_aBuffer, m_aBuffer.Length, 0)
m_sMes += ASCII.GetString(m_aBuffer, 0, bytes)
If (bytes < m_aBuffer.Length) Then
Exit Do
End If
Loop
mess = m_sMes.Split(seperator)
cSocket.Close()
ReadReply()
If (m_iRetValue <> 226) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
Return mess
End Function
'
' Get the size of the file on the FTP Server.
Public Function GetFileSize(ByVal sFileName As String) As Long
Dim size As Long
If (Not (m_bLoggedIn)) Then
Login()
End If
SendCommand("SIZE " & sFileName)
size = 0
If (m_iRetValue = 213) Then
size = Int64.Parse(m_sReply.Substring(4))
Else
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
Return size
End Function
'
' Log into the FTP Server.
Public Function Login() As Boolean
m_objClientSocket = New Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp)
Dim ep As New
IPEndPoint(Dns.Resolve(m_sRemoteHost).AddressList(0), m_iRemotePort)
Try
m_objClientSocket.Connect(ep)
Catch ex As Exception
MessageString = m_sReply
Throw New IOException("Couldn't connect to remote server")
End Try
ReadReply()
If (m_iRetValue <> 220) Then
CloseConnection()
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
SendCommand("USER " & m_sRemoteUser)
If (Not (m_iRetValue = 331 Or m_iRetValue = 230)) Then
Cleanup()
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
If (m_iRetValue <> 230) Then
SendCommand("PASS " & m_sRemotePassword)
If (Not (m_iRetValue = 230 Or m_iRetValue = 202)) Then
Cleanup()
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
End If
m_bLoggedIn = True
ChangeDirectory(m_sRemotePath)
' Return the end result.
Return m_bLoggedIn
End Function
'
' If the value of mode is true, set binary mode for
' downloads.
' Else, set Ascii mode.
Public Sub SetBinaryMode(ByVal bMode As Boolean)
If (bMode) Then
SendCommand("TYPE I")
Else
SendCommand("TYPE A")
End If
If (m_iRetValue <> 200) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
End Sub
'
' Download a file to the Assembly's local directory,
' keeping the same file name.
Public Sub DownloadFile(ByVal sFileName As String)
DownloadFile(sFileName, "", False)
End Sub
'
' Download a remote file to the Assembly's local
' directory, keeping the same file name, and set
' the resume flag.
Public Sub DownloadFile(ByVal sFileName As String, _
ByVal bResume As Boolean)
DownloadFile(sFileName, "", bResume)
End Sub
'
' Download a remote file to a local file name which can
' include a path. The local file name will be created or
' overwritten, but the path must exist.
Public Sub DownloadFile(ByVal sFileName As String, _
ByVal sLocalFileName As String)
DownloadFile(sFileName, sLocalFileName, False)
End Sub
'
' Download a remote file to a local file name which can
' include a path, and set the resume flag. The local file
' name will be created or overwritten, but the path must
' exist.
Public Sub DownloadFile(ByVal sFileName As String, _
ByVal sLocalFileName As String, _
ByVal bResume As Boolean)
Dim st As Stream
Dim output As FileStream
Dim cSocket As Socket
Dim offset, npos As Long
If (Not (m_bLoggedIn)) Then
Login()
End If
SetBinaryMode(True)
If (sLocalFileName.Equals("")) Then
sLocalFileName = sFileName
End If
If (Not (File.Exists(sLocalFileName))) Then
st = File.Create(sLocalFileName)
st.Close()
End If
output = New FileStream(sLocalFileName, FileMode.Open)
cSocket = CreateDataSocket()
offset = 0
If (bResume) Then
offset = output.Length
If (offset > 0) Then
SendCommand("REST " & offset)
If (m_iRetValue <> 350) Then
'throw new IOException(reply.Substring(4));
'Some servers may not support resuming.
offset = 0
End If
End If
If (offset > 0) Then
npos = output.Seek(offset, SeekOrigin.Begin)
End If
End If
SendCommand("RETR " & sFileName)
If (Not (m_iRetValue = 150 Or m_iRetValue = 125)) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
Do While (True)
m_aBuffer.Clear(m_aBuffer, 0, m_aBuffer.Length)
m_iBytes = cSocket.Receive(m_aBuffer, m_aBuffer.Length, 0)
output.Write(m_aBuffer, 0, m_iBytes)
If (m_iBytes <= 0) Then
Exit Do
End If
Loop
output.Close()
If (cSocket.Connected) Then
cSocket.Close()
End If
ReadReply()
If (Not (m_iRetValue = 226 Or m_iRetValue = 250)) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
End Sub
'
' Upload a file.
Public Sub UploadFile(ByVal sFileName As String)
UploadFile(sFileName, False)
End Sub
'
' Upload a file and set the resume flag.
Public Sub UploadFile(ByVal sFileName As String, _
ByVal bResume As Boolean)
Dim cSocket As Socket
Dim offset As Long
Dim input As FileStream
Dim bFileNotFound As Boolean
If (Not (m_bLoggedIn)) Then
Login()
End If
cSocket = CreateDataSocket()
offset = 0
If (bResume) Then
Try
SetBinaryMode(True)
offset = GetFileSize(sFileName)
Catch ex As Exception
offset = 0
End Try
End If
If (offset > 0) Then
SendCommand("REST " & offset)
If (m_iRetValue <> 350) Then
'throw new IOException(reply.Substring(4));
'Remote server may not support resuming.
offset = 0
End If
End If
SendCommand("STOR " & Path.GetFileName(sFileName))
If (Not (m_iRetValue = 125 Or m_iRetValue = 150)) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
' Check to see if the file exists before the upload.
bFileNotFound = False
If (File.Exists(sFileName)) Then
' Open input stream to read source file
input = New FileStream(sFileName, FileMode.Open)
If (offset <> 0) Then
input.Seek(offset, SeekOrigin.Begin)
End If
' Upload the file
m_iBytes = input.Read(m_aBuffer, 0, m_aBuffer.Length)
Do While (m_iBytes > 0)
cSocket.Send(m_aBuffer, m_iBytes, 0)
m_iBytes = input.Read(m_aBuffer, 0, m_aBuffer.Length)
Loop
input.Close()
Else
bFileNotFound = True
End If
If (cSocket.Connected) Then
cSocket.Close()
End If
' No point in reading the return value if the file was
' not found.
If (bFileNotFound) Then
MessageString = m_sReply
Throw New IOException("The file: " & sFileName & " was not
found. Can not upload the file to the FTP Site.")
End If
ReadReply()
If (Not (m_iRetValue = 226 Or m_iRetValue = 250)) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
End Sub
'
' Delete a file from the remote FTP server.
Public Function DeleteFile(ByVal sFileName As String) As Boolean
Dim bResult As Boolean
bResult = True
If (Not (m_bLoggedIn)) Then
Login()
End If
SendCommand("DELE " & sFileName)
If (m_iRetValue <> 250) Then
bResult = False
MessageString = m_sReply
End If
' Return the final result.
Return bResult
End Function
'
' Rename a file on the remote FTP server.
Public Function RenameFile(ByVal sOldFileName As String, _
ByVal sNewFileName As String) As
Boolean
Dim bResult As Boolean
bResult = True
If (Not (m_bLoggedIn)) Then
Login()
End If
SendCommand("RNFR " & sOldFileName)
If (m_iRetValue <> 350) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
' known problem
' rnto will not take care of existing file.
' i.e. It will overwrite if newFileName exist
SendCommand("RNTO " & sNewFileName)
If (m_iRetValue <> 250) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
Return bResult
End Function
'
' Create a directory on the remote FTP server.
Public Function CreateDirectory(ByVal sDirName As String) As
Boolean
Dim bResult As Boolean
bResult = True
If (Not (m_bLoggedIn)) Then
Login()
End If
SendCommand("MKD " & sDirName)
If (m_iRetValue <> 257) Then
bResult = False
MessageString = m_sReply
End If
' Return the final result.
Return bResult
End Function
'
' Delete a directory on the remote FTP server.
Public Function RemoveDirectory(ByVal sDirName As String) As
Boolean
Dim bResult As Boolean
bResult = True
If (Not (m_bLoggedIn)) Then
Login()
End If
SendCommand("RMD " & sDirName)
If (m_iRetValue <> 250) Then
bResult = False
MessageString = m_sReply
End If
' Return the final result.
Return bResult
End Function
'
' Change the current working directory on the remote FTP
' server.
Public Function ChangeDirectory(ByVal sDirName As String) As
Boolean
Dim bResult As Boolean
bResult = True
If (sDirName.Equals(".")) Then
Exit Function
End If
If (Not (m_bLoggedIn)) Then
Login()
End If
SendCommand("CWD " & sDirName)
If (m_iRetValue <> 250) Then
bResult = False
MessageString = m_sReply
End If
Me.m_sRemotePath = sDirName
' Return the final result.
Return bResult
End Function
'
' Close the FTP connection.
Public Sub CloseConnection()
If (Not (m_objClientSocket Is Nothing)) Then
SendCommand("QUIT")
End If
Cleanup()
End Sub
#End Region
#Region "Private Subs and Functions"
'
' Read the reply from the FTP Server
Private Sub ReadReply()
m_sMes = ""
m_sReply = ReadLine()
m_iRetValue = Int32.Parse(m_sReply.Substring(0, 3))
End Sub
'
' Clean up some variables.
Private Sub Cleanup()
If Not (m_objClientSocket Is Nothing) Then
m_objClientSocket.Close()
m_objClientSocket = Nothing
End If
m_bLoggedIn = False
End Sub
'
' Read a line from the server.
Private Function ReadLine(Optional ByVal bClearMes As Boolean =
False) As String
Dim seperator As Char = ControlChars.Lf
Dim mess() As String
If (bClearMes) Then
m_sMes = ""
End If
Do While (True)
m_aBuffer.Clear(m_aBuffer, 0, BLOCK_SIZE)
m_iBytes = m_objClientSocket.Receive(m_aBuffer,
m_aBuffer.Length, 0)
m_sMes += ASCII.GetString(m_aBuffer, 0, m_iBytes)
If (m_iBytes < m_aBuffer.Length) Then
Exit Do
End If
Loop
mess = m_sMes.Split(seperator)
If (m_sMes.Length > 2) Then
m_sMes = mess(mess.Length - 2)
Else
m_sMes = mess(0)
End If
If (Not (m_sMes.Substring(3, 1).Equals(" "))) Then
Return ReadLine(True)
End If
Return m_sMes
End Function
'
' Send a command to the FTP Server.
Private Sub SendCommand(ByVal sCommand As String)
sCommand = sCommand & ControlChars.CrLf
Dim cmdbytes As Byte() = ASCII.GetBytes(sCommand)
m_objClientSocket.Send(cmdbytes, cmdbytes.Length, 0)
ReadReply()
End Sub
'
' Create a Data socket.
Private Function CreateDataSocket() As Socket
Dim index1, index2, len As Int32
Dim partCount, i, port As Int32
Dim ipData, buf, ipAddress As String
Dim parts(6) As Int32
Dim ch As Char
Dim s As Socket
Dim ep As IPEndPoint
SendCommand("PASV")
If (m_iRetValue <> 227) Then
MessageString = m_sReply
Throw New IOException(m_sReply.Substring(4))
End If
index1 = m_sReply.IndexOf("(")
index2 = m_sReply.IndexOf(")")
ipData = m_sReply.Substring(index1 + 1, index2 - index1 - 1)
len = ipData.Length
partCount = 0
buf = ""
For i = 0 To ((len - 1) And partCount <= 6)
ch = Char.Parse(ipData.Substring(i, 1))
If (Char.IsDigit(ch)) Then
buf += ch
ElseIf (ch <> ",") Then
MessageString = m_sReply
Throw New IOException("Malformed PASV reply: " &
m_sReply)
End If
If ((ch = ",") Or (i + 1 = len)) Then
Try
parts(partCount) = Int32.Parse(buf)
partCount += 1
buf = ""
Catch ex As Exception
MessageString = m_sReply
Throw New IOException("Malformed PASV reply: " &
m_sReply)
End Try
End If
Next
ipAddress = parts(0) & "." & parts(1) & "." & parts(2) & "." &
parts(3)
' Make this call in VB.NET 2002. We would like to
' bitshift the number by 8 bits, so in VB.NET 2002 we
' multiply the number by 2 to the power of 8.
port = parts(4) * (2 ^ 8)
' Make this call and comment out the above line for
' VB.NET 2003.
'port = parts(4) << 8
' Determine the data port number.
port = port + parts(5)
s = New Socket(AddressFamily.InterNetwork, SocketType.Stream,
ProtocolType.Tcp)
ep = New IPEndPoint(Dns.Resolve(ipAddress).AddressList(0),
port)
Try
s.Connect(ep)
Catch ex As Exception
MessageString = m_sReply
Throw New IOException("Can't connect to remote server")
End Try
Return s
End Function
#End Region
#Region " *** Example Code *** "
'
' Copy and paste the code below into a VB WebForm or WinForm
' application and then do the following:
'
' 1). From within the ASP.NET or WinForm app set a
' reference to the FTP.dll and BitOperators.dll
' files.
' 2). At the top of the application code file
' (E.g WebForm1.aspx.vb or Form1.vb) type in
' Imports FTP
' 3). Compile the application and run.
' 4). Have fun.
'Protected Sub TestFTP()
' Dim ff As clsFTP
' Try
' '-------------------------------------------
' ' OPTION 1
' ' --------
' '
' ' Create an instance of the FTP Class.
' 'ff = New clsFTP()
' ' Setup the appropriate properties.
' 'ff.RemoteHost = "microsoft"
' 'ff.RemoteUser = "ftpuser"
' 'ff.RemotePassword = "password"
' '-------------------------------------------
' '-------------------------------------------
' ' OPTION 2
' ' --------
' ' Pass the values into the constructor
' ' instead. These can be overridden by simply
' ' setting the appropriate properties on the
' ' instance of the clsFTP Class.
' ff = New clsFTP("microsoft", _
' ".", _
' "ftpuser", _
' "password", _
' 21)
' ' Attempt to log into the FTP Server.
' If (ff.Login()) Then
' '
' ' Move the to Area1\Section1\Subby1\ directory.
' ff.ChangeDirectory("Area1")
' ff.ChangeDirectory("Section1")
' 'ff.CreateDirectory("Subby1")
' ff.ChangeDirectory("Subby1")
' ff.SetBinaryMode(True)
' ' Upload a file.
' 'ff.UploadFile("d:\general\secureapps.pdf")
' ' Download a file.
' 'ff.DownloadFile("secureapps.pdf", "d:\general
\secureapps.pdf")
' ' Remove a file from the FTP Site.
' If (ff.DeleteFile("secureapps.pdf")) Then
' Response.Write("File has been removed from FTP
Site")
' 'MessageBox.Show("File has been removed from FTP
Site")
' Else
' Response.Write("Unable to remove file from FTP
Site. Message from server: " & ff.MessageString & "<br>")
' 'MessageBox.Show("Unable to remove file from FTP
Site")
' End If
' ' Rename a file on the FTP Site.
' 'If (ff.RenameFile("secureapps.pdf", "newapp.pdf"))
Then
' ' Response.Write("File has been renamed")
' ' MessageBox.Show("File has been renamed")
' 'End If
' 'ff.ChangeDirectory("..")
' 'If (ff.RemoveDirectory("Subby1")) Then
' ' Response.Write("Directory has been removed<br>")
' ' ' MessageBox.Show("Directory has been removed")
' 'Else
' ' Response.Write("Unable to remove the directory.
Message from server: " & ff.MessageString & "<br>")
' ' ' MessageBox.Show("Unable to remove the
directory.")
' 'End If
' End If
' Catch ex As System.Exception
' ' ASP.NET
' Response.Write(ex.Message & "<BR>")
' Response.Write("Message from FTP Server was: " &
ff.MessageString)
' ' WinForms
' 'Messagebox.Show(ex.Message)
' 'MessageBox.show("Message from FTP Server was: " &
ff.MessageString)
' Finally
' '
' ' Always close down the connection to ensure that
' ' there are no "stray" Fido's Fetching data. In
' ' other words, no stray/limbo/not-in-use FTP
' ' connections.
' ff.CloseConnection()
' End Try
'End Sub
#End Region
End Class
