100分求ftp上传的类

'----------------------------------------------------------------
'       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 "事件"
    Public Event DownloadFileBytes(ByVal Count As Integer)
#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)            RaiseEvent DownloadFileBytes(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

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Text;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;
using Bestcomy.Web.Controls.Upload;namespace AspNetUpload
{
/// <summary>
/// SingleUpload 的摘要说明。
/// </summary>
public class SingleUpload : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox box_comments;
protected System.Web.UI.WebControls.Button btn_upload;
protected System.Web.UI.WebControls.Label txt_result;

private void Page_Load(object sender, System.EventArgs e)
{
BestcomyUpload upldr = new BestcomyUpload();
string fpath = Path.Combine(Server.MapPath("."),"Upload");
if(!Directory.Exists(fpath))
Directory.CreateDirectory(fpath);
upldr.UploadFolder=fpath; //设置上传文件临时目录，要求ASPNET用户对该文件夹有写权限。
} #region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.btn_upload.Click += new System.EventHandler(this.btn_upload_Click);
this.Load += new System.EventHandler(this.Page_Load); }
#endregion /// <summary>
/// 获取最大可上传文件大小。
/// </summary>
/// <returns></returns>

protected double GetMaxRequestLength()
{
double maxLength=0;
string sPath = typeof(String).Assembly.Location;
sPath = Path.GetDirectoryName(sPath);
sPath = Path.Combine(sPath,"CONFIG\\machine.config");
XmlDocument doc=new XmlDocument();
doc.Load(sPath);
maxLength=Convert.ToDouble(doc.SelectSingleNode("configuration/system.web/httpRuntime/@maxRequestLength").Value);

doc.Load(Path.Combine(Request.PhysicalApplicationPath,"web.config"));
XmlNode node=doc.SelectSingleNode("configuration/system.web/httpRuntime/@maxRequestLength");
if(node!=null)
{
double length=Convert.ToDouble(node.Value);
if(length<maxLength)
maxLength=length;
} return maxLength/1024;
} private void btn_upload_Click(object sender, System.EventArgs e)
{
string fpath = Path.Combine(Server.MapPath("."),"Upload"); StringBuilder sb = new StringBuilder();
sb.Append("<hr>说明文字："+box_comments.Text+"<br>");
sb.Append("上传文件列表：<br>");
sb.Append("<table border='1'>");
sb.Append("<tr><td>文件名</td><td>大小</td></tr>"); BestcomyUpload upldr = new BestcomyUpload();
UploadFile file = upldr.GetUploadFile("file1");
if(file!=null)
{
file.SaveAs(Path.Combine(fpath,Path.GetFileName(file.FileName)));
sb.Append("<tr><td>"+Path.GetFileName(file.FileName)+"</td><td>"+file.ContentLength.ToString("###,###")+" 字节</td></tr>");
}
sb.Append("<table>");
txt_result.Text = sb.ToString();
}
}
}

FTP Client Library in C#:
http://www.csharphelp.com/archives/archive9.htmlFTP Server in C#:
http://www.c-sharpcorner.com/internet/FTPServerinCSharp.asp

调试易

100分求ftp上传的类

解决方案 »