frmserver.frm

关于WINSOCK控件基本编程的例程,提供电子邮件例程

VERSION 5.00
Object = "{248DD890-BB45-11CF-9ABC-0080C7E7B78D}#1.0#0"; "MSWINSCK.OCX"
Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "COMDLG32.OCX"
Begin VB.Form frmServer 
   BackColor       =   &H8000000A&
   BorderStyle     =   4  'Fixed ToolWindow
   Caption         =   "Server Application   (File Transfer using MS Winsock 6.0) "
   ClientHeight    =   4500
   ClientLeft      =   30
   ClientTop       =   330
   ClientWidth     =   5400
   FillColor       =   &H00FFFFFF&
   BeginProperty Font 
      Name            =   "Times New Roman"
      Size            =   9
      Charset         =   0
      Weight          =   400
      Underline       =   0   'False
      Italic          =   0   'False
      Strikethrough   =   0   'False
   EndProperty
   ForeColor       =   &H80000013&
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   4500
   ScaleWidth      =   5400
   ShowInTaskbar   =   0   'False
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton cmdClear 
      Caption         =   "Clear"
      Height          =   252
      Left            =   4320
      TabIndex        =   8
      Top             =   3840
      Width           =   972
   End
   Begin VB.CommandButton cmdSend 
      Caption         =   "发送"
      Height          =   252
      Left            =   4200
      TabIndex        =   7
      Top             =   1200
      Width           =   972
   End
   Begin VB.CommandButton cmdBrowse 
      Caption         =   "浏览"
      Height          =   252
      Left            =   4200
      TabIndex        =   6
      Top             =   360
      Width           =   972
   End
   Begin VB.TextBox txtFileName 
      Height          =   300
      Left            =   120
      TabIndex        =   4
      Top             =   360
      Width           =   3615
   End
   Begin MSWinsockLib.Winsock tcpServer 
      Left            =   4800
      Top             =   600
      _ExtentX        =   741
      _ExtentY        =   741
      _Version        =   393216
   End
   Begin MSComDlg.CommonDialog cdOpen 
      Left            =   4800
      Top             =   120
      _ExtentX        =   688
      _ExtentY        =   688
      _Version        =   393216
   End
   Begin VB.CommandButton cmdClose 
      Caption         =   "关闭"
      Height          =   252
      Left            =   4200
      TabIndex        =   2
      Top             =   1560
      Width           =   972
   End
   Begin VB.TextBox txtView 
      Height          =   1332
      Left            =   50
      MultiLine       =   -1  'True
      ScrollBars      =   2  'Vertical
      TabIndex        =   0
      Top             =   2400
      Width           =   5292
   End
   Begin VB.Label Label3 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "File to send:"
      Height          =   204
      Index           =   0
      Left            =   120
      TabIndex        =   5
      Top             =   120
      Width           =   840
   End
   Begin VB.Label lblStatus 
      BorderStyle     =   1  'Fixed Single
      Caption         =   " 状态：监听中"
      Height          =   252
      Left            =   48
      TabIndex        =   3
      Top             =   4200
      Width           =   5292
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "到达数据监视："
      Height          =   225
      Left            =   120
      TabIndex        =   1
      Top             =   2160
      Width           =   1260
   End
End
Attribute VB_Name = "frmServer"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub cmdClear_Click()
    txtView = ""
    txtFileName = ""
End Sub

Private Sub cmdClose_Click()
    Unload Me
End Sub

Private Sub cmdSend_Click()
    Dim FName_Only As String
    
    If txtFileName = "" Then
       MsgBox "没有选择要发送的文件", vbCritical
    Else
       If frmServer.tcpServer.State <> sckClosed Then
          FName_Only$ = GetFileName(txtFileName)
          SendFile FName_Only$
       End If
    End If
End Sub

Private Sub Form_Load()
    tcpServer.LocalPort = Port
    tcpServer.Listen
    bInconnection = False
    Status "监听中…没有连接"
End Sub
Private Sub Form_Unload(Cancel As Integer)
    SendData "服务器关闭！"
    Pause 500
    tcpServer.Close
    End
End Sub
Private Sub tcpServer_Close()
    If tcpServer.State <> sckClosed Then tcpServer.Close
    Form_Load
    
End Sub

Private Sub tcpServer_ConnectionRequest(ByVal requestID As Long)
     On Error GoTo IDERROR
     If tcpServer.State <> sckClosed Then tcpServer.Close
     tcpServer.Accept requestID
     bInconnection = True
     Status "监听中…已经连接"
     SendData "Accepted,"
     Exit Sub
IDERROR:
     MsgBox Err.Description, vbCritical
End Sub

Private Sub tcpServer_DataArrival(ByVal bytesTotal As Long)
    Dim Command      As String
    Dim NewArrival   As String
    Dim Data         As String
    Static DataCnt   As Long
    tcpServer.GetData NewArrival$, vbString
    Command = EvalData(NewArrival$, 1)
    Data$ = EvalData(NewArrival$, 2)
    Select Case Command$
        Case "OpenFile"
           Dim Fname As String
           Fname$ = App.Path & "\" & Data$
           Open Fname$ For Binary As #1
           Status "打开文件…" & Data$
        Case "CloseFile"
           Close #1
           Status "文件传递完毕！"
           Pause 3000
           Status "监听中…已经连接"
        Case Else
           Put #1, , NewArrival$
           txtView = txtView & NewArrival$
           DataCnt& = DataCnt& + 1
           Status "获得文件中…" & (MAX_CHUNK * DataCnt&) & " bytes"
              
    End Select
    
End Sub
Private Sub cmdBrowse_Click()
    cdOpen.ShowOpen
    If Not vbCancel Then
       txtFileName = cdOpen.FileName
    End If
End Sub