VB:用Winsock控件数组作服务的实现过程范例

最新推荐文章于 2015-07-29 17:33:21 发布

现在还是人类

最新推荐文章于 2015-07-29 17:33:21 发布

阅读量2.3k

点赞数 1

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/supermanking/article/details/11586707

本文介绍了一个使用Visual Basic实现的简单网络服务器程序。该程序通过创建和管理多个Winsock控件来处理客户端连接请求，并能够接收及转发数据。文章详细展示了如何定义服务器信息结构、监听端口、处理连接请求及数据到达事件。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Visual Basic Code

Private Type SockServerInfo
Enabled As Boolean
End Type
Dim Server ( )   As SockServerInfo

Private Sub Form_Load ( )
CreateServer
End Sub

Private Sub Winsock1_ConnectionRequest ( _
Index As Integer, _
  ByVal requestID As Long )
  If Winsock1 ( Index ) .State <> 0 Then Winsock1 ( Index ) .Close
Winsock1 ( Index ) .Accept requestID
CreateServer
End Sub

Private Sub Winsock1_DataArrival ( Index As Integer, ByVal bytesTotal As Long )
  Dim NetWorkString As String
Winsock1 ( Index ) .GetData NetWorkString, vbString, bytesTotal
Print "Index " & Index & " 收到数据：" & NetWorkString
Winsock1 ( Index ) .SendData "转发回去的数据"
End Sub

Private Sub Winsock1_Error ( Index As Integer, _
  ByVal Number As Integer, _
Description As String, _
  ByVal Scode As Long, _
  ByVal Source As String, _
  ByVal HelpFile As String, _
  ByVal HelpContext As Long, _
CancelDisplay As Boolean )
CancelDisplay =   True
Winsock1_Close Index
End Sub

Private Sub Winsock1_Close ( Index As Integer )
StopServer Index
End Sub

Private Sub CreateServer ( )
  Dim ServerMaxCount As Long
  Dim X As Long
  Dim IsHaveFalse As Long
  On Error Resume Next
ServerMaxCount =   UBound ( Server )
  If Err.Number <> 0 Then
ServerMaxCount =   0
  ReDim Server ( ServerMaxCount )
  Else
IsHaveFalse =   0
  For X =   0 To ServerMaxCount
  If Server ( X ) .Enabled =   False Then
ServerMaxCount = X
IsHaveFalse =   1
  Exit For
  End If
  Next X
  If IsHaveFalse =   0 Then
ServerMaxCount = ServerMaxCount + 1
  ReDim Preserve Server ( ServerMaxCount )
  End If
Load Winsock1 ( ServerMaxCount )
  End If
Winsock1 ( ServerMaxCount ) .LocalPort =   60000
Winsock1 ( ServerMaxCount ) .Listen
Server ( ServerMaxCount ) .Enabled =   True
End Sub

Private Sub StopServer ( Index As Integer )
  Dim ServerMaxCount As Long
  If Winsock1 ( Index ) .State <> 0 Then Winsock1 ( Index ) .Close
  On Error Resume Next
ServerMaxCount =   UBound ( Server )
  If Index = ServerMaxCount Then
  If Index =   0 Then
  Erase Server
  Else
Unload Winsock1 ( Index )
  ReDim Preserve Server ( ServerMaxCount - 1 )
  End If
  Else
Unload Winsock1 ( Index )
Server ( Index ) .Enabled =   False
  End If
End Sub

其实概念很简单，主要是处理好控件数组的创建和释放就可以了