利用UDP协议收发信息

'------------------//接收远程数据
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Imports System.Net
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Imports System.Net.Sockets
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Imports System.Threading
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Imports System.Text
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Public Class frmMain
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Dim myPort As Integer '端口
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Dim groupIP As IPAddress
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Dim intListenPort As Integer
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Dim inPort As Integer
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Dim strAddress As String
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Dim groupEP As IPEndPoint
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Dim listenUdp As UdpClient
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Dim listenThread As Threading.Thread
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Delegate Sub SetTextCallback(ByVal [text] As String)
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Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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myRecevice() '侦听
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End Sub
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Private Sub myRecevice()
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listenThread = New Thread(AddressOf BeginListen)
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listenThread.Start()
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End Sub
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Private Sub BeginListen()
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Dim bteReceviceData() As Byte
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Dim strReceviceData As String
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new class1(). GetIpPort(myPort) '端口号
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groupIP = IPAddress.Parse(Dns.GetHostAddresses(Dns.GetHostName())(0).ToString())
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intListenPort = myPort 'Integer.Parse("34567")
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groupEP = New IPEndPoint(groupIP, intListenPort)
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listenUdp = New UdpClient(intListenPort)
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'listenUdp.JoinMulticastGroup(groupIP)
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'MsgBox("开始监听

")
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Do
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bteReceviceData = listenUdp.Receive(groupEP)
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strReceviceData = Encoding.Unicode.GetString(bteReceviceData)
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'Me.Label1.Text = strReceviceData
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Me.SetLbl(strReceviceData) '线程安全处理
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Loop
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End Sub
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Private Sub SetLbl(ByVal [text] As String)
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Dim arr() As String
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arr = Split([text], ",")
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If Me.lblBarcode.InvokeRequired Then '商品编号
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblBarcode.Text = arr(0).ToString
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End If
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If Me.lblGoodsName.InvokeRequired Then '商品名称
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblGoodsName.Text = arr(1).ToString
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End If
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If Me.lblOnePrice.InvokeRequired Then '单价
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblOnePrice.Text = Format(CDbl(arr(2).ToString), "0.00")
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End If
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If Me.lblOneQuant.InvokeRequired Then '数量
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblOneQuant.Text = arr(3).ToString
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End If
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If Me.lblOneAPrice.InvokeRequired Then '小计
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblOneAPrice.Text = arr(4).ToString
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End If
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If Me.lblOneZk.InvokeRequired Then '单品折扣
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblOneZk.Text = Format(CDbl(arr(5).ToString), "0.00")
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End If
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If Me.lblDJ.InvokeRequired Then '小票号
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblDJ.Text = arr(6).ToString
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End If
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If Me.lblQuant.InvokeRequired Then '总数量
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblQuant.Text = arr(7).ToString
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End If
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If Me.lblPrice.InvokeRequired Then '总价格
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblPrice.Text = Format(CDbl(arr(8).ToString), "0.00")
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End If
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If Me.lblZK.InvokeRequired Then '总折扣
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Dim d As New SetTextCallback(AddressOf SetLbl)
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Me.Invoke(d, New Object() {[text]})
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Else
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Me.lblZK.Text = Format(CDbl(arr(9).ToString), "0.00")
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End If
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'de.InvokeRequired Then
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'Dim d As New SetTextCallback(AddressOf SetLbl)
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'Me.Invoke(d, New Object() {[text]})
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'Else
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'Me.lblBarcode.Text = [text]
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'End If
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End Sub
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134

End Class

Imports System.Net
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Imports System.Threading
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Imports System.Text
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Imports System.Net.Sockets
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Imports AD_GoodsInfo
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Public Class Form1
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''' <summary>
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''' 取目标机端口
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''' </summary>
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''' <param name="myPort"></param>
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''' <remarks></remarks>
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Public Sub GetPort(ByRef myPort As Integer)
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Dim xmlDoc As New Xml.XmlDocument()
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xmlDoc.Load("sys.xml")
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Dim nodeList As Xml.XmlNodeList = xmlDoc.SelectSingleNode("sys").ChildNodes
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If Not nodeList.Item(0).Name Is Nothing Then '判断结点是否存在
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myPort = CType(nodeList.Item(0).Item("Port").InnerText, Integer)
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End If
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End Sub
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End Class

'----------------------------发数据
2

Imports System.Net
4

Imports System.Threading
5

Imports System.Text
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Imports System.Net.Sockets
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Imports AD_GoodsInfo
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Public Class Form1
9

Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
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Dim info As String
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Dim myIP As String = "" 'IP地址
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Dim myPort As Integer '端口
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info = Me.txtBarcode.Text.Trim() + "," _
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+ Me.txtGoodsName.Text.Trim() + "," _
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+ Me.txtOnePrice.Text.Trim() + "," _
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+ Me.txtOneQuan.Text.Trim() + "," _
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+ Me.txtOneAPrice.Text.Trim() + "," _
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+ Me.txtOneZK.Text.Trim() + "," _
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+ Me.txtDJ.Text.Trim() + "," _
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+ Me.txtQuan.Text.Trim() + "," _
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+ Me.txtPrice.Text.Trim() + "," _
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+ Me.txtZK.Text.Trim()
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Me.GetIpPort(myIP, myPort)
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Dim s As SendMsg = New SendMsg()
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s.SendData(info, myIP, myPort)
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''' <summary>
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''' 取目标机的IP，端口
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''' </summary>
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''' <param name="myIP"></param>
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''' <param name="myPort"></param>
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''' <remarks></remarks>
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Public Sub GetIpPort(ByRef myIP As String, ByRef myPort As Integer)
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Dim xmlDoc As New Xml.XmlDocument()
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xmlDoc.Load("sys.xml")
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Dim nodeList As Xml.XmlNodeList = xmlDoc.SelectSingleNode("sys").ChildNodes
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If Not nodeList.Item(0).Name Is Nothing Then '判断结点是否存在
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myIP = nodeList.Item(0).Item("IP").InnerText
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myPort = CType(nodeList.Item(0).Item("Port").InnerText, Integer)
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End If
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End Sub
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End Class
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Imports System.Net
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Imports System.Net.Sockets
3

Imports System.Threading
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Imports System.Text
5

Public Class SendMsg
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''' <summary>
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''' 发送数据
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''' </summary>
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''' <param name="sendInfo"></param>
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''' <param name="myIP"></param>
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''' <param name="myPort"></param>
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''' <remarks></remarks>
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Public Sub SendData(ByVal sendInfo As String, ByVal myIP As String, ByVal myPort As Integer)
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Try
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Dim dataSend() As Byte
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Dim myUdpClient As UdpClient
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myUdpClient = New UdpClient(myIP, myPort)
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dataSend = System.Text.Encoding.Unicode.GetBytes(sendInfo)
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myUdpClient.Send(dataSend, dataSend.Length)
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myUdpClient.Close()
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Catch ex As Exception
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'发送异常处理
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End Try
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End Sub
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End Class
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<?xml version="1.0" encoding="gb2312"?>
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<sys>
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<set>
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<IP intro="目标机的IP">192.168.1.49</IP>
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<Port intro="目标机端口号">34567</Port>
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</set>
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</sys>

posted @ 2007-02-09 22:01 yongwnet 阅读(522) 评论(0) 编辑收藏举报

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