如题
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Imports System.Net
Imports System.Net.Sockets
Imports System.Text
Public Class Form1
Inherits System.Windows.Forms.Form
Dim intPort As Integer
Dim strAddress As String
Dim GroupEP As IPEndPoint
Dim SendUdp As New UdpClient
#Region " Windows 窗体设计器生成的代码 "
Public Sub New()
MyBase.New()
'该调用是 Windows 窗体设计器所必需的。
InitializeComponent()
'在 InitializeComponent() 调用之后添加任何初始化
End Sub
'窗体重写 dispose 以清理组件列表。
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Windows 窗体设计器所必需的
Private components As System.ComponentModel.IContainer
'注意: 以下过程是 Windows 窗体设计器所必需的
'可以使用 Windows 窗体设计器修改此过程。
'不要使用代码编辑器修改它。
Friend WithEvents btnSend As System.Windows.Forms.Button
Friend WithEvents txtMessage As System.Windows.Forms.TextBox
Friend WithEvents txtResult As System.Windows.Forms.TextBox
Friend WithEvents btnStart As System.Windows.Forms.Button
Friend WithEvents txtIP As System.Windows.Forms.TextBox
Friend WithEvents txtPort As System.Windows.Forms.TextBox
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.btnStart = New System.Windows.Forms.Button
Me.txtIP = New System.Windows.Forms.TextBox
Me.txtPort = New System.Windows.Forms.TextBox
Me.txtResult = New System.Windows.Forms.TextBox
Me.txtMessage = New System.Windows.Forms.TextBox
Me.btnSend = New System.Windows.Forms.Button
Me.Button1 = New System.Windows.Forms.Button
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.SuspendLayout()
'
'btnStart
'
Me.btnStart.Location = New System.Drawing.Point(456, 24)
Me.btnStart.Name = "btnStart"
Me.btnStart.Size = New System.Drawing.Size(144, 32)
Me.btnStart.TabIndex = 0
Me.btnStart.Text = "启动"
'
'txtIP
'
Me.txtIP.Location = New System.Drawing.Point(24, 32)
Me.txtIP.Name = "txtIP"
Me.txtIP.Size = New System.Drawing.Size(184, 21)
Me.txtIP.TabIndex = 1
Me.txtIP.Text = "230.100.100.100"
'
'txtPort
'
Me.txtPort.Location = New System.Drawing.Point(224, 32)
Me.txtPort.Name = "txtPort"
Me.txtPort.Size = New System.Drawing.Size(184, 21)
Me.txtPort.TabIndex = 2
Me.txtPort.Text = "36000"
'
'txtResult
'
Me.txtResult.Location = New System.Drawing.Point(16, 80)
Me.txtResult.Multiline = True
Me.txtResult.Name = "txtResult"
Me.txtResult.Size = New System.Drawing.Size(584, 216)
Me.txtResult.TabIndex = 3
Me.txtResult.Text = "TextBox3"
'
'txtMessage
'
Me.txtMessage.Location = New System.Drawing.Point(16, 312)
Me.txtMessage.Name = "txtMessage"
Me.txtMessage.Size = New System.Drawing.Size(392, 21)
Me.txtMessage.TabIndex = 4
Me.txtMessage.Text = "TextBox4"
'
'btnSend
'
Me.btnSend.Location = New System.Drawing.Point(464, 312)
Me.btnSend.Name = "btnSend"
Me.btnSend.Size = New System.Drawing.Size(128, 24)
Me.btnSend.TabIndex = 5
Me.btnSend.Text = "传送"
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(472, 360)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(120, 24)
Me.Button1.TabIndex = 6
Me.Button1.Text = "Button1"
'
'TextBox1
'
Me.TextBox1.Location = New System.Drawing.Point(16, 352)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.Size = New System.Drawing.Size(240, 21)
Me.TextBox1.TabIndex = 7
Me.TextBox1.Text = "TextBox1"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
Me.ClientSize = New System.Drawing.Size(624, 574)
Me.Controls.Add(Me.TextBox1)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.btnSend)
Me.Controls.Add(Me.txtMessage)
Me.Controls.Add(Me.txtResult)
Me.Controls.Add(Me.txtPort)
Me.Controls.Add(Me.txtIP)
Me.Controls.Add(Me.btnStart)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
Dim bteSendDate() As Byte
Try
bteSendDate = Encoding.Unicode.GetBytes(txtMessage.Text)
SendUdp.Send(bteSendDate, bteSendDate.Length, GroupEP)
txtResult.text = txtResult.text + txtMessage.Text + vbCrLf
txtMessage.Text = ""
txtMessage.Focus()
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
Dim GroupIP As IPAddress
Dim intSendPort As Integer
GroupIP = IPAddress.Parse(txtIP.Text)
intSendPort = Integer.Parse(txtPort.Text)
GroupEP = New IPEndPoint(GroupIP, intSendPort)
SendUdp.JoinMulticastGroup(GroupIP, 12)
MessageBox.Show("启动完成！")
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim sHostName As String
Dim i As Integer
sHostName = Dns.GetHostName()
Dim ipE As IPHostEntry = Dns.GetHostByName(sHostName)
Dim IpA() As IPAddress = ipE.AddressList
For i = 0 To IpA.GetUpperBound(0)
TextBox1.Text = ("IP Address " & i.ToString & " " & IpA(i).ToString)
Next
End Sub
End Class
