form1.vb

编程之道VB.NETt程序设计入门-589M.zip

Imports System.IO
Imports System.Net
Imports System.Net.Sockets

Public Class Form1
    Inherits System.Windows.Forms.Form

#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

    '窗体重写处置以清理组件列表。
    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 btnConnect As System.Windows.Forms.Button
    Friend WithEvents btnSend As System.Windows.Forms.Button
    Friend WithEvents txtMsg As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.btnConnect = New System.Windows.Forms.Button()
        Me.btnSend = New System.Windows.Forms.Button()
        Me.txtMsg = New System.Windows.Forms.TextBox()
        Me.SuspendLayout()
        '
        'btnConnect
        '
        Me.btnConnect.Location = New System.Drawing.Point(64, 152)
        Me.btnConnect.Name = "btnConnect"
        Me.btnConnect.Size = New System.Drawing.Size(64, 24)
        Me.btnConnect.TabIndex = 1
        Me.btnConnect.Text = "连接"
        '
        'btnSend
        '
        Me.btnSend.Location = New System.Drawing.Point(200, 152)
        Me.btnSend.Name = "btnSend"
        Me.btnSend.Size = New System.Drawing.Size(56, 24)
        Me.btnSend.TabIndex = 3
        Me.btnSend.Text = "发送"
        '
        'txtMsg
        '
        Me.txtMsg.Location = New System.Drawing.Point(24, 64)
        Me.txtMsg.Name = "txtMsg"
        Me.txtMsg.Size = New System.Drawing.Size(264, 21)
        Me.txtMsg.TabIndex = 4
        Me.txtMsg.Text = ""
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(312, 246)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.txtMsg, Me.btnSend, Me.btnConnect})
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Dim tcpClient As tcpClient
    Dim netStream As NetworkStream
    Dim rdStream As StreamReader
    Dim wtStream As StreamWriter

    Private Sub btnConnect_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnConnect.Click
        Try
            tcpClient = New TcpClient("localhost", 1111)
            netStream = tcpClient.GetStream()
            rdStream = New StreamReader(netStream)
            wtStream = New StreamWriter(netStream)
        Catch ex As Exception
            MessageBox.Show("无法连接服务器")
        End Try
    End Sub

    Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSend.Click
        Try
            wtStream.WriteLine(txtMsg.Text)
            wtStream.Flush()
        Catch ex As Exception
            MessageBox.Show("无法发送消息")
        End Try
    End Sub

    Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
        wtStream.WriteLine("Exit")
        wtStream.Flush()
    End Sub
End Class