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學(xué)習(xí)啦 > 論文大全 > 學(xué)科論文 > 計(jì)算機(jī)論文 > 淺談?dòng)肰B實(shí)現(xiàn)聊天討論室和點(diǎn)對(duì)點(diǎn)會(huì)話論文

淺談?dòng)肰B實(shí)現(xiàn)聊天討論室和點(diǎn)對(duì)點(diǎn)會(huì)話論文

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淺談?dòng)肰B實(shí)現(xiàn)聊天討論室和點(diǎn)對(duì)點(diǎn)會(huì)話論文

  Visual Basic是一種由 公司開(kāi)發(fā)的結(jié)構(gòu)化的、模塊化的、面向?qū)ο蟮摹瑓f(xié)助開(kāi)發(fā)環(huán)境的事件驅(qū)動(dòng)為機(jī)制的可視化程序設(shè)計(jì)語(yǔ)言。從任何標(biāo)準(zhǔn)來(lái)說(shuō),VB都是世界上使用人數(shù)最多的語(yǔ)言——不管是盛贊VB的開(kāi)發(fā)者還是抱怨VB的開(kāi)發(fā)者的數(shù)量。它源自于BASIC編程語(yǔ)言。VB擁有圖形用戶界面(GUI)和快速應(yīng)用程序開(kāi)發(fā)(RAD)系統(tǒng),可以輕易的使用DAO、RDO、ADO連接數(shù)據(jù)庫(kù),或者輕松的創(chuàng)建ActiveX控件。程序員可以輕松的使用VB提供的組件快速建立一個(gè)應(yīng)用程序。以下是學(xué)習(xí)啦小編今天為大家精心準(zhǔn)備的:淺談?dòng)肰B實(shí)現(xiàn)聊天討論室和點(diǎn)對(duì)點(diǎn)會(huì)話相關(guān)論文。內(nèi)容僅供參考,歡迎閱讀!

  淺談?dòng)肰B實(shí)現(xiàn)聊天討論室和點(diǎn)對(duì)點(diǎn)會(huì)話全文如下:

  在一個(gè)單位內(nèi)部或通過(guò)廣域協(xié)議(如X.25)互聯(lián)的行業(yè)內(nèi)部都有幾十或上萬(wàn)臺(tái)計(jì)算機(jī)互聯(lián),用Intranet雖然可以建立聊天室,但實(shí)現(xiàn)點(diǎn)對(duì)點(diǎn)實(shí)時(shí)對(duì)話卻比較困難。本人用Winsock和VB自制了一套聊天室和對(duì)話系統(tǒng),特拿來(lái)供同行們參考。

  一·Winsock的主要屬性、事件和方法

  Winsock是不可見(jiàn)控件,控件文件名是MSWINSCK.OCX,全稱為Mcirosoft winsock control,使用時(shí)要將此控件調(diào)入工具箱。

  1·屬性:①Protocol=0 //使用TCP協(xié)議;

 ?、赗emoteHost //準(zhǔn)備連接遠(yuǎn)程機(jī)的IP地址

  ③RemotePort //連接遠(yuǎn)程機(jī)的IP端口號(hào) (1024—65535之間)

 ?、躄ocalPort //本地機(jī)監(jiān)聽(tīng)I(yíng)P端口號(hào)必須與呼叫機(jī)端口號(hào)相同

  2·方法:①connect //申請(qǐng)連接遠(yuǎn)程機(jī)

 ?、趌isten //設(shè)置監(jiān)聽(tīng)

 ?、踑ccept //建立實(shí)際連接

  ④senddata //發(fā)送數(shù)據(jù)

 ?、輌etdata //接收數(shù)據(jù)

 ?、辌lose //關(guān)閉連接

  3·事件:①connectionrequest //一方請(qǐng)求連接時(shí)另一方產(chǎn)生

 ?、赾onnect //一方機(jī)接受連接時(shí)另一方產(chǎn)生

 ?、踓lose //一方機(jī)關(guān)閉連接時(shí)另一方產(chǎn)生

 ?、躣ataArrival //一方發(fā)送數(shù)據(jù)另一方產(chǎn)生

 ?、輊rror //請(qǐng)求連接失敗時(shí)產(chǎn)生

  二·制作方法

 ?、?在一工程中添加兩個(gè)表單form1(模擬客戶端)、form2(模擬服務(wù)器端)。

  form1中裝入控件:

  控件名

  主要屬性

  用 途

  VB.Form form1

  caption=”雷萌聊天室”

  controlbox=0 ‘False

  模擬客戶機(jī)表單

  VB.Textbox text1

  multiline=-1 ‘True

  scrollbars=3 ‘Bath

  用于輸入發(fā)往聊天室的信息

  VB.Textbox text2

  locked=-1 ‘True

  multiline=-1 ‘True

  scrollbars=3 ‘Bath

  顯示從聊天室發(fā)來(lái)的信息

  VB.Combobox combo1

  text=”10.84.234.11” ‘任定默認(rèn)地址

  放入常用的地址

  VB.Commandbutton comm1

  caption=”退出”

  最小化form1

  VB.Commandbutton comm2

  caption=”連接”

  請(qǐng)求與輸入的地址連接

  VB.Commandbutton send

  caption=”發(fā)送”

  發(fā)送Text1中的內(nèi)容

  VB.Label label1

  caption=“請(qǐng)?jiān)诖溯斎氚l(fā)表的信息”

  Text1的框標(biāo)

  VB.Label label2

  caption=“聊天室或?qū)Ψ降男畔?rdquo;

  Text2的框標(biāo)

  VB.Label label3

  caption=”等待連接”

  顯示連接狀態(tài)信息

  VB.Label label4

  caption=”聊天室或?qū)Ψ降刂?rdquo;

  用于指示Combo1

  VB.Label label5

  caption=”操作:選地址連接,連接成功看到聊天室內(nèi)容后再輸信息發(fā)送”

  操作說(shuō)明

  VB.Timer timer1

  interval=6000; enabled=false

  防止連接超時(shí)

  MSWinsocklib.winsock a

  用于數(shù)據(jù)傳輸

  form2中裝入控件:

  控件名

  主要屬性

  用 途

  VB.Form form2

  caption=”接收信息”

  controlbox=0 ‘False

  模擬客戶機(jī)表單

  VB.Commandbutton command1

  caption=”返回”

  隱含F(xiàn)orm2窗口

  VB.Commandbutton command2

  caption=”對(duì)話”

  點(diǎn)對(duì)點(diǎn)會(huì)話時(shí)用此直接啟動(dòng)Form1

  VB.Textbox text1

  locked=-1 ‘True

  multiline=-1 ‘True

  scrollbars=3 ‘Bath

  存放聊天或?qū)υ拑?nèi)容

  VB.Label label1

  caption=”接收的信息”

  Text1的框標(biāo)

  MSWinsocklib.Winsock a

  用于監(jiān)聽(tīng)

  MSWinsocklib.Winsock b

  用于傳送聊天信息

 ?、?在Form1的各控件事件中加入如下代碼:

  Dim flag As Boolean 注釋:連接狀態(tài)變量

  Private Sub a_Connect()

  flag = True

  End Sub

  Private Sub a_DataArrival(ByVal bytesTotal As Long)

  Dim i As String

  a.GetData i

  Label3.Caption = "連接成功!"

  Comm2.MousePointer = 0

  Form1.MousePointer = 0

  Timer1.Enabled = False

  If i = Chr(0) Then

  Text2.Text = "你是今天第一個(gè)進(jìn)入本聊天室的客戶。" + Chr(13) + Chr(10)

  Else

  Text2.Text = Text2.Text + i

  End If

  Text2.SelStart = Len(Text2.Text)

  Send.MousePointer = 0

  Combo1.Enabled = False

  Comm2.Caption = "斷開(kāi)連接"

  Text1.SetFocus

  End Sub

  Private Sub a_Error(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)

  flag = False

  Timer1.Enabled = False

  Comm2.MousePointer = 0

  Form1.MousePointer = 0

  MsgBox "網(wǎng)絡(luò)連接失敗 !"

  Label3.Caption = "等待連接"

  Combo1.Enabled = True

  Combo1.SetFocus

  a.Close

  Comm2.Caption = "連接"

  End Sub

  Private Sub Comm1_Click()

  a.Close 注釋:關(guān)閉連接

  Form1.WindowState = 1

  End Sub

  Private Sub Comm2_Click()

  If Comm2.Caption = "斷開(kāi)連接" Then

  a.Close

  Comm2.Caption = "連接"

  Label3.Caption = "等待連接"

  Combo1.Enabled = True

  Timer1.Enabled = False

  Comm2.MousePointer = 0

  Form1.MousePointer = 0

  Else

  Text2.Text = ""

  Label3.Caption = "正在連接.."

  Comm2.MousePointer = 11

  Form1.MousePointer = 11

  Timer1.Enabled = True

  flag = False

  a.Protocol = sckTCPProtocol

  a.RemoteHost = Combo1.Text

  a.RemotePort = 3000

  a.Connect

  End If

  End Sub

  Private Sub Form_DblClick()

  If MsgBox("關(guān)閉本聊天室! 確認(rèn)嗎?", 36, "退出系統(tǒng)") = 6 Then

  End

  Else

  Form1.WindowState = 1

  End If

  End Sub

  Private Sub Form_Load()

  If App.PrevInstance Then

  MsgBox "本系統(tǒng)已經(jīng)加載,請(qǐng)看任務(wù)攔!", 48, "提示"

  End

  End If

  flag = False

  Load Form2 ‘讀入form2進(jìn)入監(jiān)聽(tīng)

  End Sub

  Private Sub Send_Click()

  Dim S As String

  On Error GoTo ffff ‘防止鏈路中斷

  Send.MousePointer = 11

  If Right(Text1.Text, 1) <> Chr(10) Then

  S = Text1.Text + Chr(13) + Chr(10)

  Else

  S = Text1.Text

  End If

  If flag Then

  a.SendData S

  End If

  Exit Sub

  ffff:

  MsgBox "連接中斷!", 48, "提示"

  a.Close

  Send.MousePointer = 0

  Comm2.Caption = "連接"

  Label3.Caption = "等待連接"

  Combo1.Enabled = True

  Comm2.MousePointer = 0

  Form1.MousePointer = 0

  Exit Sub

  End Sub

  Private Sub Timer1_Timer()

  flag = False

  Timer1.Enabled = False

  Comm2.MousePointer = 0

  Form1.MousePointer = 0

  MsgBox "網(wǎng)絡(luò)連接失敗(超時(shí)) !"

  Label3.Caption = "等待連接"

  Combo1.Enabled = True

  Combo1.SetFocus

  a.Close

  Comm2.Caption = "連接"

  End Sub

 ?、?在Form2的各控件事件中加入如下代碼:

  Const maxn = 200 ‘最大同時(shí)連接本機(jī)的客戶數(shù)

  Dim user(maxn) As Boolean

  Private Sub Command1_Click()

  Form2.Hide

  End Sub

  Private Sub Command2_Click()

  Load Form1

  Form1.Show

  End Sub

  Private Sub Form_Load()

  Dim str1 As String

  Form2.Caption = "雷萌通信軟件"

  注釋:winsock控件 a 作為服務(wù)器程序監(jiān)聽(tīng)

  a.LocalPort = 3000

  a.Listen

  End Sub

  Private Sub a_ConnectionRequest(ByVal requestID As Long)

  Dim i As Long

  For i = 1 To maxn ‘當(dāng)一客戶請(qǐng)求時(shí)給啟動(dòng)一Winsock控件標(biāo)志號(hào)

  If Not user(i) Then

  user(i) = True

  Exit For

  End If

  Next i

  If i > maxn Then

  Exit Sub

  End If

  Load b(i) ‘當(dāng)一客戶請(qǐng)求時(shí)啟動(dòng)一Winsock控件

  b(i).Accept requestID 注釋:實(shí)際建立連接

  If Text1.Text = "" Then 注釋:發(fā)送數(shù)據(jù)

  b(i).SendData Chr(0)

  Else

  b(i).SendData Text1.Text

  End If

  Form2.Show

  End Sub

  Private Sub s_Close(Index As Integer)

  b(Index).Close 注釋:關(guān)閉連接

  Unload b(Index) 注釋:卸載 一個(gè)WinSock 控件

  user(Index) = False

  End Sub

  Private Sub b_DataArrival(Index As Integer, ByVal bytesTotal As Long)

  Dim str As String

  Dim i As Long

  b(Index).GetData str

  Text1.Text = Text1.Text + str

  For i = 1 To maxn

  If user(i) Then

  b(i).SendData str

  End If

  Next i

  End Sub

  三·運(yùn)行

  本程序在VB6.0中編譯通過(guò),運(yùn)行后最小化到任務(wù)欄上,也可以用API的Shell_Notifyicon 函數(shù)做入右下角的指示器欄中常駐內(nèi)存。你可以在網(wǎng)絡(luò)中用一個(gè)固定的機(jī)器地址作為聊天討論室,其他用戶都選該機(jī)地址連接進(jìn)入該室聊天或討論。各用戶也可選各自熟悉的地址進(jìn)行連接對(duì)話,雙擊form1空白處從內(nèi)存中撤出系統(tǒng)。根據(jù)同樣的原理可以制作電子郵件系統(tǒng)。

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