【正文】
fileString(CStr() amp。 。 has to successfully get Host Name. Exit Function End If sHostName = Trim$(sHostName) lpHost = gethostbyname(sHostName) If lpHost = 0 Then GetIPAddress = MsgBox Windows Sockets are not responding. amp。 amp。 : amp。 = adCmdTable = Messages/使adoUsers指向UserInfo表 = Provider=。系統(tǒng)介紹 客戶機(jī)/服務(wù)器模型介紹企業(yè)網(wǎng)上尋呼系統(tǒng)是一個(gè)典型的客戶機(jī)/服務(wù)器系統(tǒng). 客戶機(jī)/服務(wù)器模型概述 在Client/Server[4]計(jì)算模式中,一個(gè)或多個(gè)客戶機(jī)與一個(gè)或多個(gè)服務(wù)器,以及支持客戶機(jī)、服務(wù)器進(jìn)程通信的網(wǎng)絡(luò)操作系統(tǒng)共同組成了一個(gè)分布式計(jì)算、,應(yīng)用可以分為以下兩部分:(1)前端的客戶機(jī)部分(2)后端的服務(wù)器部分客戶機(jī)提出服務(wù)要求,網(wǎng)絡(luò)將用戶請(qǐng)求傳送到服務(wù)器;服務(wù)器執(zhí)行用戶請(qǐng)求,完成所要求的操作并將結(jié)果回送用戶. 客戶機(jī)/服務(wù)器中的中間件⑴中間件的基本概念Client/Server[12]模式與傳統(tǒng)的資源共享模式相比,具有以下幾個(gè)優(yōu)點(diǎn):①網(wǎng)絡(luò)通信量減少,響應(yīng)時(shí)間短,網(wǎng)絡(luò)能為用戶提供更好的服務(wù)質(zhì)量;②通過將一個(gè)應(yīng)用程序分別運(yùn)行在網(wǎng)絡(luò)互聯(lián)的服務(wù)器與客戶機(jī)上,可以充分發(fā)揮客戶機(jī)與+服務(wù)器雙方的功能,組成一個(gè)有效的分布式應(yīng)用環(huán)境;③通過將應(yīng)用程序與它們所處理的數(shù)據(jù)隔離,可以使數(shù)據(jù)具有很好的獨(dú)立性,可以方便的開發(fā)新的應(yīng)用.④將數(shù)據(jù)存放在服務(wù)器中,服務(wù)器可以對(duì)數(shù)據(jù)放在服務(wù)器中,服務(wù)器可以對(duì)數(shù)據(jù)訪問實(shí)現(xiàn)有效的管理與控制,未授權(quán)用戶無法對(duì)數(shù)據(jù)進(jìn)行非法訪問,系統(tǒng)數(shù)據(jù)的完整性得到了很好的保護(hù);⑤由于客戶機(jī)有自己的管理用戶界面,因此每個(gè)服務(wù)器可以支持更多的用戶.盡管Client/Server模式有很多優(yōu)點(diǎn),但是對(duì)于大多數(shù)從事應(yīng)用程序開發(fā)的程序員來說,編寫跨平臺(tái)、多協(xié)議、,如果程序員需要針對(duì)底層網(wǎng)絡(luò)協(xié)議來編寫應(yīng)用程序的話,也會(huì)帶來以下這兩個(gè)明顯的問題;(1) 程序過多地依賴底層網(wǎng)絡(luò)技術(shù).(2) 程序很難繼承新的網(wǎng)絡(luò)服務(wù).如果程序中有很多地方依賴于網(wǎng)絡(luò)協(xié)議與網(wǎng)絡(luò)軟件的話,那么這種程序就很難進(jìn)行編寫與維護(hù),。 wskServer(Index).Tag (Status).Value = 0 End IfUnload wskServer(Index)End Sub 4. 在窗體標(biāo)題中顯示在線用戶數(shù)目.Private Sub Timer1_Timer() = 在線用戶數(shù)目: amp。 (Time).Value amp。 CStr(Now) amp。 LTrim(Str(i)), UserID, 0, fileName) intLen= GetPrivateProfileString(CStr() amp。 [M]. HumboldtUniversit168。 . Next GetIPAddress = Mid$(sIPAddr, 1, Len(sIPAddr) 1) SocketsCleanupEnd Function 托盤圖標(biāo)顯示模塊托盤圖標(biāo)顯示模塊主要功能是托盤圖標(biāo)的添加、刪除、設(shè)置,:Public Sub AddToTray(frm As Form, mnu As Menu)Set TheForm = frmSet TheMenu = mnuOldWindowProc=SetWindowLong(,GWL_WNDPROC,AddressOf NewWindowProc)Shell_NotifyIcon NIM_ADD, IconDataEnd SubPublic Sub SetTrayIcon(pic As Picture) With IconData .hIcon = .uFlags = NIF_ICON End With Shell_NotifyIcon NIM_MODIFY, IconDataEnd SubPublic Sub SetTrayTip(tip As String) With IconData .szTip = tip amp。沒有該用戶! Else If (Status).Value = 1 Then wskServer(GetSocketIndexFromUserID(strUserID)).SendData ToUser。 CStr((UserFace).Value) (Status).Value = 1 wskServer(Index).Tag = strUserID Else wskServer(Index).SendData Login3: 該用戶已經(jīng)登錄! End If Else wskServer(Index).SendData Login3: 密碼不正確! End If End IfCase AddBadboy1: /代碼同“AddNewUser1”類似,這里不再贅述.Case GetMsg1: strUserID = wskServer(Index).Tag If And Then Exit Sub End If ReceivedID= amp。 amp。摘 要隨著網(wǎng)絡(luò)技術(shù)的不斷進(jìn)步和網(wǎng)絡(luò)成本的不斷降低,大多數(shù)企業(yè)都在鋪設(shè)網(wǎng)絡(luò),購置終端和服務(wù)器,發(fā)揮網(wǎng)絡(luò)優(yōu)勢(shì),促進(jìn)信息交流,、方便、充分、,在客戶機(jī)端程序完成用戶的注冊(cè)、登錄、發(fā)送消息、接受消息等;在服務(wù)器端程序完成客戶端信息的處理,包括注冊(cè)、登錄、,用Visual Basic[1]創(chuàng)建了系統(tǒng)所需的各模塊.關(guān)鍵詞:中間件 客戶機(jī)/服務(wù)器 尋呼 The Design and Implementation of Seekcalling System on the Enterprise NetAbstract:With the improvement of the network technique and the reducement of network cost continuously,majority business enterprises are all building the network,purchasing the terminal and the server in order to realize net conjunction with each the enterprise seekcalling system on the net,developping the network advantage,promoting the information exchanges,making the information of the business enterprise are very important parts in the course of the information construction. Seekcalling system on the net is based on the foundation of enterprise network system and the maturity of the network technique which is favor to the munication between the purpose of the implementation of the seekcalling system on the net is to save the time on information exchanges,convenience,well,so that it can increase the business enterprise efficiency of transacts .The system is a typical client/server system. At the user side,the system plete the user’s registration,login,send out the information and accept information the server side,the system plete the management of the user’s information which includes the registration,login,send the information from different person system establishes the database for needing with the Access and take the Visual Basic puter languages development tool. KeyWords:MiddleWare a client/server machine seekcalling目 錄中文摘要、關(guān)鍵詞…………………………………………(1)引言 ……………………………………………………(2)系統(tǒng)介紹 ………………………………………………(2) 客戶機(jī)服務(wù)器模型介紹………………………………(2) Winso