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畢業(yè)設(shè)計(jì)-公交車查詢管理系統(tǒng)—論文(存儲(chǔ)版)

  

【正文】 參考文獻(xiàn) ??????????????????? 49 摘 要 隨著經(jīng)濟(jì)的發(fā)展,社會(huì)的進(jìn)步,計(jì)算機(jī)越來(lái)越深入到我們?nèi)粘5墓ぷ鲗W(xué)習(xí)及生活中,成為我們?nèi)粘I钪胁豢扇鄙俚妮o助工具。 公交車查詢 管理系統(tǒng)用計(jì)算機(jī)管理 公交車路線信息 的一種計(jì)算機(jī)應(yīng)用技術(shù)的創(chuàng)新 ,在計(jì)算機(jī)還未普及之前 公交車查詢 管理都是由工作人們?nèi)斯げ樵?的方式來(lái)操作的 .現(xiàn)在一般的 公交車查詢 都采用計(jì)算機(jī)智能化管理 ,采用計(jì)算機(jī)作為工具的實(shí)用的計(jì)算機(jī) 路線自動(dòng) 管理程序來(lái)幫助 人們 進(jìn)行更有效的 公交車路線查詢 。對(duì)于前者要求建立起數(shù)據(jù)一致性和完整性強(qiáng)、數(shù)據(jù)安全性好的庫(kù)。 4) Backcolor 屬性:用來(lái)改變?cè)诎粹o上顯示圖像的背景色。如果是命令按鈕的控件是數(shù)組,則需要使用 Index 參數(shù)標(biāo)識(shí)該控件。 2) Autosize 屬性:決定控件是否自動(dòng)改變大小以顯示其全部?jī)?nèi)容。 7) Keypress:事件由用戶在文本框控件中按任意鍵觸發(fā)。 7) Appearance 屬性:設(shè)置 /返回一個(gè)對(duì)象在運(yùn)行時(shí)是否以 3D 效果顯示。 15) Font 屬性:設(shè)置 /返回字體屬性。 24) MousePointer 屬性:設(shè)置 /返回一個(gè)值,該值指示在運(yùn)行時(shí)當(dāng)鼠標(biāo)移動(dòng)到對(duì)象上時(shí)顯示的指針類型。 8) KeyUp 事件: 當(dāng)控件具有焦點(diǎn)時(shí)釋放一個(gè)鍵時(shí)發(fā)生。 6) DataField 屬性:設(shè)置或返回?cái)?shù)據(jù)使用者將被綁定到的字段名。 14) Name 屬性:設(shè)置或返回控件的標(biāo)識(shí)名。 ? 框架類的控件: 1) List 屬性:列表框 控件的表項(xiàng)是使用數(shù)組的方式保存 ,數(shù)組的每一個(gè)元素存儲(chǔ)列表控件的一個(gè)表項(xiàng) 1) Listcount 屬性 :控件列表部分項(xiàng)目的個(gè)數(shù)。三是 : 利用 DataEnvironment 進(jìn)行數(shù)據(jù)庫(kù)鏈接 .四是 利用 ADO(ActiveX Data Objects)進(jìn)行編程 :現(xiàn)在我們來(lái)大致對(duì)這幾種技術(shù)應(yīng)用介紹: 一、 用 data 控件進(jìn)行數(shù)據(jù)庫(kù)鏈接 . 第一步:給窗體添加一個(gè) Data 控件。 結(jié)構(gòu)化查詢語(yǔ)言 SQL( Structured Query Language)是一種介于關(guān)系代數(shù)與關(guān)系演算之間的語(yǔ)言,其功能包括查詢、操縱、定義和控制四個(gè)方面,是一個(gè)通用的、功能極強(qiáng)的關(guān)系數(shù)據(jù)庫(kù)語(yǔ)言。在打開(kāi)一個(gè)窗體時(shí), Microsoft Access 將從一個(gè)或多個(gè)表中檢 索數(shù)據(jù),并使用用戶在 “ 窗體向?qū)?” 選擇的版面布局或所創(chuàng)建的版面布局,將窗體顯示在屏幕上。 這樣做的好處是可以大大提高效率,如果每次啟動(dòng)都要重新檢索數(shù)據(jù)庫(kù),則要花費(fèi)大量的時(shí)間 If IsBeginS = False Then 39。該過(guò)程用到了遞歸主要是由于起始站和終點(diǎn)站可以互換 digein = digein + 1 39。 amp。還有要注意的一點(diǎn)是在顯示出了最近車站的線路后,為了返回開(kāi)始查詢到的線路,我用了 MSF1(i)做為存儲(chǔ) Dim intmin As Integer Dim intcount As Integer Dim alloks() As Integer Dim rs As Integer Dim oksn As Integer Dim strbij As String Dim bfin As Boolean intmin = 10000 If gcaf = 2 Then If = 查找經(jīng)過(guò)站點(diǎn)最小的線路 Then = 返回 oksn = 0 If MSF1(0).Visible = True Then ReDim alloks(MSF1(0).Rows) MSF1(1).Clear MSF1(1).Rows = MSF1(0).Rows For k = 0 To MSF1(0).Rows 1 intcount = 9999 bfin = False For t = 0 To NC + 2 If MSF1(0).TextMatrix(k, t) = Then Exit For End If MSF1(1).TextMatrix(k, t) = MSF1(0).TextMatrix(k, t) If bfin = False Then If = MSF1(0).TextMatrix(k, t) Or = MSF1(0).TextMatrix(k, t) Then If intcount = 9999 Then intcount = 0 Else intcount = intcount + 1 bfin = True End If Else If intcount 9999 Then intcount = intcount + 1 End If End If End If Next MSF1(1).TextMatrix(k, NC + 2) = MSF1(0).TextMatrix(k, NC + 2) alloks(oksn) = intcount oksn = oksn + 1 If intcount intmin Then intmin = intcount End If Next MSF1(0).Clear rs = 1 With MSF1(0) .TextMatrix(0, 1) = 車次 For k = 1 To NC + 1 .TextMatrix(0, k + 1) = 站 amp。以下代碼寫(xiě)得不是很好 ,有點(diǎn)亂的感覺(jué) 39。該算法有一大好處是極大的提高了查詢的速度,因?yàn)?,在掃描整個(gè)數(shù)據(jù)庫(kù)時(shí),沒(méi)有內(nèi)循環(huán)。用于顯示按起始站和終點(diǎn)站進(jìn)行的查詢 39。 并把這些車站名存放在一文本框中,以用于下次讀取 39。查詢的同時(shí)也可以更新或刪除多條記錄,并對(duì)數(shù)據(jù)執(zhí)行內(nèi)嵌或自定義的計(jì)算。在數(shù)據(jù)庫(kù)發(fā)展的歷史上,最重要的成就就是關(guān)系模型。 2) Enable 屬性 :為 true 時(shí) (缺省值 ),激活定時(shí)器開(kāi)始計(jì)時(shí) 。 5) OLECompleteDrag 事件:當(dāng)源部件被放到目標(biāo)時(shí)發(fā)生,并通知源部件拖放操作被執(zhí)行或取消。 12) DragMode 屬性:設(shè)置返回一個(gè)值,確定在拖放操作中所用方式。 2) Index 屬性 :該屬性值為復(fù)選框控件數(shù)組的下標(biāo) . 3) Value 屬性 :value 為 0 表空白 ,為 1 表勾號(hào) ,為 2 表示灰色勾號(hào) . 4) Container 屬性: Form 控件上的容器。 6) LostFocus 事件:當(dāng)對(duì)象失去焦點(diǎn)時(shí)發(fā)生。 21) FontSize 屬性:設(shè)置 /返回控件中顯示文本所用的字體大小 22) Height 屬性:設(shè)置 /返回控件的高度。 13) DownPicture 屬性:設(shè)置 /返回一個(gè)對(duì)圖片的引用,該圖片在控件單擊下處于壓下?tīng)顟B(tài)時(shí)顯示。 5) Tabindex 屬性:建立控件時(shí) ,vb 自動(dòng)為其分配一個(gè) tabindex 值 ,利用tab 鍵可以在控件之間切換焦點(diǎn)。 5) Passwordchar 屬性:該 屬性設(shè)定輸入文本的特殊顯示字符 ,在設(shè)計(jì)密碼程序時(shí)非常有用。 9) MouseUp 事件:當(dāng)在命令按鈕上釋放鼠標(biāo)按鈕時(shí)發(fā)生。命令按鈕的 Click 事件僅對(duì)當(dāng)單擊鼠標(biāo)時(shí)發(fā) 生。 2) Enable 屬性:控制控件的激活狀態(tài)灰色或可用。 關(guān)鍵字 :公交車查詢 管理 ,MIS,visual basic ,數(shù)據(jù)庫(kù) Abstract With economic development, social progress, the puter and went to work learning and our daily lives, we bee an indispensable tool in everyday life. As science and technology continue to improve, puter science increasingly mature, and its powerful functions for the people to deeply understand that it has entered human society in various fields and is playing an increasingly important role. It has to go down to the daily work and life, such as word processing, information management, aided design, graphics and video processing, as well as education and training game entertainment. All people without special training will be able to use puters to plete numerous plex. However, although now the world has been filled with an overabundance of software, but they still can not meet the special needs of the various users, it also had to develop software suited to their particular needs. Professional Windows application software development before the work is needed in many professional knowledge and petence through special training. Different now, even if you have not received strict procedures designed training, the use of Visual Basic also like to develop a powerful, and suited to their special needs applications. Visual Basic inherited Basic language learn userfriendly features, and are particularly suited to new learner learning Windows system programming. Transportation vehicles using puter management information management system of a puter model cars line information technology application innovation in the puter before the public has not yet universal car enquiries are managed by the working people to operate manual enquiries. Now the general public enquiries have adopted puter intelligent vehicle management using the puter as a tool for automatic puter line management procedures to help people more effectively model cars line enquiries. Public enquiry management system is a typical car information management system (MIS), including its main development background to the establishment and maintenance of the database and frontend application development 2. The request for the establishment of strong data consistency and integrity, good for the security of the data. For the latter request applications functions, such as easy to use features. After
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