【正文】 feet, and silence succeeded to the bustling life which had till then filled the Aberfoyle mines. One man alone remained by James Starr. This was the overman, Simon Ford. Near him stood a boy, about fifteen years of age, who for some years already had been employed down below. James Starr and Simon Ford knew and esteemed each other well. Goodby, Simon, said the engineer. Goodby, Mr. Starr, r。 but the consumption had so increased during the last few years, that certain beds had been exhausted even to their smallest veins. Now deserted, these mines perforated the ground with their useless shafts and forsaken galleries. This was exactly the case with the pits of Aberfoyle. Ten years before, the last butty had raised the last ton of coal from this colliery. The underground working stock, traction engines, trucks which run on rails along the galleries, subterranean tramways, frames to support the shaft, pipes in short, all that constituted the machinery of a mine had been brought up from its depths. The exhausted mine was like the body of a huge fantasticallyshaped mastodon, from which all the ans of life have been taken, and only the skeleton remains. Nothing was left but long wooden ladders, down the Yarrow shaft the s, carpenters, outside and inside laborers, women, children, and old men, all were collected in the great yard of the Dochart pit, formerly heaped with coal from the mine. Many of these families had existed for generations in the mine of old Aberfoyle。F has sixtyeight thousand employees in Ilium. That calls for a lot of lenses and a lot of frames. Frames are where the money istion of coalmines was far distant and there was no dread of scarcity. There were still extensive mines to be worked in the two Americas. The manufactories, appropriated to so many different uses, lootives, steamers, gas works, amp。 特此聲明！ 作者簽名： 年 月 日 第 24 頁(yè) 共 23 頁(yè) Billy saw service with the infantry in Europe, and was taken prisoner by the Germans. After his honorable discharge from the Army in 1945, Billy again enrolled in the Ilium School of Optometry. During his senior year there, he became engaged to the daughter of the founder and owner of the schoo l, and then suffered a mild nervous collapse. He was treated in a veterans39。 （ 5）學(xué)校可以公布學(xué)位論文的全部或部分內(nèi)容（保密學(xué)位論文在解密后遵守此規(guī)定）。 （ 3）學(xué)校可以學(xué)術(shù)交流為目的復(fù)制、贈(zèng)送和交換學(xué)位論文。 關(guān)于學(xué)位論文使用權(quán)和研究成果知識(shí)產(chǎn)權(quán)的說(shuō)明： 本人完全了解成都信息工程學(xué)院有關(guān)保管使用 學(xué)位論文的規(guī)定，其中包括： （ 1）學(xué)校有權(quán)保管并向有關(guān)部門遞交學(xué)位論文的原件與復(fù)印件。文中除了特別加以標(biāo)注地方外，不包含他人已經(jīng)發(fā)表或撰寫過(guò)的研究成果，也不包含為獲得成都信息工程學(xué)院或其他教學(xué)機(jī)構(gòu)的學(xué)位或證書而使用過(guò)的材料。在此向他們表示我最衷心的感謝！ 感謝我的同學(xué)在系統(tǒng)開發(fā)過(guò)程中給予的幫助，正是因?yàn)樗膸椭?，使我遇到的一些意想不到的難題和疑惑被一個(gè)個(gè)的攻破，使我的課題得以順利地完全地達(dá)到了預(yù)期的目標(biāo)，并使論文最終得以順利地完成。 [7] 龔赤兵 . [M].北京：人民郵電 出版社 ,2021。 [5] Richard [M].北京：清華大學(xué) 出版社 ,2021。 [3] [M].北京：清華大學(xué) 出版社 ,2021。 參考文獻(xiàn) [1] 方睿 ,刁仁 宏 .網(wǎng)絡(luò)數(shù)據(jù)庫(kù)原理及應(yīng)用 [M].成都：四川大學(xué)出版社 ,2021。編碼的錯(cuò)誤容易查出，但設(shè)計(jì)的錯(cuò)誤如果帶到編碼階段就會(huì)使錯(cuò)誤逐步擴(kuò)大，最終很可能造成嚴(yán)重的后果。同時(shí)，在編碼過(guò)程中編寫一些公共類函數(shù)，提供統(tǒng)一的數(shù)據(jù)讀寫機(jī)制，以提高代碼重用率。代碼重用是近年來(lái)軟件工程領(lǐng)域一直提倡的開發(fā)方法。因此在今后的工作 中 ,這些功能的實(shí)現(xiàn)還需要更高的技術(shù)支持，也只有這樣 才能完善網(wǎng)上 圖書預(yù)約 系統(tǒng)。 本文簡(jiǎn)要介紹了典型 B/S網(wǎng) 第 21 頁(yè) 共 23 頁(yè) 上圖書預(yù)約 系統(tǒng)的主要體系結(jié)構(gòu)及功能模塊 ,重點(diǎn)討論了系 統(tǒng)開發(fā)工具、開發(fā)語(yǔ)言等關(guān)鍵技術(shù)以及系統(tǒng)的數(shù)據(jù)庫(kù)建設(shè) 和功 能模塊的代碼分析。 結(jié) 論 在歷經(jīng) 三 個(gè)多月的 需求分析、 結(jié)構(gòu)設(shè)計(jì)，到詳細(xì)編碼和系統(tǒng)測(cè)試， 最終 完成了整個(gè) 網(wǎng)上圖書預(yù)約系統(tǒng) 的設(shè)計(jì)。 （ 7）權(quán)限控制，通過(guò) Session 會(huì)話變量對(duì)管理員和用戶的權(quán)限進(jìn)行控制。 （ 5）對(duì)數(shù)據(jù)庫(kù)更新操作異常進(jìn)行捕捉。 （ 3）對(duì)數(shù)據(jù)庫(kù)查詢操作異常進(jìn)行捕捉。凡是遇到無(wú)效或是空值數(shù)據(jù)都需要用程序 進(jìn)行操作處理 。目的是讓整個(gè)系統(tǒng)能夠快速、穩(wěn)定、安全的運(yùn)行。 建議用戶 CPU PⅣ ，內(nèi)存 256M 及以上，數(shù)據(jù)庫(kù)版本 SQL SERVER 2021， WIN2021PRO/XP/2021， WIN2021 SERVER 及以上軟硬件平臺(tái)使用。 第 20 頁(yè) 共 23 頁(yè) 角色權(quán)限管理頁(yè)面的主界面圖 圖 14 角色權(quán)限管理界面 總結(jié)：針對(duì)具體每個(gè)模塊的功能進(jìn)行詳細(xì)的介紹。 + + 39。 圖書編輯頁(yè)面的主界面圖 圖 13 圖書編輯界面 系統(tǒng)管理模塊的設(shè)計(jì) 功能描述 系統(tǒng)管理模塊包括用戶信息管理和角色權(quán)限管理兩個(gè)功能。 添加圖書頁(yè)面主要是在AddBtn_Click()函數(shù)處理用戶單擊“添加”按鈕事件，將用戶輸入的圖書信息組成 SQL 語(yǔ)句，然后插入數(shù)據(jù)庫(kù)中；圖書編輯頁(yè)面將該頁(yè)面左側(cè)的 ListBox 控件跟數(shù)據(jù)庫(kù)進(jìn)行綁定，用以顯示所有圖書列表，當(dāng)用戶單擊某一圖書后，自動(dòng)將圖書信息填充到右邊的圖書信息明細(xì)中，用戶可對(duì)其進(jìn)行更新和刪除操作。用戶在規(guī)定時(shí)間內(nèi)去借閱已經(jīng)預(yù)約成功的圖書后，其預(yù)約狀態(tài)將修改為 “ 失效 ” ；反之，如果用戶沒(méi)有在規(guī)定時(shí)間內(nèi)去借閱已經(jīng)預(yù)約成功的圖書，則他的預(yù)約狀態(tài)將修改為 “ 過(guò)期 ” 。 end sqlstr += from UserInfo a inner join BookingInfo b on = inner 第 17 頁(yè) 共 23 頁(yè) join BookInfo c sqlstr += on = where 0 order by desc Dim obj As DBController = New DBController (sqlstr, BookingGrid) End If End Sub 歷史預(yù)約信息控件 ()主要用來(lái)顯示用戶的失效和過(guò)期預(yù)約信息。 when 2 then 39。 when 1 then 39。其主要處理代碼如下： Private Sub Page_Load (ByVal sender As , ByVal e As ) Handles If Not IsPostBack Then Dim sqlstr As String = sqlstr += update BookingInfo set State = 2 where State = 1 and dateadd (day, 2, (BookID, BookingDate)) getDate ()” sqlstr += select , , , , sqlstr += , , returnDate = case sqlstr += when 0 then sqlstr += when 1 then () end, sqlstr += State = case when 0 then 39。 當(dāng)前預(yù)約信息 控件 ()主要用來(lái)顯示用戶的有效預(yù)約信息。 控件加載頁(yè)面 的設(shè)計(jì) 控件加載頁(yè)面中通過(guò) table 的單元格來(lái)控制控件的加載，在 TD中加runat=server，并為其添加 ID。 新書查詢頁(yè)面 的設(shè)計(jì) 在該頁(yè)面中，只需添加一個(gè)下拉框，讓用戶在下拉框中選擇時(shí)間，提供查詢按鈕，在 Datagram 中顯示出來(lái)，對(duì) DataGrid 進(jìn)行數(shù)據(jù)綁定函數(shù)以提供調(diào)用，在此 DataGrid 中實(shí)現(xiàn)分頁(yè)、排序、查看圖書信息等功能。, + (i).Cells(6).Text + ,getdate(),0) End If Next Dim obj As DBController = New DBController (str) () End Sub 普通查詢頁(yè)面和高級(jí)查詢頁(yè)面的設(shè)計(jì) 這兩個(gè)頁(yè)面與簡(jiǎn)單查詢頁(yè)面的設(shè)計(jì)只是其查詢的 條件 有所不同 。)) insert into BookingInfo (UserID,BookID,BookingDate,BookingState) values(39。其主要處理代碼如下： Private Sub BookingBtn_Click (ByVal sender As , ByVal e As ) Handles Dim i As Integer Dim userID As String = Session (UserID) Dim str As String = Dim myCheckBox As CheckBox For i = 0 To 1 myCheckBox = CType ( (i).FindControl (ChckBox), CheckBox) If = True Then str += if(not exists(select 1 from BookingInfo where bookid= + (i).Cells(6).Text + and userid=39。 End If Session (sqlstr) = sqlstr BindGrid () End Sub 查看預(yù)約信息 NO 用戶登錄 查詢圖書 預(yù)約