【導讀】本論文主要論述的是基于WEB的選課系統(tǒng)的系統(tǒng)維護模塊的設計與實現(xiàn)。設計本系統(tǒng)的目的是對選課信息進行管理。份，數(shù)據(jù)還原，注銷等功能。系統(tǒng)在校園網(wǎng)上安全有效地運作。之后根據(jù)需求提出了系統(tǒng)管理模塊的總體設。計方案，并據(jù)此進行了詳細設計和編碼實現(xiàn)。代碼中通過使用進程中的Session、盡量使用存儲過程和盡量。減少數(shù)據(jù)庫連接的打開時間等手段來提高性能。系統(tǒng)開發(fā)完成后，對課題

　　

【正文】 較大難度、需要重點考慮的問題。 結(jié)論 29 結(jié)論 通過最后兩個多月的畢業(yè)設計，我對使用 開發(fā)頁面的能力有了很大提高。基本實現(xiàn)了學生選課系統(tǒng)所期望的功能，驗證也得到了預期的效果。 由于在此之前對于 和網(wǎng)頁知識的了解太少，從書本上學到的知識有限，所以從一開始就碰到許多困難。例如一開始我使用的是框架結(jié)構(gòu)，由于有許多的局限性，又想使用 中的頁面繼承，也沒有得到解決，最后使用 table 和 panel 控件解決了同一頁面鏈接不同的頁面。系統(tǒng)還原上也出現(xiàn)問題，由于系統(tǒng)正在使用，還原會出現(xiàn)排它訪問，導致不能進行還原，這就必修斷開與數(shù)據(jù)庫的連結(jié)，到 master 數(shù)據(jù)庫中進行還原，需要殺死系統(tǒng)所在數(shù)據(jù)庫的進程號，另外在網(wǎng)頁中腳本代碼與 html 代碼之間的關系上都有過很大的困難，通過在網(wǎng)上尋找有關資料以及 同學的幫助下最后都得到了解決。 在整個設計階段感受最為深刻的是掌握學習的方式和解決問題的方法。雖然面臨的信息很多，但是如何從大量的信息中篩選出所需的信息，有用的信息，才是解決問題的關鍵。 參考文獻 30 參考文獻 [1] 羅斌 . Visual Basic NET 精彩編程實例集錦 .中國水利水電出版社 , [2] 高春蓉 . 與 從入門到精通 .電子工業(yè)出版社 , [3] 楊浩 . 高級編程 .清華大學出版社 , [4] 尚俊杰 . 程序設 計 .清華大學出版社 , [5] 李偉紅 .SQL Server2020 數(shù)據(jù)庫及應用 .中國水利水電出版社 , [6] 龍懷冰 .SQL Server 2020 實用開發(fā)教程 .人民郵電出版社 , [7] Dan Kent . Evolution .Sams , [8] Mahesh Chand, David Talbot .Applied : Building DataDriven Solutions . Apress, [9] John Kauffman, Thiru Thangarathinam .Beginning Databases Beta Preview . Wrox, [10] 李存斌 .SQL Server 2020 實用教程 .中國水利水電出版社 , [11] 劉小偉 . 與 SQL Server 網(wǎng)站開發(fā)實用教程 .電子工業(yè)出版社 , [12] 戴志誠 .SQL Server 2020 數(shù)據(jù)庫系統(tǒng)開發(fā)與實例 .電子工業(yè)出版社 , [13] 賓晟 . 網(wǎng)絡程序開發(fā)原理與實踐教程 .電子工業(yè)出版社 , [14] Thiru Thangarathinam .Professional Databases. wrox, [15] (美 )Joseph ,Paul . SQL Server開發(fā)指南 .電子出版社 , [16] 宋昆 ,李嚴 . SQL Server數(shù)據(jù)庫開發(fā)實例解析 .機械工業(yè)出版社 , [17] 王穎 ,李敏業(yè) . Visual Basic + SQL Server數(shù)據(jù)庫應用實例完全解析 .人民郵電出版社 , [18] 董國平 ,顏志軍 . Visual Basic數(shù)據(jù)庫開發(fā)典型模塊與實例精講 .電子工業(yè)出版社 , 第四章 系統(tǒng)實現(xiàn)與驗證 31 致謝 歷經(jīng)兩個月的努力，在老師的悉心指導下，我們終于順利完成了畢業(yè)設計。這次畢業(yè)設計是對我們大學學習成果的考驗和總結(jié)，是我們實現(xiàn)理想之前的一次實戰(zhàn)，一次磨練，一次提高。從而讓我們對自己有了一個更加準確的認識，對專業(yè)知識有了一個更加融會貫通的理解，更為 下一階段的學習打下了一個重要的基礎。 在此，我們首先要向各位領導，老師致以最衷心的謝意！我們特別要感謝的是我們的畢業(yè)設計指導老師―王奉元老師和張冬梅老師，不辭辛苦的指導我們，啟發(fā)我們，幫助我們查找資料，為我們解答疑惑！在這里請讓我們懷著最大的誠意道一聲“您辛苦了，衷心地謝謝您！” ,感謝電子信息系的全體老師和同學多年來的關心和支持！ 第四章 系統(tǒng)實現(xiàn)與驗證 32 r, but fainter now and desperately the horn was blow ing. Fierce and shrill rose the yells of the Orcs, and suddenly the horncalls ceased. Aragorn raced down the last slope, but before he could reach the hill39。s foot, the sounds died away。 and as he turned to the left and ran towards them they retreated, until at last he could hear them no more. Drawing his bright sword and crying _Elendil! Elendil!_ he crashed through the trees. A mile, maybe, from Parth Galen in a little glade not far from the la ke he found Boromir. He was sitting with his back to a great tree, as if he was resting. But Aragorn saw that he was pierced with many blackfeathered arrows。 his sword was still in his hand, but it was broken near the hilt。 his horn cloven in two was at his side. Many Orcs lay slain, piled all about him and at his feet. Aragorn knelt beside him. Boromir opened his eyes and strove to speak. At last slow words came. 39。I tried to ta ke the Ring from Frodo 39。 he said. 39。I am sorry. I have paid.39。 His glance strayed to his fallen enemies。 twenty at least lay there. 39。They have gone: the Halflings: the Orcs have taken them. I think they are not dead. Orcs bound them.39。 He paused and his eyes closed wearily. Afte r a moment he spoke again. 39。Farewell, Aragorn! Go to Minas Tirith and save my people! I have failed.39。 39。No!39。 said Aragorn, taking his hand and kissing his brow. 39。You have conquered. Few have gained such a victory. Be at peace! Minas Tirith shall not fall!39。 Boromir smiled. 39。Which way did they go? Was Frodo there?39。 said Aragorn. But Boromir did not speak again. 39。Alas!39。 said Aragorn. 39。Thus passes the heir of Dehor, L ord of the Tower of Guard! This is a bitter end. Now the Company is all in ruin. It is I that have failed. Vain was Gandalf39。s trust in me. What shall I do now? Boromir has laid it on me to go to Minas Tirith, and my heart desires it。 but where are the Ring and the Bearer? How shall I find them and save the Quest from disaster?39。 He knelt for a while, bent with weeping, still clasping Boromir39。s hand. So it was that Legolas and Gimli found him. They came from the western slopes of the hill, silently, creeping through the trees as if they were hunting. G imli had his axe in hand, and Legolas his long knife: all his arrows were spent. When they came into the glade they halted in amazement。 and then they stood a moment with heads bowed in grief, for it seemed to them plain what had happened. 39。Alas!39。 said Legolas, ing to Aragorn39。s side. 39。We have hunted and slain many Orcs in the woods, but we should have been of more use here. We came when we heard the hornbut too late, it seems. I fear you have taken deadly hurt.39。 39。Boromir is dead,39。 said Aragorn. 39。I am unscathed, for I was not here with him. He fell defending the hobbits, while I was awa y upon the hill.39。 39。The hobbits!39。 cried Gimli 39。Where are they then? Where is Frodo?39。 39。I do not know,39。 answered Aragorn wearily. 39。Before he died Boromir told me that the Orcs had bound them。 he did not think tha t they were dead. I sent him to follow Merry and Pippin。 but I did not ask him if Frodo or Sam were with him: not until it was too late. All that I have done today has gone amiss. What is to be done now?39。 39。First we must tend the fallen,39。 said Legolas. 39。We cannot leave him lying like carrion among these foul Orcs.39。 39。But we must be swift,39。 said Gimli. 39。He would not wish us to linger. We must follow the Orcs, if there is hope that any of our Company are living prisoners.39。 39。But we do not know whether the Ringbearer is with them or not 39。 said Aragorn. 39。Are we to abandon him? Must we not seek him first? An evil choice is now before us!39。 39。Then let us do first what we must do,39。 said Legolas. 39。We have not the time or the tools to bury our rade fitly, or to raise a mound over him. A cairn we might build.39。 39。The labour would b