計(jì)算機(jī)畢業(yè)論文外文翻譯

1、<p><b>　　外文文獻(xiàn)原文</b></p><p>　　What is ASP.NET? </p><p>　　ASP.NET is a programming framework built on the common language runtime that can be used on a server to build powerful We

2、b applications. ASP.NET offers several important advantages over previous Web development models:</p><p>　　Enhanced Performance. ASP.NET is compiled common language runtime code running on the server. Unlike

3、 its interpreted predecessors, ASP.NET can take advantage of early binding, just-in-time compilation, native optimization, and caching services right out of the box. This amounts to dramatically better performance before

4、 you ever write a line of code.</p><p>　　World-Class Tool Support. The ASP.NET framework is complemented by a rich toolbox and designer in the Visual Studio integrated development environment. WYSIWYG editin

5、g, drag-and-drop server controls, and automatic deployment are just a few of the features this powerful tool provides.</p><p>　　Power and Flexibility. Because ASP.NET is based on the common language runtime,

6、 the power and flexibility of that entire platform is available to Web application developers. The .NET Framework class library, Messaging, and Data Access solutions are all seamlessly accessible from the Web. ASP.NET is

7、 also language-independent, so you can choose the language that best applies to your application or partition your application across many languages. Further, common language runtime interoperability g</p><p&g

8、t;　　Simplicity. ASP.NET makes it easy to perform common tasks, from simple form submission and client authentication to deployment and site configuration. For example, the ASP.NET page framework allows you to build user

9、interfaces that cleanly separate application logic from presentation code and to handle events in a simple, Visual Basic - like forms processing model. Additionally, the common language runtime simplifies development, wi

10、th managed code services such as automatic reference counting an</p><p>　　Manageability. ASP.NET employs a text-based, hierarchical configuration system, which simplifies applying settings to your server env

11、ironment and Web applications. Because configuration information is stored as plain text, new settings may be applied without the aid of local administration tools. This "zero local administration" philosophy e

12、xtends to deploying ASP.NET Framework applications as well. An ASP.NET Framework application is deployed to a server simply by copying the necessary files to</p><p>　　Scalability and Availability. ASP.NET ha

13、s been designed with scalability in mind, with features specifically tailored to improve performance in clustered and multiprocessor environments. Further, processes are closely monitored and managed by the ASP.NET runti

14、me, so that if one misbehaves (leaks, deadlocks), a new process can be created in its place, which helps keep your application constantly available to handle requests.</p><p>　　Customizability and Extensibil

15、ity. ASP.NET delivers a well-factored architecture that allows developers to "plug-in" their code at the appropriate level. In fact, it is possible to extend or replace any subcomponent of the ASP.NET runtime w

16、ith your own custom-written component. Implementing custom authentication or state services has never been easier.</p><p>　　Security. With built in Windows authentication and per-application configuration, y

17、ou can be assured that your applications are secure. </p><p>　　Data Binding Overview and Syntax </p><p>　　ASP.NET introduces a new declarative data binding syntax. This extremely flexible syntax

18、 permits the developer to bind not only to data sources, but also to simple properties, collections, expressions, and even results returned from method calls. The following table shows some examples of the new syntax. &l

19、t;/p><p>　　Although this syntax looks similar to the ASP shortcut for Response.Write -- <%= %> -- its behavior is quite different. Whereas the ASP Response.Write shortcut syntax was evaluated when the pag

20、e was processed, the ASP.NET data binding syntax is evaluated only when the DataBind method is invoked. </p><p>　　DataBind is a method of the Page and all server controls. When you call DataBind on a parent

21、control, it cascades to all of the children of the control. So, for example, DataList1.DataBind() invokes the DataBind method on each of the controls in the DataList templates. Calling DataBind on the Page -- Page.DataBi

22、nd() or simply DataBind() -- causes all data binding expressions on the page to be evaluated. DataBind is commonly called from the Page_Load event, as shown in the following example. </p><p>　　You can use a

23、binding expression almost anywhere in the declarative section of an .aspx page, provided it evaluates to the expected data type at run time. The simple property, expression, and method examples above display text to the

24、user when evaluated. In these cases, the data binding expression must evaluate to a value of type String. In the collection example, the data binding expression evaluates to a value of valid type for the DataSource prope

25、rty of ListBox. You might find it necessary to</p><p>　　Number of Records: <%# count.ToString() %> </p><p>　　Binding to Simple Properties </p><p>　　The ASP.NET data binding sy

26、ntax supports binding to public variables, properties of the Page, and properties of other controls on the page. </p><p>　　The following example illustrates binding to a public variable and simple property o

27、n the page. Note that these values are initialized before DataBind() is called. </p><p>　　The following example illustrates binding to a property of another control. Binding to Collections and Lists </p&g

28、t;<p>　　List server controls like DataGrid, ListBox and HTMLSelect use a collection as a data source. The following examples illustrate binding to usual common language runtime collection types. These controls can

29、 bind only to collections that support the IEnumerable, ICollection, or IListSource interface. Most commonly, you'll bind to ArrayList, Hashtable, DataView and DataReader. </p><p>　　The following example

30、 illustrates binding to an ArrayList. </p><p>　　The following example illustrates binding to a DataView. Note that the DataView class is defined in the System.Data namespace. </p><p>　　The follo

31、wing example illustrates binding to a Hashtable. </p><p>　　Binding Expressions or Methods </p><p>　　Often, you'll want to manipulate data before binding to your page or a control. The follow

32、ing example illustrates binding to an expression and the return value of a method. </p><p>　　DataBinder.Eval </p><p>　　The ASP.NET framework supplies a static method that evaluates late-bound da

33、ta binding expressions and optionally formats the result as a string. DataBinder.Eval is convenient in that it eliminates much of the explicit casting the developer must do to coerce values to the desired data type. It i

34、s particularly useful when data binding controls within a templated list, because often both the data row and the data field must be cast. </p><p>　　Consider the following example, where an integer will be d

35、isplayed as a currency string. With the standard ASP.NET data binding syntax, you must first cast the type of the data row in order to retrieve the data field, IntegerValue. Next, this is passed as an argument to the Str

36、ing.Format method. </p><p>　　This syntax can be complex and difficult to remember. In contrast, DataBinder.Eval is simply a method with three arguments: the naming container for the data item, the data field

37、 name, and a format string. In a templated list like DataList, DataGrid, or Repeater, the naming container is always Container.DataItem. Page is another naming container that can be used with DataBinder.Eval. </p>

38、<p>　　The format string argument is optional. If it is omitted, DataBinder.Eval returns a value of type object, as shown in the following example. </p><p>　　It is important to note that DataBinder.Eval

39、 can carry a noticeable performance penalty over the standard data binding syntax because it uses late-bound reflection. Use DataBinder.Eval judiciously, especially when string formatting is not required. </p><

40、;p>　　Section Summary</p><p>　　The ASP.NET declarative data binding syntax uses the <%# %> notation. </p><p>　　You can bind to data sources, properties of the page or another control, co

41、llections, expressions, and results returned from method calls. </p><p>　　List controls can bind to collections that support the ICollection, IEnumerable, or IListSource interface, such as ArrayList, Hashtab

42、le, DataView, and DataReader. </p><p>　　DataBinder.Eval is a static method for late binding. Its syntax can be simpler than the standard data binding syntax, but performance is slower. </p><p>　

43、　Section Summary</p><p>　　The DataList and Repeater controls provide developers fine-tuned control over the rendering of data-bound lists. </p><p>　　Rendering of bound data is controlled using a

44、 template, such as the HeaderTemplate, FooterTemplate, or ItemTemplate. </p><p>　　The Repeater control is a general-purpose iterator, and does not insert anything in its rendering that is not contained in a

45、template. </p><p>　　The DataList control offers more control over the layout and style of items, and outputs its own rendering code for formatting. </p><p>　　The DataList supports the Select, Ed

46、it/Update/Cancel, and Item Command events, which can be handled at the page level by wiring event handlers to the DataList's Command events. </p><p>　　DataList supports a SelectedItemTemplate and EditIte

47、mTemplate for control over the rendering of a selected or editable item. </p><p>　　Controls can be programmatically retrieved from a template using the Control.FindControl method. This should be called on a

48、DataListItem retrieved from the DataList's Items collection.</p><p><b>　　外文文獻(xiàn)譯文</b></p><p>　　ASP.NET是什么？</p><p>　　ASP.NET是一個(gè)能在規(guī)劃好框架的服務(wù)器上建造強(qiáng)大的網(wǎng)絡(luò)應(yīng)用。</p><p&g

49、t;　　ASP.NET提供幾個(gè)重要的優(yōu)于以前的網(wǎng)絡(luò)發(fā)展模型之處：</p><p><b>　　"增強(qiáng)的性能。</b></p><p>　　ASP.NET能在服務(wù)器上編譯普通語(yǔ)言運(yùn)行環(huán)境</p><p>　　不象它的解釋前人ASP.NET能利用早的結(jié)合、just-in-time編輯，本國(guó)的最佳化，貯藏箱的全然的服務(wù)。Unlike its

50、 interpreted predecessors, ASP.NET can take advantage of early binding, just-in-time compilation, native optimization, and caching services right out of the box.</p><p>　　這數(shù)量對(duì)戲劇性地較好的性能在你曾寫一排密碼之前。</p>

51、<p>　　"世界第一流水平的工具支持。</p><p>　　ASP.NET的骨架在在視力的電影制片廠整體的發(fā)展環(huán)境方面的個(gè)有錢的工具箱和設(shè)計(jì)者旁是與補(bǔ)體連結(jié)的。</p><p>　　所見即所得編輯、drag-and-drop服務(wù)員控制和自動(dòng)的使用是剛才一特征很少這個(gè)強(qiáng)大的工具提供。</p><p><b>　　"力和柔性。&

52、lt;/b></p><p>　　因?yàn)锳SP.NET運(yùn)行時(shí)間以普通的語(yǔ)言為基礎(chǔ)，完全的臺(tái)是對(duì)網(wǎng)應(yīng)用啟發(fā)者有用的力和柔性。</p><p>　　。凈的骨架類圖書館，通知，數(shù)據(jù)通道解法從網(wǎng)全部是無(wú)縫地可以接近的。</p><p>　　ASP.NET也是語(yǔ)言獨(dú)立的，因此你能選擇語(yǔ)言最好地適用于你的應(yīng)用或橫過(guò)許多語(yǔ)言瓜分你的應(yīng)用。</p><p&g

53、t;　　更多地，普通的語(yǔ)言運(yùn)行時(shí)間相互操作性保證你的現(xiàn)存的對(duì)根據(jù)COM發(fā)展的投資當(dāng)?shù)紸SP.NET移時(shí)保存。</p><p><b>　　"簡(jiǎn)單性。</b></p><p>　　ASP.NET使從對(duì)使用和地點(diǎn)外形的簡(jiǎn)單的形式屈服于和顧客證實(shí)做普通的任務(wù)是容易的。</p><p>　　例如，ASP.NET的頁(yè)骨架允許你建造使用者界面從表

54、演密碼的干凈分離的應(yīng)用邏輯并觸摸事件在一簡(jiǎn)單的，可視化Basic如同形式處理模型。</p><p>　　另外，普通的語(yǔ)言運(yùn)行時(shí)間簡(jiǎn)化發(fā)展，同管理密碼服務(wù)像自動(dòng)的提及計(jì)算和垃圾收集。</p><p><b>　　"可管理性。</b></p><p>　　ASP.NET雇用一個(gè)根據(jù)正文、hierarchical外形系統(tǒng)，這簡(jiǎn)化應(yīng)用對(duì)你的服

55、務(wù)員環(huán)境和網(wǎng)應(yīng)用安置。</p><p>　　因?yàn)橥庑蜗⑹亲鳛榍宄恼馁A藏，新的安置可能沒有地方的管理工具的幫助被適用。</p><p>　　這"零地方的管理"哲學(xué)延長(zhǎng)到展開ASP.NET。同樣的凈的骨架應(yīng)用。</p><p>　　一ASP.NET的骨架應(yīng)用是以對(duì)服務(wù)員復(fù)制必要的文件對(duì)一個(gè)服務(wù)員簡(jiǎn)單地展開。</p><p&g

56、t;　　無(wú)服務(wù)員再起動(dòng)被需要，甚至展開或替換跑編輯了密碼。</p><p>　　"可量測(cè)性和可得到。</p><p>　　ASP.NET在頭腦方面已經(jīng)設(shè)計(jì)成有可量測(cè)性，有明確地簡(jiǎn)單明了的特征改進(jìn)在成群方面的性能和多處理機(jī)環(huán)境。</p><p>　　更多地，是緊密地的過(guò)程被小毒蛇監(jiān)視了并管理。凈的運(yùn)行時(shí)間，結(jié)果如果某人行為不端（漏僵持），一個(gè)新的過(guò)程能在幫助

57、保留經(jīng)常地可得到的你的應(yīng)用觸摸需要的它的地方創(chuàng)造了。</p><p>　　" Customizability和伸長(zhǎng)率。</p><p>　　ASP.NET送一個(gè)很好因素建筑那允許啟發(fā)者向他們的在適當(dāng)?shù)钠矫嬷幍拿艽a。</p><p>　　事實(shí)上，延長(zhǎng)或替換ASP.NET的任何亞成分是可能的。有你的自己的習(xí)慣寫成分的凈的運(yùn)行時(shí)間。</p>&l

58、t;p>　　實(shí)現(xiàn)定做的證實(shí)或國(guó)家的服務(wù)從未是更容易的。</p><p><b>　　"安全。</b></p><p>　　同在窗證實(shí)和per-application外形里建造，你能被保證你的應(yīng)用是安全的。</p><p>　　捆概觀和句法ASP.NET的數(shù)據(jù)。網(wǎng)介紹一個(gè)捆句法的新的宣言的數(shù)據(jù)。</p><p&

59、gt;　　這極端彈性的句法許可啟發(fā)者不僅僅到數(shù)據(jù)源捆，也對(duì)簡(jiǎn)單的屬性，收集、表示甚至結(jié)果從方法呼叫返回了。</p><p>　　接著的桌子展示一些新的句法的實(shí)例。</p><p>　　雖然這種句法顯得類似于ASP.NET為答復(fù)的shortcut的。寫-- < % = % > --它的行為是完全不同的。</p><p>　　而ASP.NET答復(fù)。寫shor

60、tcut句法當(dāng)頁(yè)加工了，ASP.NET時(shí)估計(jì)。捆句法的凈的數(shù)據(jù)當(dāng)DataBind方法祈禱時(shí)僅僅估計(jì)。</p><p>　　DataBind是一個(gè)頁(yè)和所有的服務(wù)員控制的方法。</p><p>　　當(dāng)你呼喚在一次父母控制上的DataBind時(shí)，它到所有的控制的孩子成瀑布落下。</p><p>　　如此，例如，DataList1。DataBind（）在DataList樣板

61、里在各控制上祈禱DataBind方法。</p><p>　　關(guān)于頁(yè)--頁(yè)的呼叫DataBind。DataBind（）或簡(jiǎn)單地DataBind（）--引起捆關(guān)于頁(yè)表示估計(jì)的所有的數(shù)據(jù)。</p><p>　　DataBind是普通從Page_Load事件，如所示在接著的實(shí)例方面呼喚了。</p><p>　　你能使用幾乎在任何地方次結(jié)合表示在宣言的部分一。aspx頁(yè)提供了

62、它對(duì)期望的數(shù)據(jù)在跑時(shí)間的類型估計(jì)。</p><p>　　簡(jiǎn)單的財(cái)產(chǎn)，表示和方法實(shí)例高于表演正文對(duì)使用者當(dāng)估計(jì)時(shí)。</p><p>　　在這些情況方面，捆表示的數(shù)據(jù)必須對(duì)一個(gè)類型繩的價(jià)值估計(jì)。</p><p>　　在收集實(shí)例方面，捆表示的數(shù)據(jù)對(duì)為L(zhǎng)istBox的DataSource財(cái)產(chǎn)的個(gè)有效的類型的價(jià)值估計(jì)。</p><p>　　你可能發(fā)現(xiàn)強(qiáng)

63、迫在你的結(jié)合表示里的價(jià)值的類型生產(chǎn)愿望結(jié)果是必要的。</p><p>　　例如，如果計(jì)算是一個(gè)整數(shù)：</p><p>　　記錄的數(shù)：< % #計(jì)數(shù)。ToString（）% >對(duì)簡(jiǎn)單的屬性捆ASP.NET。捆句法的凈的數(shù)據(jù)支持,對(duì)公眾的變量、頁(yè)的屬性和關(guān)于頁(yè)的別的控制的屬性捆。</p><p>　　接著的實(shí)例說(shuō)明對(duì)關(guān)于頁(yè)的個(gè)公眾的變量和簡(jiǎn)單的財(cái)產(chǎn)捆。<

64、;/p><p>　　注意這些價(jià)值在DataBind（）以前起始了呼喚。</p><p>　　接著的實(shí)例說(shuō)明對(duì)一個(gè)另一控制的財(cái)產(chǎn)捆。</p><p>　　對(duì)如同DataGrid、ListBox和HTMLSelect收集和目錄目錄服務(wù)員控制捆作為一個(gè)數(shù)據(jù)源使用一收集。</p><p>　　接著的實(shí)例說(shuō)明對(duì)通常的普通的語(yǔ)言運(yùn)行時(shí)間收集類型捆。</

65、p><p>　　這些控制能僅僅捆向收集那支持IEnumerable、ICollection或IListSource界面。</p><p>　　普通最多的，你將對(duì)ArrayList、Hashtable、DataView和DataReader捆。</p><p>　　接著的實(shí)例說(shuō)明對(duì)一個(gè)ArrayList捆。</p><p>　　接著的實(shí)例說(shuō)明對(duì)一個(gè)

66、DataView捆。</p><p>　　注意DataView類在系統(tǒng)方面給其定義。數(shù)據(jù)namespace。</p><p>　　接著的實(shí)例說(shuō)明對(duì)一個(gè)Hashtable捆。</p><p>　　經(jīng)常捆表示或方法，你在對(duì)你的頁(yè)或一次控制捆以前將想要操作數(shù)據(jù)。</p><p>　　接著的實(shí)例說(shuō)明對(duì)一次表示和一個(gè)方法的返回價(jià)值捆。</p>

67、;<p>　　DataBinder。EvalASP.NET供給一個(gè)靜的方法那估計(jì)遲的捆數(shù)據(jù)捆表示和隨意地版式象一條繩一樣的結(jié)果。</p><p>　　DataBinder。Eval是方便的在那它投啟發(fā)者的明白的更非常除去對(duì)愿望數(shù)據(jù)類型必須強(qiáng)迫價(jià)值。</p><p>　　當(dāng)數(shù)據(jù)捆在一張放樣目錄之內(nèi)控制，因?yàn)閿?shù)據(jù)行和數(shù)據(jù)領(lǐng)域必須經(jīng)常都投了時(shí)特別是有用的。</p>&

68、lt;p>　　作為一條通用繩一個(gè)整數(shù)將展示的地方，考慮接著的實(shí)例。</p><p>　　同標(biāo)準(zhǔn)的ASP.NET。捆句法的凈的數(shù)據(jù)，你對(duì)糾正錯(cuò)誤整齊必須首先投數(shù)據(jù)行的類型數(shù)據(jù)領(lǐng)域、IntegerValue。</p><p>　　其次，這作為一次對(duì)繩的討論被通過(guò)。版式方法。</p><p>　　這句法能是復(fù)雜的和困難的以便想起。</p><p&

69、gt;　　比較起來(lái)，DataBinder。Eval簡(jiǎn)單地是一個(gè)有關(guān)三次討論的方法：為數(shù)據(jù)項(xiàng)目的名字容器、數(shù)據(jù)領(lǐng)域名字和一條版式繩。</p><p>　　在一張如同DataList、DataGrid或重發(fā)器的放樣目錄里，名字容器總是是容器。DataItem。</p><p>　　頁(yè)是另一名字容器那能和DataBinder一起使用。Eval。</p><p>　　版式繩

70、討論是隨意的。</p><p>　　如果它省去了，DataBinder。Eval如所示在接著的實(shí)例方面返回一個(gè)類型物體的價(jià)值。</p><p>　　注意那DataBinder是重要的。因?yàn)樗褂眠t的捆反射, Eval在捆句法的標(biāo)準(zhǔn)的數(shù)據(jù)上能帶一次引人注意的性能懲罰。</p><p>　　使用DataBinder。Eval有見識(shí)地，特別當(dāng)繩格式不是需要時(shí)。</p

71、><p><b>　　部分總結(jié)</b></p><p>　　1。ASP.NET句法的凈的宣言的數(shù)據(jù)使用< % # % >符號(hào)。</p><p>　　2 .你能捆到數(shù)據(jù)源，頁(yè)或另一控制的屬性，收集，表示，結(jié)果從方法呼叫返回了。</p><p>　　3 .目錄控制能捆向收集那支持ICollection、IEnumer

72、able或IListSource界面，象ArrayList、Hashtable、DataView和DataReader。</p><p>　　4 . DataBinder。Eval是一個(gè)為遲的結(jié)合的靜的方法。</p><p>　　它的句法比捆句法的標(biāo)準(zhǔn)的數(shù)據(jù)能是簡(jiǎn)單的，而性能是慢慢地。</p><p>　　1。ASP.NET捆綁句法的凈的宣言的數(shù)據(jù)使用< %

73、# % >符號(hào)。</p><p>　　2 .你能捆到數(shù)據(jù)源，頁(yè)或另一控制的屬性，收集，表示，結(jié)果從方法呼叫返回了。</p><p>　　3 .目錄控制能捆向收集那支持ICollection、IEnumerable或IListSource界面，象ArrayList、Hashtable、DataView和DataReader。</p><p>　　4 . Data

74、Binder。Eval是一個(gè)為遲的結(jié)合的靜的方法。</p><p>　　它的句法比捆句法的標(biāo)準(zhǔn)的數(shù)據(jù)能是簡(jiǎn)單的，而性能是慢慢地。</p><p><b>　　部分總結(jié)</b></p><p>　　1。DataList和重發(fā)器控制提供啟發(fā)者調(diào)節(jié)了在數(shù)據(jù)捆目錄的提出上的控制。</p><p>　　2 .給予捆數(shù)據(jù)被控制使用一

75、個(gè)樣板，象HeaderTemplate、FooterTemplate或ItemTemplate。</p><p>　　3 .重發(fā)器控制是一個(gè)通用的iterator，不插入東西在它的提出那別是在一個(gè)樣板里包括。</p><p>　　4 . DataList控制在布置上提供更多控制和項(xiàng)目的風(fēng)格，產(chǎn)量它的自己的提出為格式的密碼。</p><p>　　5 . DataLis

76、t支持能被對(duì)Datalist的線路事件管理人在頁(yè)平面之處觸摸根據(jù)命令而作的事件的選擇，編輯/使/取消和同樣地根據(jù)命令而作的事件。</p><p>　　6 . DataList支持為在次選擇或editable項(xiàng)目的提出上的控制的個(gè)SelectedItemTemplate和EditItemTemplate。</p><p>　　7 .控制能前語(yǔ)法地從一個(gè)使用控制的樣板收回。FindContro