ASP NET入门C#版毕业论文外文文献翻译.docx
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ASP NET入门C#版毕业论文外文文献翻译.docx
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D科技译文
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… BeginningASP.NET2.0inC#
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… ASP(ActiveServerPages)isarelativelynewtechnologythat’salready
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… leaptthroughseveralstagesofevolution.Itwasintroducedaboutsevenyears
装
… agoasaneasywaytoadddynamiccontenttoordinarywebpages.Sincethen,
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… it’sgrownintosomethingmuchmoreambitious:
aplatformforcreating
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… advancedwebapplications,includingmerceshops,data.drivenportalsites,
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… andjustaboutanythingelseyoucanfindontheInternet.ASP.NET2.0isthe
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… latestversionofASP,anditrepresentsthemostdramaticchangeyet.With
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… ASP.NET,developersnolongerneedtopastetogetherajumbleofHTMLand
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… scriptcodeinordertoprogramtheWeb.Instead,youcancreatefull.scaleweb
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订 applicationsusingnothingbutcodeandadesigntoolsuchasVisualStudio2008
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… Thecostofallthisinnovationisthelearningcurve.Notonlydo youneedto
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… learnhowtouseanadvanceddesigntool(VisualStudio)andatoolkitofobjects
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… (the.NETFramework),youalsoneedtomasteraprogramminglanguagesuch
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… asC#.TheInternetbeganinthelate1960sasanexperiment.Itsgoalwasto
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… createatrulyresilientinformationnetwork—onethatcouldwithstandthelossof
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… severalcomputerswithoutpreventingtheothersfromcommunicating.Driven
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… bypotentialdisasterscenarios(suchasnuclearattack),theU.S.Departmentof
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… Defenseprovidedtheinitialfunding.TheearlyInternetwasmostlylimitedto
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… educationalinstitutionsanddefensecontractors.Itflourishedasatoolfor
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… academic collaboration, allowing researchers across the globe to share
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… information.Intheearly1990s,modemswerecreatedthatcouldworkoverexistingphonelines,andtheInternetbegantoopenuptocommercialusers.In
1993,thefirstHTMLbrowserwascreated,andtheInternetrevolutionbegan.It
… wouldbedifficulttodescribeearlywebsitesaswebapplications.Instead,the
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… firstgenerationofwebsitesoftenlookedmorelikebrochures,consistingmostly
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… offixedHTMLpagesthatneededtobeupdatedbyhand.BasicHTMLpageisa
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… littlelikeaword.processingdocument—itcontainsformattedcontentthatcanbe
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… displayedonyourcomputer,butitdoesn’tactuallydoanything.Thefollowing
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装 exampleshowsHTMLatitssimplest,withadocumentthatcontainsaheading
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… andsinglelineoftext:
AnHTMLdocumenthastwotypesofcontent:
thetext
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… andthetagsthattellthebrowserhowtoformatit.Thetagsareeasily
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… recognizable,becausetheyoccurinsideangledbrackets(<>).HTMLdefines
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… tagsfordifferentlevelsofheadings,paragraphs,hyperlinks,italicandbold
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… formatting,horizontallines,andsoon.Forexample,
SomeText
tells…
… thebrowsertodisplaySomeTextintheHeading1style,whichusesalarge,
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… boldfont.Figure1.1showsthesimpleHTMLpageinabrowser.HTML2.0
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… introducedthefirstseedofwebprogrammingwithatechnologycalledHTML
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… forms.HTMLformsexpandHTMLsothatitincludesnotonlyformattingtags
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… butalsotagsforgraphicalwidgets,orcontrols.Thesecontrolsincludecommon
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… ingredientssuchasdrop.downlists,textboxes,andbuttons.Here’sasample
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… web pagecreated with HTMLformcontrols:
HTMLforms allow web
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线 applicationdeveloperstodesignstandardinputpages.Whentheuserclicksthe
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… SubmitbuttononthepageshowninFigure1.2,allthedataintheinputcontrols
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… (inthiscase,thetwocheckboxes)ispatchedtogetherintoonelongstringand
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… senttothewebserver.Ontheserverside,acustomapplicationreceivesand
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… processesthedata.Amazinglyenough,thecontrolsthatwerecreatedforHTML
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… formsmorethantenyearsagoarestillthebasicfoundationthat you’lluseto
builddynamicASP.NETpages!
Thedifferenceisthetypeofapplicationthat
… runsontheserverside.Inthepast, whentheuserclickedabuttononaform
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… page,theinformationmighthavebeene.mailedtoasetaccountorsenttoan
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… applicationontheserverthatusedthechallengingCGI(CommonGateway
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… Interface)standard.Today,you’llworkwiththemuchmorecapableandelegant
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… ASP.NETplatform.TounderstandwhyASP.NETwascreated,ithelpsto
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装 understandtheproblemsofotherwebdevelopmenttechnologies.Withthe
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… originalCGIstandard,forexample,thewebservermustlaunchacompletely
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… separateinstanceoftheapplicationforeachwebrequest.Ifthewebsiteis
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… popular,thewebservermuststruggleundertheweightofhundredsofseparate
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… copiesoftheapplication,eventuallybecomingavictimof
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