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1、ASPintroductionFrom1996ASPbirthtonowpast15years.Intheshortof15years,ASPtherearemajorchanges,untilnowtheasp.net.Thefirsteditionofaspis0.9beta,since1996,itgivesbirthASP1.0Webdevelopmentboundedbroughtgoodnews.EarlyWebapplicationdevelopmentisverytedious,thatshouldmakeasimpledynamicpa
2、gesneedtowritealotofCcodetocompletethisforordinaryprogrammerisalittletoodifficult.AnASPbutallowstheuseofthissimplescriptinglanguageadditionally,writethecodeembeddedinHTMLpages.InprogramminguseitsinternalcomponentstoachievesomeadvancedfunctionssuchasCookie).It'sthebiggestcontribut
3、ionliesinitsADO(ActiveXDataObject),thiscomponentmakestheprogramofthedatabaseoperationisverysimple,sothedynamicwebdesignalsobecomesaeasy.Thereforeovernight,Webdesignprogramisnolongerimaginedarduoustasks,asmanypeoplecandotheirstuff.In1998,MicrosofttoreleasetheASP2.0.ItispartofthePa
4、ckWindowsNT4Option,asIIS4.0ofmodule.inaccessories.ItwithASP1.0arethemaindifferencebetweenitsexternalcomponentscanbeinitialized,sothatintheASPprogramofallinternalcomponentshaveindependentmemoryspace,andavailableforthetransaction.By2000,withtheWindows2000successrelease,theoperating
5、systemIIS5.0achincidentASP3.0alsobeginspopularity.ComparedwithASP2.0,ASP3.0advantageliesinitUSEStheCOM+,henceitseffectivenessisbetterthanitsfrontversion,andmorestable.In2001,asp.netappeared.Inthefirstdevelopment,itisthenameoftheASP+,buttowithMicrosoft.netplan,andtoshowthatmatchth
6、eASPversionisnottoASP3.0complement,Microsoftwillitsnamedasp.net.Asp.netonthestructureandinfrontoftheversioniswidelydivergent,italmostentirelybasedonthecomponentsandmodular,Webapplicationsdevelopersusethisdevelopmentenvironmentcanrealizemoremodular,morepowerfulapplication.Aswebdev
7、elopers,ourlivesrevolvearoundworkingwithdata.Wecreatedatabasestostorethedata,codetoretrieveandmodifyit,andwebpagestocollectandsummarizeit.ThisisthefirsttutorialinalengthyseriesthatwillexploretechniquesforimplementingthesecommonpatternsinASP.We'llstartwithcreatingasoftwarearchitec
8、turecomposedofaDataAccessLayer(DAL)using
