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1、ASP.NETASP.NETisaunifiedWebdevelopmentmodelthatincludestheservicesnecessaryforyoutobuildenterprise-classWebapplicationswithaminimumofcoding.ASP.NETispartofthe.NETFramework,andwhencodingASP.NETapplicationsyouhaveaccesstoclassesinthe.NETFramework.Youcancodeyourapplicationsinanylanguagecompati
2、blewiththecommonlanguageruntime(CLR),includingMicrosoftVisualBasic,C#,JScript .NET,andJ#.TheselanguagesenableyoutodevelopASP.NETapplicationsthatbenefitfromthecommonlanguageruntime,typesafety,inheritance,andsoon.ASP.NETincludes:·Apageandcontrolsframework·TheASP.NETcompiler·Securityinfrastruc
3、ture·State-managementfacilities·Applicationconfiguration·Healthmonitoringandperformancefeatures·Debuggingsupport·AnXMLWebservicesframework·Extensiblehostingenvironmentandapplicationlifecyclemanagement·AnextensibledesignerenvironmentTheASP.NETpageandcontrolsframeworkisaprogrammingframeworkth
4、atrunsonaWebservertodynamicallyproduceandrenderASP.NETWebpages.ASP.NETWebpagescanberequestedfromanybrowserorclientdevice,andASP.NETrendersmarkup(suchasHTML)totherequestingbrowser.Asarule,youcanusethesamepageformultiplebrowsers,becauseASP.NETrenderstheappropriatemarkupforthebrowsermakingther
5、equest.However,youcandesign8yourASP.NETWebpagetotargetaspecificbrowser,suchasMicrosoftInternetExplorer6,andtakeadvantageofthefeaturesofthatbrowser.ASP.NETsupportsmobilecontrolsforWeb-enableddevicessuchascellularphones,handheldcomputers,andpersonaldigitalassistants(PDAs).ASP.NETWebpagesareco
6、mpletelyobject-oriented.WithinASP.NETWebpagesyoucanworkwithHTMLelementsusingproperties,methods,andevents.TheASP.NETpageframeworkremovestheimplementationdetailsoftheseparationofclientandserverinherentinWeb-basedapplicationsbypresentingaunifiedmodelforrespondingtoclienteventsincodethatrunsatt
7、heserver.Theframeworkalsoautomaticallymaintainsthestateofapageandthecontrolsonthatpageduringthepageprocessinglifecycle.TheASP.NETpageandcontrolsframeworkalsoenablesyoutoencapsulatecommonUIfunctionalityineasy-to-use,reusablecontrols.Controlsarewrittenonce